docs: design note for cookie-based preferences and access keys (#30 )

fix: atomic burn-after-read claim (#58 )
SoftDelete now reports whether it performed the delete (conditional UPDATE ... WHERE deleted_at IS NULL via RowsAffected). RegisterRead returns an admitted flag: legacy burn pastes admit exactly one reader (atomic soft-delete win), and burn-after-N pastes increment reads_used via a conditional UPDATE guarded on reads_used < reads_limit, so concurrent readers cannot both consume the final read. API/HTML/raw read paths return 404 when the reader loses the burn claim. Adds concurrency regression tests: 24 parallel readers of a burn paste (exactly one receives content) and 30 parallel readers vs a 3-read budget (exactly 3 admitted).
2026-09-09 09:13:07 -05:00 · 2026-09-09 09:12:49 -05:00
56 changed files with 521 additions and 3586 deletions
@@ -2,7 +2,7 @@ name: CI
 on:
  push:
-    branches: [main, dev]
+    branches: [main]
    tags: ['v*']
  pull_request:
@@ -23,8 +23,8 @@ jobs:
        run: go test -v ./...
  docker:
-    # build & push image only on tags (releases) and dev branch (dev deploy)
+    # build & push image only on tags (releases)
-    if: startsWith(github.ref, 'refs/tags/') || github.ref == 'refs/heads/dev'
+    if: startsWith(github.ref, 'refs/tags/')
    needs: test
    runs-on: [debian-latest]
    env:
@@ -55,9 +55,8 @@ jobs:
        with:
          context: .
          push: true
          build-args: VERSION=${{ gitea.ref_name }}
          tags: |
            git.archfox.org/poslop/palette:${{ gitea.ref_name }}
-            ${{ startsWith(gitea.ref, 'refs/tags/') && 'git.archfox.org/poslop/palette:latest' || '' }}
+            git.archfox.org/poslop/palette:latest
          cache-from: type=gha
          cache-to: type=gha,mode=max
@@ -9,8 +9,7 @@ COPY go.mod go.sum ./
 RUN go mod download
 COPY . .
-ARG VERSION=dev
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /palette ./cmd/palette
 RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w -X palette/internal/web.Version=${VERSION}" -o /palette ./cmd/palette
 # ---- runtime stage ----
 FROM alpine:3.20
@@ -1,679 +0,0 @@
 Palette - self-hosted pastebin with paste cans
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 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGES.
  17. Interpretation of Sections 15 and 16.
  If the disclaimer of warranty and limitation of liability provided
 above cannot be given local legal effect according to their terms,
 reviewing courts shall apply local law that most closely approximates
 an absolute waiver of all civil liability in connection with the
 Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.
                     END OF TERMS AND CONDITIONS
            How to Apply These Terms to Your New Programs
  If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
  To do so, attach the following notices to the program.  It is safest
 to attach them to the start of each source file to most effectively
 state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.
    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If your software can interact with users remotely through a computer
 network, you should also make sure that it provides a way for users to
 get its source.  For example, if your program is a web application, its
 interface could display a "Source" link that leads users to an archive
 of the code.  There are many ways you could offer source, and different
 solutions will be better for different programs; see section 13 for the
 specific requirements.
  You should also get your employer (if you work as a programmer) or school,
 if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU AGPL, see
 <https://www.gnu.org/licenses/>.
@@ -1,34 +1,33 @@
 # Palette
 Palette is a fast, self-hosted pastebin. One Go binary, a SQLite database, and
-a web UI for sharing text and small files
+a web UI for sharing code and text with links that expire on your terms.
 > [!NOTE]
 > <table><tr><td>
 > <sub>✨ This project was built by AI — <strong>GLM 5.3 Flash</strong> on the <strong>Hermes Agent</strong> harness, with a human in the loop.</sub>
 > </td></tr></table>
 ## Features
- Multiple files in one paste
+- Paste cans — bundle notes, text, and files into one shareable page
- Password protected pastes
+- Password lock — protect individual pastes with a password
- Expir after a specified time
+- Custom expiry — from 1 minute up to 1 year, or never
- Burn after a number of views
+- Burn after N reads — a paste that vanishes after a chosen number of reads
- Custom URLs
+- Custom URLs — reserve `/my-snippet` instead of a random slug
 - Syntax highlighting with language auto-detection (go-enry)
- Local cookie based submission history
+- Rate limiting on create and unlock
- Cookie based settings
+- Saved page — see and manage everything created from your browser
- Themes!
+- API-first — every UI action is also a plain HTTP call
-
+- Single binary — templates and assets are embedded; no external deps
 ## Screenshots
 | | |
 |---|---|
 | ![Editor in midnight](https://git.archfox.org/poslop/palette/wiki/raw/palette-previews%2Fmidnight-new.png) | ![Paste view in pastel-peach](https://git.archfox.org/poslop/palette/wiki/raw/palette-previews%2Fpastel-peach-paste.png) |
 | ![History in pastel-lavender](https://git.archfox.org/poslop/palette/wiki/raw/palette-previews%2Fpastel-lavender-history.png) | ![Saved in pastel-cloud](https://git.archfox.org/poslop/palette/wiki/raw/palette-previews%2Fpastel-cloud-mine.png) |
 ## Get Started
 ### Build from source
 Requires Go 1.21+.
 ```bash
 go build -o palette .
 ./palette
 # open http://localhost:8080
 ```
 ### Docker
 ```bash
@@ -37,22 +36,12 @@ docker run -p 8080:8080 -v palette-data:/data git.archfox.org/poslop/palette
 The SQLite database lives in the `/data` volume inside the container.
-## Docker Compose
+## Screenshots
 See [docker-compose.yml](docker-compose.yml) for a ready-to-use example with
 every environment variable documented, including which are required (only the
 /data volume) and which are optional.
 ### Build from source
 Requires Go 1.27+.
 ```bash
 go build -o palette ./cmd/palette
 ./palette
 # open http://localhost:8080
 ```
 | | |
 |---|---|
 | ![Editor](docs/palette-previews/pastel-lavender-new.png) | ![Paste view](docs/palette-previews/pastel-lavender-paste.png) |
 | ![History](docs/palette-previews/midnight-history.png) | |
 ## Configuration
@@ -64,34 +53,34 @@ go build -o palette ./cmd/palette
 | `PALETTE_MAX_ITEM` | `26214400` | Max can item size in bytes (25 MB) |
 | `PALETTE_ADMIN_KEY` | generated | Admin key; if unset a 32-char hex key is generated and persisted to `<db-dir>/admin-key` (0600) |
-An `/admin` page exists for runtime settings, protected by a key set at
+### Admin
-install (`PALETTE_ADMIN_KEY` env var) and resettable locally — see
+
-[API](https://git.archfox.org/poslop/palette/wiki/API) and the [design docs](https://git.archfox.org/poslop/palette/wiki/Home) in the wiki for details.
+`GET /admin` serves the admin page. Enter the admin key there — it is stored in
 `sessionStorage` (never a cookie) and sent as the `X-Admin-Key` header on
 `GET`/`POST /admin/api/settings`.
 The admin API reads/sets: rate-limit burst, rate-limit refill per minute, max
 content bytes, default expiry, custom URL reservation days, and the burn
 viewer window (minutes). All admin access attempts are logged.
 ```bash
 ./palette --reset-admin-key   # regenerate the admin key and print it
 ```
 ## API
-Full REST API: [wiki/API](https://git.archfox.org/poslop/palette/wiki/API). One example:
+Create a paste with one call:
 ```bash
-curl -X POST http://localhost:8080/api/pastes -d '{"content":"hello"}'
+curl -X POST http://localhost:8080/api/pastes \
  -H "Content-Type: application/json" \
  -d '{"content": "print(hello)", "language": "python", "expires_in": "168h"}'
 ```
-Design docs: [wiki/design](https://git.archfox.org/poslop/palette/wiki/design-attachments-storage) (e2e encryption, attachments & storage, cookie preferences).
+Full API docs: [docs/API.md](docs/API.md).
 ## CI
-
+Gitea Actions workflow at `.gitea/workflows/ci.yml`:
-
+- On push to main: `go vet` + `go test`
-## License
+- On tags: build and push Docker image to `git.archfox.org/poslop/palette`
 Palette is licensed under the GNU Affero General Public License v3.0
 (AGPL-3.0-only). See [LICENSE](LICENSE).
 The software is provided AS IS, without warranty of any kind, express or
 implied, including merchantability and fitness for a particular purpose.
 In no event shall the authors be liable for any claim, damages, or other
 liability, including without limitation any security vulnerabilities,
 data loss, or legal issues arising from use of the software. You use it
 at your own risk.
 If you run a modified version of Palette as a network service, the AGPL
 requires you to offer your modified source code to its users.
@@ -1,46 +0,0 @@
 # Example docker-compose deployment for Palette.
 # All environment variables are optional; sensible defaults apply.
 # The only hard requirement is a volume on /data so the SQLite database
 # and the auto-generated admin key survive restarts.
 services:
  palette:
    image: git.archfox.org/poslop/palette:v0.2.2
    # image: git.archfox.org/poslop/palette:latest   # tracks main, less stable
    restart: unless-stopped
    ports:
      - "8080:8080"          # host:container; the app listens on :8080
    volumes:
      - palette-data:/data   # REQUIRED: SQLite db, admin key, attachments
    environment:
      # Address the server binds to inside the container.
      # Default: ":8080". Only change if you also change the ports mapping.
      PALETTE_ADDR: ":8080"
      # Path to the SQLite database file.
      # Default: "/data/palette.db". Keep it on the /data volume.
      PALETTE_DB: "/data/palette.db"
      # Admin API key for /admin/api/settings (rate limits, size caps, expiry).
      # Default: random key generated on first start and persisted to
      # /data/admin-key (mode 0600). Read it with:
      #   docker compose exec palette cat /data/admin-key
      # Set this only if you want a fixed key (e.g. for automation).
      # PALETTE_ADMIN_KEY: "change-me"
      # Max size in bytes of a single text paste. Oversized creates get 413.
      # Default: 5242880 (5 MiB).
      # PALETTE_MAX_TEXT: "5242880"
      # Max size in bytes of a single can item (file/text inside a can).
      # Default: 26214400 (25 MiB).
      # PALETTE_MAX_ITEM: "26214400"
      # HMAC secret for password-unlock cookies. Default: random per start,
      # which logs out every unlocked browser session on restart. Set a fixed
      # secret (any random string) to keep unlock sessions across restarts,
      # or when running multiple replicas that must agree.
      # PALETTE_UNLOCK_SECRET: "generate-with-openssl-rand-base64-32"
 volumes:
  palette-data:
@@ -0,0 +1,107 @@
 # Palette API
 All endpoints are JSON unless noted. The web UI is served from the same port.
 ## Create paste
 ```bash
 curl -X POST http://localhost:8080/api/pastes \
  -H "Content-Type: application/json" \
  -d '{
    "content": "print(hello)",
    "title": "my snippet",
    "language": "python",
    "expires_in": "168h",
    "password": "optional",
    "custom_slug": "optional",
    "burn_after_read": false,
    "burn_after_reads": 1,
    "visibility": "public"
  }'
 ```
 - `expires_in` is a Go duration string (`90m`, `6h`, `336h`). Omit for no expiry.
 - `visibility` is `public` or `unlisted`.
 - `burn_after_reads` sets how many reads the paste survives (default 1 when
  `burn_after_read` is true). A read is counted per unique viewer session;
  the same viewer returning within 15 minutes does not count again.
 - Response includes `id`, `url`, `raw_url`, `api_url`, `expires_at`,
  `created_at`, and a one-time `deletion_token`.
 Errors: `400` invalid body/content too large/duplicate slug, `401` password
 required, `404` paste expired/burned/gone, `413` content exceeds max bytes,
 `429` rate limited.
 ## Get paste
 ```bash
 curl http://localhost:8080/api/pastes/{id}
 # password-protected pastes:
 curl "http://localhost:8080/api/pastes/{id}?password=secret"
 # or via header: X-Paste-Password: secret
 ```
 The response includes `reads_remaining` (`null` when no read budget is set).
 ## Raw content
 ```bash
 curl http://localhost:8080/raw/{id}
 ```
 Raw reads count against a burn-after-read budget, same as page views.
 ## Delete
 ```bash
 # soft delete (creator browser only; plain API clients unaffected)
 curl -X DELETE http://localhost:8080/api/pastes/{id}
 # hard delete immediately (requires the one-time deletion token)
 curl -X DELETE "http://localhost:8080/api/pastes/{id}/redeem?token=TOKEN"
 ```
 ## Lists
 ```bash
 curl "http://localhost:8080/api/public?limit=25&offset=0"   # public history
 curl http://localhost:8080/api/mine                          # this browser's pastes (viewer cookie)
 ```
 ## Language detection
 ```bash
 curl -X POST http://localhost:8080/api/guess-language \
  -H "Content-Type: application/json" \
  -d '{"content": "package main"}'
 ```
 ## Cans (bundles of items)
 ```bash
 curl -X POST http://localhost:8080/api/pastes/can \
  -F "title=My bundle" \
  -F "expires_in=48h" \
  -F 'json_items=[{"title":"notes.txt","content":"some notes"}]' \
  -F "files=@screenshot.png" \
  -F "files=@log.txt"
 curl http://localhost:8080/api/cans/{id}
 curl http://localhost:8080/api/cans/{id}/items/{item_id}
 ```
 ## Web pages
 - `/new` — create a paste
 - `/history` — public paste history
 - `/mine` — pastes created from this browser
 - `/{id}` — view a paste
 - `/unlock/{id}` — password gate for protected pastes
 - `/raw/{id}` — raw content with original content type
 ## Expiry and deletion
 - Expired pastes are soft-deleted by a background sweeper (runs every minute).
 - Soft-deleted pastes are hard-deleted after a 7-day grace period.
 - Deletion tokens allow immediate hard delete.
 - Burn-after-read pastes are soft-deleted once the read budget is exhausted.
@@ -0,0 +1,78 @@
 # Attachments & Storage Backend Design (#38, #31)
 Status: research/design, no implementation. Consumers: paste cans (#4).
 ## Part A — Attachments: S3/MinIO vs filesystem-on-volume (#38)
 ### Options
 **Option 1: Filesystem on the k3s PVC (current 5Gi volume).**
 Store blobs under `<data-dir>/attachments/<paste-id>/<n>-<sha256-8>`, metadata in SQLite (paste_id, filename, size, sha256, mime, created_at).
 - Pros: zero new infra, zero new credentials, trivial backup (the volume backup job already covers the DB), atomic rename on write, works in dev and prod identically.
 - Cons: volume is size-capped (5Gi today; resizable but bounded); serving large files passes through the app process (no ranged-GET offload); multi-replica later would need RWX volume.
 **Option 2: MinIO via S3 API.**
 MinIO is already proven in this homelab (Outline). Store at key `<paste-id>/<n>`; same SQLite metadata row.
 - Pros: effectively unbounded capacity, presigned URLs (direct browser download, offloads serving from palette pods), ranged requests free, lifecycle rules could auto-expire orphaned objects.
 - Cons: another credential/secret to manage, another failure mode, MultipartForm still terminates at the palette pod (MinIO only helps *serving*, not *uploading*, unless we do presigned uploads — which breaks the cans multipart flow and the auth/unlock checks), backup now spans two systems.
 ### Key considerations
 - **Upload path is the same either way.** Palette receives `multipart/form-data` (cans need text items + file drops in one request), must enforce auth/password/burn rules server-side. A filesystem backend adds no upload complexity; S3 adds an extra hop (buffer → PUT to MinIO). Streaming straight from `multipart.Reader` to the sink works for both (`io.Copy` to a temp file, or to an S3 PUT with `Content-Length` known or multipart buffering).
 - **Size limits.** Everything is admin-tunable via the settings API (#40 pattern) — add `max_attachment_bytes` (default 10 MiB, hard server-side cap checked *before* reading the body via `Content-Length`, plus a counted reader during copy so chunked uploads can't lie). SQLite itself is not a constraint either way; the PVC is the real cap for Option 1.
 - **MIME handling.** Security-critical (pentest #34 already fixed a content-type XSS on `/raw`). Rules:
  - Never trust the client-declared Content-Type. Sniff the first 512 bytes (`http.DetectContentType`), intersect with an allowlist.
  - Serve from a dedicated route (`/{id}/a/{n}`) with `Content-Type` from the stored *sniffed* type, `X-Content-Type-Options: nosniff`, `Content-Security-Policy: sandbox`, `Content-Disposition: attachment` unless the type is on a safe-inline allowlist (text/plain, images, PDF at user opt-in).
  - Never render user HTML/SVG inline (`image/svg+xml` is XSS-capable — serve as `attachment` always, or store sanitized).
 - **Streaming & serving.**
  - Filesystem: `http.ServeContent` on the opened file gives ranged GETs, ETag, Last-Modified for free.
  - MinIO: proxy via `GetObject` + `io.Copy` (simple, keeps auth checks in palette) or presigned GET (faster, but URL embeds credentials-temporarily and bypasses palette's per-request auth — wrong for pastes with passwords/burn semantics). Given cans inherit password/burn parity (#4), **proxying is required, which erodes MinIO's main serving advantage**.
 - **Lifecycle parity.** Attachments must honor soft-delete grace and sweep: sweeper hard-delete also removes blobs (files: `os.Remove`; S3: `DeleteObject`), best-effort with logging; orphan sweep job compares DB rows to store contents.
 ### Recommendation
 **Filesystem-on-volume first.** At current scale (single replica, PVC-based deploy, one user + homelab traffic) it is simpler end-to-end and keeps serving/auth/lifecycle in one place. The internal API should be a narrow blob interface (`Put(ctx, key, r io.Reader, size int64) / Open(key) / Delete(key)`) — about 60 lines per backend — so **MinIO becomes a drop-in later** if attachments outgrow the volume. That's the honest middle path: filesystem default, S3-ready seam, no MinIO dependency until it pays for itself.
 ## Part B — SQLite vs Postgres vs Redis (#31)
 ### Assessment of SQLite at pastebin scale
 - **Driver**: modernc.org/sqlite (pure Go, no cgo) — slightly slower than mattn/go-sqlite3 but fine; single-writer semantics are the real constraint, not driver speed.
 - **Access pattern**: paste-heavy, write-rare/read-often; primary keys and small set of indexes (visibility+created, expires, deleted); no joins beyond can items. This is SQLite's best case.
 - **WAL mode** is already on (`journal_mode(WAL), busy_timeout(5000)`) — concurrent readers don't block the single writer.
 - **Numbers**: SQLite comfortably handles millions of rows and hundreds of reads/sec; WAL write throughput is thousands of small inserts/sec. A pastebin doing even 100k pastes (avg 10 KB = ~1 GB DB) is trivial. Reads: prepared `WHERE id=?` lookups at this size are sub-millisecond.
 - **Weak points to watch** (document, none urgent):
  1. Single writer — heavy concurrent create traffic serializes. Mitigation: already rate-limited (#2); fine until that's the bottleneck (unlikely).
  2. `LENGTH(content)` on every list row — fine now; if it shows up in profiling, store `size` as a column (schema already has a `Size` field; list queries could use it).
  3. Sweeper runs a table-wide `UPDATE`+`DELETE` on tick — indexed, fine.
  4. No network access to the DB file — locks palette to single-replica. Acceptable: current deploy is one replica.
 - **Redis is the wrong tool** here: it's a cache/queue, not a system of record. Pastes are durable data with expiry semantics already implemented in SQLite. Redis would only add an optional read-cache layer for hot pastes — pure complexity for zero measured need.
 ### Should we build a backend abstraction (SQLite default, optional Postgres)?
 Arguments for: multi-replica scaling later; "docker image env choice" sounds nice; Postgres gives real concurrency and network access.
 Arguments against: a `Store` interface covering the current query surface is a real refactor (sqlite-flavored SQL: `INSERT OR IGNORE`-style upserts, partial indexes, `?` placeholders are compatible but behaviors differ — e.g. `sqlite` driver pragmas, transaction isolation, `AUTOINCREMENT` semantics); two backends means two test matrices and two migration paths forever; and there is **no current need** — single replica, single writer, modest data.
 **Recommendation: stay SQLite-only. Do not build the abstraction now.**
 Specifically:
 1. Keep all persistence behind `internal/store` (already done in #35 — the package boundary *is* the abstraction, at zero cost).
 2. Avoid SQLite-specific SQL going forward where free (standard placeholders, no `RETURNING` quirks) — cheap discipline that keeps a future port honest.
 3. Define the trigger conditions for revisiting, and write them down:
   - multiple replicas needed (scale-out), or
   - sustained WAL write contention (busy timeouts observed in logs), or
   - DB file > ~5-10 GB, or
   - a concrete user request for a Postgres-backed image.
 4. When a trigger fires, port `internal/store` to Postgres behind an interface extracted *then* — the refactor is mechanical against a real need, instead of speculative complexity now.
 5. For the docker image: `PALETTE_DB_PATH` env already implies the deployment choice; no extra backend knob needed.
 ## Summary
 | Decision | Choice |
 |---|---|
 | Attachment backend | Filesystem on PVC, behind a ~3-method blob interface; MinIO as a later drop-in, not a dependency |
 | Size limits | `max_attachment_bytes` admin setting, default 10 MiB, enforced pre-read + during stream |
 | MIME | Server-side sniff (512 bytes) + allowlist; `nosniff`, CSP `sandbox`, `Content-Disposition: attachment` except safe-inline types; SVG never inline |
 | Database | SQLite (WAL, modernc) only; no Postgres/Redis, no backend abstraction until a written trigger fires |
@@ -0,0 +1,160 @@
 # Design: Cookie-Based Preferences and Access Keys (#30)
 Status: design note — no implementation yet.
 Related: #37 (vwr viewer cookie), #34 (HMAC unlock cookie), #26 (creator auto-unlock), #36 (settings gear).
 ## Current cookie surface
 | Cookie | Purpose | Lifetime | Flags today |
 |---|---|---|---|
 | `vwr` | Anonymous viewer id; scopes `/mine` history and burn-after-N per-viewer dedupe; client-sent `vwr` also authorizes delete | 1 year | `HttpOnly`, `SameSite=Lax`, `Path=/` |
 | `pw_<id>` | Per-paste password unlock token = HMAC(paste id, PALETTE_UNLOCK_SECRET) | 1 hour | `HttpOnly`, `SameSite=Lax`, `Path=/` |
 | `tok_<id>` | One-time deletion-token handoff after create | 60 s | `HttpOnly`, `SameSite=Lax`, `Path=/` |
 The access-key feature is an extension of the `pw_<id>` pattern, not a new mechanism.
 ## Part 1: Preference storage
 ### What settings
 Only settings the *creator* sets when writing a paste, so the "new paste" form
 can pre-fill them:
 - Default language (`lang`)
 - Default expiry (`expires_in` / custom expiry)
 - Burn-after-N-reads default
 - Password-protect-by-default toggle (checkbox pre-checked; the password itself is never stored)
 - Default visibility of the "raw" link, if such a toggle exists
 - Collapsed/expanded state of the settings gear panel itself
 Never stored in cookies: passwords, access keys for pastes the user hasn't
 unlocked, deletion tokens (beyond the existing 60 s `tok_` handoff), anything
 typed into the paste body or title fields (existing rule: auto-detect must not
 overwrite user-typed content).
 ### One cookie, not many
 A single `prefs` cookie holding a compact JSON object:
 ```
 prefs={"lang":"go","exp":"1h","burn":0,"pw":1}
 ```
 - One cookie avoids the browser per-domain cookie count (typically 50+ per
  domain; Chrome 180) eating the budget that per-paste access-key cookies need.
 - Per-paste cookies (`pw_<id>`) are inherently name-per-paste and cannot be
  consolidated — that's the constraint that makes a single `prefs` cookie
  mandatory rather than stylistic.
 ### Size limits
 - RFC 6265: user agents SHOULD support at least 4096 bytes per cookie. Keep
  `prefs` under 256 bytes of JSON — it holds a handful of short enum values.
 - Server behavior: if the cookie is present but oversized/invalid JSON, ignore
  it silently and serve defaults. Never reject a request over a bad preference
  cookie.
 - Validate on the server (allowlist of known values); a cookie is untrusted
  input like any header.
 ### Flags
 `HttpOnly; SameSite=Lax; Path=/; Max-Age=31536000; Secure` (Secure once the
 prod instance serves HTTPS — it will, behind the letsencrypt IngressRoute;
 dev on plain HTTP needs the flag conditional on config).
 Preferences are not sensitive, but `HttpOnly` costs nothing and keeps script
 from mutating them; `SameSite=Lax` matches the existing cookies.
 ## Part 2: Access-key cookies
 ### Goal
 "Remember unlocked pastes on this browser" — after entering a password (or
 after creating a private paste), subsequent visits skip the unlock form. This
 extends `pw_<id>` from a 1-hour session convenience to a durable capability.
 ### Design: extend `pw_<id>`, don't invent a new scheme
 The token is already HMAC(paste id, PALETTE_UNLOCK_SECRET) — unforgeable and
 per-paste (fix for the #34 bypass). Changes:
 1. **Opt-in checkbox on the unlock form** ("remember on this browser") and a
   matching checkbox/note at creation time. Default OFF. Non-consenting
   visitors keep the current 1-hour cookie.
 2. **Extended lifetime** when opted in: `Max-Age = min(paste expiry, 90 days)`.
   The cookie must never outlive the paste — derive the cap from the paste's
   `ExpiresAt` at unlock time. Burn-after-N pastes: cap short (e.g. 24 h),
   since the paste may burn at any read.
 3. **Name collision**: paste ids are fixed-length server-generated, so
   `pw_<id>` names stay bounded (~40 bytes each). With the 50-cookies-per-
   domain budget, cap remembered pastes at ~30: when minting the 31st, drop
   the oldest expired-paste cookies server-side (server knows which ids are
   expired/deleted; send expired `Set-Cookie` with `Max-Age=0` to reclaim).
 4. **Delete authorization interplay**: today a client-sent `vwr` matching the
   paste's ViewerID authorizes delete. Access-key cookies grant *read*
   capability only. Do not let a `pw_<id>` cookie authorize deletion — that
   would mean cookie theft escalates from "read a paste" to "destroy it".
   Delete stays bound to `vwr` or the deletion token.
 ### Scoping
 - Keep `Path=/` (paste URLs are `/{id}` at the root; per-paste `Path=/{id}`
  would work but saves nothing and complicates cleanup).
 - Per-paste scope via the cookie *name* is the existing, tested pattern —
  no shared "access key ring" cookie. A consolidated `keys` cookie would
  mean one stolen cookie exposes every remembered paste at once.
 ## Part 3: Security considerations (honest accounting)
 - **XSS exfiltration**: `HttpOnly` prevents JS from *reading* the cookies, but
  not from *using* them — an XSS payload can simply `fetch('/<paste-id>')` and
  exfiltrate the content through the page the cookie unlocks. HttpOnly raises
  the bar (drive-by script can't dump the jar to an attacker server in one
  request), it does not make access-key cookies safe. This is a real
  limitation, not a solved problem. Mitigations in order of value:
  1. Fix the stored-XSS class at the source — #34 already allowlisted
     content-types on `/raw`; the standing debt items (CSP, X-Frame-Options,
     Referrer-Policy) directly reduce cookie-use exfiltration and should land
     before or with this feature.
  2. Keep access-key cookies opt-in, so the blast radius is bounded to users
     who accepted the tradeoff.
 - **Cookie theft = paste access**: anyone holding `pw_<id>` can read that
  paste until the cookie or paste expires, from any machine. That is inherent
  to capability cookies. Consequences accepted deliberately: pastes here are
  ephemeral (1 min–1 yr expiry), passwords are low-stakes share convenience,
  and there are no user accounts to compromise. Document this in the UI copy
  ("stores unlock access on this browser").
 - **Shared machines**: a remembered cookie defeats the password for the next
  user of the browser. The opt-in checkbox with plain-language copy is the
  mitigation; do not default it on.
 - **Cookie tossing / fixation**: a subdomain attacker could try to force
  cookies; palette is a single host, no untrusted subdomains. `SameSite=Lax`
  blocks cross-site attachment of the cookies on form posts to unlock
  endpoints.
 - **Multi-instance / secret rotation**: tokens are HMACs under
  `PALETTE_UNLOCK_SECRET`; rotating the secret silently invalidates all
  remembered cookies (acceptable — next visit re-prompts). Both dev and prod
  k3s instances need the same secret only if sharing a domain, which they do
  not.
 - **Preferences cookie**: not security-sensitive, but still validate/allowlist
  server-side to avoid it becoming an injection sink into templates.
 ## Recommendation
 Implement in two small, separately reviewable pieces:
 1. **`prefs` cookie** (do first, low risk): single JSON cookie < 256 bytes,
   server-validated allowlist, `HttpOnly; SameSite=Lax; Max-Age=1y`, drives
   only form pre-fill. Ship with #36's settings gear.
 2. **Extended `pw_<id>` opt-in** (second, security-sensitive): opt-in checkbox,
   Max-Age capped by paste expiry (90-day ceiling, 24 h for burn pastes),
   oldest-cookie eviction at ~30 pastes, no delete authorization from access
   cookies, and land the CSP/X-Frame-Options hardening debt from #34 in the
   same or preceding change. UI copy must disclose that the cookie preserves
   paste access on the browser.
 Rejected alternatives: single consolidated access-key cookie (aggregate theft
 risk, and the per-domain cookie-count argument cuts the other way for keys —
 consolidation maximizes what one stolen cookie unlocks); localStorage for
 preferences (XSS-readable, no benefit over HttpOnly cookies here); server-side
 accounts/session table (out of scope — Palette is deliberately anonymous).
@@ -172,11 +172,6 @@ func (a *apiServer) adminKeyOK(r *http.Request, key string) bool {
 func (a *apiServer) adminAuth(next http.HandlerFunc, key string) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		if !rateLimitAdmin(r) {
 			log.Printf("admin auth RATE LIMITED: %s %s from %s", r.Method, r.URL.Path, r.RemoteAddr)
 			writeRateLimited(w, 60)
 			return
 		}
 		if !a.adminKeyOK(r, key) {
 			log.Printf("admin auth FAILURE: %s %s from %s", r.Method, r.URL.Path, r.RemoteAddr)
 			writeErr(w, 401, "unauthorized")
@@ -1,80 +0,0 @@
 package api
 // #66: admin key attempts must be rate limited per IP (5/min), constant-time
 // compared, and failures logged. Hammering bad keys must yield 429s.
 import (
 	"net/http/httptest"
 	"strings"
 	"testing"
 )
 // TestAdminKeyRateLimited: burst of 5 bad-key attempts allowed (401), the 6th
 // gets 429, and even the correct key is blocked from that IP until refill.
 func TestAdminKeyRateLimited(t *testing.T) {
 	srv := newTestServer(t)
 	h := srv.routes()
 	reqIP := "10.7.7.1:1234"
 	var got429, retryAfter bool
 	var lastCode int
 	for i := 0; i < 10; i++ {
 		req := httptest.NewRequest("POST", "/admin/api/settings", nil)
 		req.RemoteAddr = reqIP
 		req.Header.Set("X-Admin-Key", "wrong-key")
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		lastCode = rec.Code
 		if rec.Code == 429 {
 			got429 = true
 			retryAfter = rec.Header().Get("Retry-After") != ""
 			break
 		}
 	}
 	if !got429 {
 		t.Fatalf("expected 429 after hammering bad keys, last status %d", lastCode)
 	}
 	if !retryAfter {
 		t.Error("429 missing Retry-After header")
 	}
 	// Correct key from the same IP is also locked out.
 	req := httptest.NewRequest("POST", "/admin/api/settings", nil)
 	req.RemoteAddr = reqIP
 	req.Header.Set("X-Admin-Key", srv.adminKey)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 429 {
 		t.Errorf("correct key after lockout: got %d, want 429", rec.Code)
 	}
 	// A different IP is unaffected.
 	req2 := httptest.NewRequest("POST", "/admin/api/settings", strings.NewReader(`{"rate_limit_burst":5,"rate_limit_per_minute":60,"max_content_bytes":1048576,"custom_slug_reservation_days":30,"burn_viewer_window_minutes":15}`))
 	req2.RemoteAddr = "203.0.113.9:1234"
 	req2.Header.Set("X-Admin-Key", srv.adminKey)
 	rec2 := httptest.NewRecorder()
 	h.ServeHTTP(rec2, req2)
 	if rec2.Code != 200 {
 		t.Errorf("correct key from another IP: got %d, want 200", rec2.Code)
 	}
 }
 // TestAdminKeyConstantTimeCompare: sanity check that the comparison is
 // constant-time (uses subtle.ConstantTimeCompare, not ==).
 func TestAdminKeyConstantTimeCompare(t *testing.T) {
 	srv := newTestServer(t)
 	r := httptest.NewRequest("GET", "/", nil)
 	r.Header.Set("X-Admin-Key", "test-admin-key")
 	if !srv.adminKeyOK(r, srv.adminKey) {
 		t.Fatal("correct key rejected")
 	}
 	r.Header.Set("X-Admin-Key", "wrong")
 	if srv.adminKeyOK(r, srv.adminKey) {
 		t.Fatal("wrong key accepted")
 	}
 	// differ in length: must not panic/mismatch unexpectedly
 	r.Header.Set("X-Admin-Key", "test-admin-key-longer")
 	if srv.adminKeyOK(r, srv.adminKey) {
 		t.Fatal("longer wrong key accepted")
 	}
 }
@@ -1,103 +0,0 @@
 package api
 import (
 	"encoding/json"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"sync"
 	"testing"
 )
 // TestBurnAfterReadConcurrentRace is the #58 regression test: N concurrent
 // readers of a burn-after-read paste must receive exactly one success with
 // content; every other reader must get 404 and never any content.
 func TestBurnAfterReadConcurrentRace(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	id := createBurnReads(t, h, 1)
 	const readers = 24
 	var wg sync.WaitGroup
 	var mu sync.Mutex
 	wins, losses := 0, 0
 	for i := 0; i < readers; i++ {
 		wg.Add(1)
 		go func(i int) {
 			defer wg.Done()
 			req := httptest.NewRequest("GET", "/api/pastes/"+id, nil)
 			req.AddCookie(&http.Cookie{Name: "vwr", Value: fmt.Sprintf("racer-%d", i)})
 			rec := httptest.NewRecorder()
 			h.ServeHTTP(rec, req)
 			mu.Lock()
 			defer mu.Unlock()
 			if rec.Code == 200 {
 				wins++
 				var got struct {
 					Content string `json:"content"`
 				}
 				if err := json.Unmarshal(rec.Body.Bytes(), &got); err != nil || got.Content != "limited" {
 					t.Errorf("winning read returned wrong content: %v %q", err, got.Content)
 				}
 			} else if rec.Code == 404 {
 				losses++
 				if strings.Contains(rec.Body.String(), "limited") {
 					t.Errorf("losing read leaked content: %s", rec.Body.String())
 				}
 			} else {
 				t.Errorf("unexpected status %d: %s", rec.Code, rec.Body.String())
 			}
 		}(i)
 	}
 	wg.Wait()
 	if wins != 1 {
 		t.Fatalf("expected exactly 1 winning read of burn paste, got %d (losses=%d)", wins, losses)
 	}
 	if losses != readers-1 {
 		t.Fatalf("expected %d losing reads, got %d", readers-1, losses)
 	}
 }
 // TestBurnAfterNReadsConcurrentBudget hammers a burn-after-N paste with many
 // more concurrent distinct readers than the budget: total admissions must
 // equal exactly N, and no losing read may see content.
 func TestBurnAfterNReadsConcurrentBudget(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	const budget = 3
 	id := createBurnReads(t, h, budget)
 	const readers = 30
 	var wg sync.WaitGroup
 	var mu sync.Mutex
 	wins := 0
 	for i := 0; i < readers; i++ {
 		wg.Add(1)
 		go func(i int) {
 			defer wg.Done()
 			req := httptest.NewRequest("GET", "/api/pastes/"+id, nil)
 			req.AddCookie(&http.Cookie{Name: "vwr", Value: fmt.Sprintf("racer-%d", i)})
 			rec := httptest.NewRecorder()
 			h.ServeHTTP(rec, req)
 			mu.Lock()
 			defer mu.Unlock()
 			if rec.Code == 200 {
 				wins++
 			} else if rec.Code != 404 {
 				t.Errorf("unexpected status %d: %s", rec.Code, rec.Body.String())
 			}
 		}(i)
 	}
 	wg.Wait()
 	if wins != budget {
 		t.Fatalf("expected exactly %d admitted reads, got %d", budget, wins)
 	}
 	// After the race, the paste is burned for everyone.
 	if rec := getWithCookie(t, h, id, "after-the-fact"); rec.Code != 404 {
 		t.Fatalf("paste should be burned after budget exhausted, got %d", rec.Code)
 	}
 }
@@ -46,33 +46,6 @@ func getWithCookie(t *testing.T, h anyHandler, id, viewer string) *httptest.Resp
 	return rec
 }
 // #82: burn_after_reads > 0 alone must enable burn-after-read
 // even without burn_after_read: true.
 func TestBurnReadsImpliedByBurnAfterReads(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"implied","burn_after_reads":2}`))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 201 {
 		t.Fatalf("create burn_after_reads-only: %d %s", rec.Code, rec.Body.String())
 	}
 	var created struct {
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	if rec := getWithCookie(t, h, created.ID, "aaa"); rec.Code != 200 {
 		t.Fatalf("read 1: %d", rec.Code)
 	}
 	if rec := getWithCookie(t, h, created.ID, "bbb"); rec.Code != 200 {
 		t.Fatalf("read 2: %d", rec.Code)
 	}
 	if rec := getWithCookie(t, h, created.ID, "ccc"); rec.Code != 404 {
 		t.Fatalf("read 3 expected 404 (burned), got %d", rec.Code)
 	}
 }
 func TestBurnAfterNReadsDistinctViewers(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
@@ -1,17 +1,15 @@
 package api
 import (
 	"palette/internal/store"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 	"palette/internal/store"
 	"strings"
 	"time"
 	"github.com/go-chi/chi/v5"
 	"palette/internal/web"
 )
 // CreateCan makes a can with N items (multipart form).
@@ -28,25 +26,24 @@ func (a *apiServer) handleCreateCan(w http.ResponseWriter, r *http.Request) {
 		visibility = "public"
 	}
 	if visibility != "public" && visibility != "unlisted" {
-		writeErrCode(w, 400, "invalid_visibility", "visibility must be public or unlisted")
+		writeErr(w, 400, "visibility must be public or unlisted")
 		return
 	}
 	expiresIn := r.FormValue("expires_in")
 	password := r.FormValue("password")
 	customSlug := r.FormValue("custom_slug")
 	var expiresAt *int64
 	now := time.Now().Unix()
 	if expiresIn != "" {
 		d, err := time.ParseDuration(expiresIn)
 		if err != nil {
-			writeErrCode(w, 400, "expiry_invalid", "invalid expires_in")
+			writeErr(w, 400, "invalid expires_in")
 			return
 		}
-		// #60/#48: clamp at the API boundary like the pastes API does -
+		// #60: clamp at the API boundary like the pastes API does —
 		// reject zero/negative and durations past the 1-year UI cap.
 		if !store.ValidExpiry(d) {
-			writeErrCode(w, 400, "expiry_invalid", "expires_in must be between 1 minute and 1 year")
+			writeErr(w, 400, "expires_in must be between 1 minute and 1 year")
 			return
 		}
 		t := now + int64(d.Seconds())
@@ -63,25 +60,11 @@ func (a *apiServer) handleCreateCan(w http.ResponseWriter, r *http.Request) {
 	}
 	canID := store.GenSlug(8)
-	var slugPtr *string
+	err := a.store.InsertCan(canID, title, r.FormValue("description"), visibility, pwHash, now, expiresAt)
 	if customSlug != "" {
 		slugPtr = &customSlug
 	}
 	err := a.store.CreateCan(canID, title, r.FormValue("description"), visibility, pwHash, now, expiresAt, slugPtr)
 	if err != nil {
 		switch err {
 		case store.ErrSlugTaken, store.ErrInvalidSlug, store.ErrReservedSlug:
 			writeErrCode(w, 409, createErrCode(err), err.Error())
 		default:
 		writeErr(w, 500, "db error")
 		}
 		return
 	}
 	if slugPtr != nil {
 		canID = customSlug // #4: custom slug becomes the can id
 	}
 	// #4: remember the creating browser so /mine and viewer-scoped delete work
 	a.store.Exec(`UPDATE paste_cans SET viewer_id=? WHERE id=?`, currentViewerID(r), canID)
 	// text items passed as JSON array: [{"title":"notes.txt","content":"..."}]
 	itemCount := 0
@@ -137,7 +120,7 @@ func (a *apiServer) handleCreateCan(w http.ResponseWriter, r *http.Request) {
 	if itemCount == 0 {
 		a.store.DeleteCan(canID)
-		writeErrCode(w, 400, "content_empty", "can needs at least one item (files or json_items)")
+		writeErr(w, 400, "can needs at least one item (files or json_items)")
 		return
 	}
@@ -146,29 +129,6 @@ func (a *apiServer) handleCreateCan(w http.ResponseWriter, r *http.Request) {
 	})
 }
 // handleDeleteCan soft-deletes a can (parity with paste deletion, #63):
 // requires the vwr viewer cookie matching the can's viewer (cans carry no
 // deletion token since they are built in the browser).
 func (a *apiServer) handleDeleteCan(w http.ResponseWriter, r *http.Request) {
 	id := chi.URLParam(r, "id")
 	can, err := a.store.GetCan(id)
 	if err != nil || can == nil {
 		writeErr(w, 404, "can not found")
 		return
 	}
 	vid := currentViewerID(r)
 	if !(vid != "" && viewerSentCookie(r) && can.ViewerID.Valid &&
 		can.ViewerID.String != "" && can.ViewerID.String == vid) {
 		writeErr(w, 403, "deletion not authorized")
 		return
 	}
 	if _, err := a.store.SoftDeleteCan(can.ID); err != nil {
 		writeErr(w, 500, "db error")
 		return
 	}
 	writeJSON(w, 200, map[string]string{"status": "soft-deleted"})
 }
 func detectContentType(name string, content []byte) string {
 	lower := strings.ToLower(name)
 	switch {
@@ -189,6 +149,8 @@ func detectContentType(name string, content []byte) string {
 	return "text/plain"
 }
 func (a *apiServer) handleGetCan(w http.ResponseWriter, r *http.Request) {
 	id := chi.URLParam(r, "id")
 	can, err := a.store.GetCan(id)
@@ -251,8 +213,7 @@ func (a *apiServer) handleCanItem(w http.ResponseWriter, r *http.Request) {
 		writeErr(w, 404, "not a can item")
 		return
 	}
-	// inherit can password protection: password via header/query, or the
+	// inherit can password protection
 	// same pw_<can> unlock cookie the can page sets (#4 cookie parity).
 	can, _ := a.store.GetCan(row.CanID.String)
 	if can != nil && can.PasswordHash.Valid {
 		pw := r.Header.Get("X-Paste-Password")
@@ -260,14 +221,10 @@ func (a *apiServer) handleCanItem(w http.ResponseWriter, r *http.Request) {
 			pw = r.URL.Query().Get("password")
 		}
 		if pw == "" || !store.CheckPassword(can.PasswordHash.String, pw) {
 			// fall back to the browser's unlock cookie for this can
 			c, cerr := r.Cookie("pw_" + can.ID)
 			if cerr != nil || c.Value != web.UnlockToken(can.ID) {
 			writeErr(w, 401, "password required")
 			return
 		}
 	}
 	}
 	// #34: same content-type guard as /raw — never serve active content types.
 	ct := row.ContentType
 	if !safeRawContentType(ct) {
@@ -1,45 +0,0 @@
 package api
 import (
 	"net/http/httptest"
 	"testing"
 )
 // #60: the cans API must clamp expires_in at the boundary exactly like the
 // pastes API — reject zero/negative durations and anything over the 1-year
 // UI cap, accept the exact boundaries.
 func TestCreateCanExpiryBounds(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	cases := []struct {
 		expiresIn string
 		wantCode  int
 	}{
 		{"-1h", 400},    // negative
 		{"-0s", 400},    // negative zero
 		{"0s", 400},     // zero
 		{"1ns", 400},    // positive but below the 1-minute floor
 		{"59s", 400},    // just under the floor
 		{"1m", 201},     // exactly the floor
 		{"90s", 201},    // just over the floor
 		{"8760h", 201},  // exactly 1 year
 		{"8785h", 400},  // 1 year + 1 day: over the cap
 		{"87600h", 400}, // 10 years, the originally reported case
 	}
 	for _, c := range cases {
 		globalLimiter = newLimiter() // avoid create rate limit between cases
 		body, ct := multipartBody(t, map[string]string{
 			"json_items": `[{"title":"a.txt","content":"AAA"}]`,
 			"expires_in": c.expiresIn,
 		}, "files", "pic.txt", "file data")
 		req := httptest.NewRequest("POST", "/api/pastes/can", body)
 		req.Header.Set("Content-Type", ct)
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		if rec.Code != c.wantCode {
 			t.Errorf("expires_in %q: got %d want %d (%s)",
 				c.expiresIn, rec.Code, c.wantCode, rec.Body.String())
 		}
 	}
 }
@@ -1,413 +0,0 @@
 package api
 import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 	"palette/internal/store"
 )
 // #4: cans appear in /api/public as normal rows with is_can=true.
 func TestCanInPublicListing(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	// a can and a regular paste
 	body, ct := multipartBody(t, map[string]string{
 		"title":      "Listed can",
 		"json_items": `[{"title":"a.txt","content":"AAA"}]`,
 	}, "", "", "")
 	req := httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 201 {
 		t.Fatalf("create can: %d %s", rec.Code, rec.Body.String())
 	}
 	var created struct{ ID string `json:"id"` }
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	req = httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"plain"}`))
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	req = httptest.NewRequest("GET", "/api/public", nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("public: %d", rec.Code)
 	}
 	var got struct {
 		Total int `json:"total"`
 		Items []struct {
 			ID    string `json:"id"`
 			IsCan bool   `json:"is_can"`
 			Title any    `json:"title"`
 		} `json:"items"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &got)
 	if got.Total != 2 {
 		t.Fatalf("expected total 2 (can + paste), got %d", got.Total)
 	}
 	foundCan := false
 	for _, it := range got.Items {
 		if it.ID == created.ID {
 			if !it.IsCan {
 				t.Fatalf("can row missing is_can flag")
 			}
 			foundCan = true
 		} else if it.IsCan {
 			t.Fatalf("plain paste flagged as can")
 		}
 	}
 	if !foundCan {
 		t.Fatalf("can not present in /api/public")
 	}
 	// #4: unlisted can must not be listed
 	body2, ct2 := multipartBody(t, map[string]string{
 		"title":       "Hidden can",
 		"visibility":  "unlisted",
 		"json_items":  `[{"title":"b.txt","content":"BBB"}]`,
 	}, "", "", "")
 	req = httptest.NewRequest("POST", "/api/pastes/can", body2)
 	req.Header.Set("Content-Type", ct2)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 201 {
 		t.Fatalf("unlisted can create: %d", rec.Code)
 	}
 	req = httptest.NewRequest("GET", "/api/public", nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if strings.Contains(rec.Body.String(), "Hidden can") {
 		t.Fatalf("unlisted can leaked into /api/public")
 	}
 }
 // #4: custom slug support for cans + conflict with existing paste slug.
 func TestCanCustomSlug(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	body, ct := multipartBody(t, map[string]string{
 		"title":       "Slugged",
 		"custom_slug": "my-bundle",
 		"json_items":  `[{"title":"a.txt","content":"AAA"}]`,
 	}, "", "", "")
 	req := httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 201 {
 		t.Fatalf("create can with slug: %d %s", rec.Code, rec.Body.String())
 	}
 	var created struct{ ID, URL string }
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	if created.ID != "my-bundle" {
 		t.Fatalf("expected id my-bundle, got %q", created.ID)
 	}
 	// custom slug resolves on the can page route
 	req = httptest.NewRequest("GET", "/can/my-bundle", nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 || !strings.Contains(rec.Body.String(), "Slugged") {
 		t.Fatalf("can page by slug: %d", rec.Code)
 	}
 	// duplicate slug rejected 409
 	body, ct = multipartBody(t, map[string]string{
 		"title": "Again", "custom_slug": "my-bundle",
 		"json_items": `[{"title":"a.txt","content":"AAA"}]`,
 	}, "", "", "")
 	req = httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 409 {
 		t.Fatalf("duplicate slug expected 409, got %d", rec.Code)
 	}
 	// reserved slug rejected
 	body, ct = multipartBody(t, map[string]string{
 		"title": "R", "custom_slug": "admin",
 		"json_items": `[{"title":"a.txt","content":"AAA"}]`,
 	}, "", "", "")
 	req = httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 409 {
 		t.Fatalf("reserved slug expected 409, got %d", rec.Code)
 	}
 }
 // #4: invalid expiry rejected on cans, mirroring paste behavior (#48).
 func TestCanExpiryValidation(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	body, ct := multipartBody(t, map[string]string{
 		"title": "Bad expiry", "expires_in": "30s",
 		"json_items": `[{"title":"a.txt","content":"AAA"}]`,
 	}, "", "", "")
 	req := httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 400 {
 		t.Fatalf("expected 400 for 30s expiry, got %d", rec.Code)
 	}
 }
 // #4: expired cans 404 on the page and API.
 func TestCanExpiryAccess(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	body, ct := multipartBody(t, map[string]string{
 		"title": "Dying", "expires_in": "1h",
 		"json_items": `[{"title":"a.txt","content":"AAA"}]`,
 	}, "", "", "")
 	req := httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var created struct{ ID string `json:"id"` }
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	// backdate expiry to force the expired path
 	s.store.Exec(`UPDATE paste_cans SET expires_at=? WHERE id=?`, 100, created.ID)
 	req = httptest.NewRequest("GET", "/api/cans/"+created.ID, nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 404 {
 		t.Fatalf("expired can API expected 404, got %d", rec.Code)
 	}
 	req = httptest.NewRequest("GET", "/can/"+created.ID, nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 404 {
 		t.Fatalf("expired can page expected 404, got %d", rec.Code)
 	}
 }
 // #4: password-protected can page uses the same unlock flow as pastes.
 func TestCanUnlockFlow(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	body, ct := multipartBody(t, map[string]string{
 		"title": "Locked can", "password": "pw123",
 		"json_items": `[{"title":"secret.txt","content":"sec content"}]`,
 	}, "", "", "")
 	req := httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var created struct{ ID string `json:"id"` }
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	// GET page without cookie -> unlock form
 	req = httptest.NewRequest("GET", "/can/"+created.ID, nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 || !strings.Contains(rec.Body.String(), "locked") {
 		t.Fatalf("expected unlock form, got %d", rec.Code)
 	}
 	// POST wrong password -> unlock form with error
 	fd := strings.NewReader("password=wrong")
 	req = httptest.NewRequest("POST", "/can/"+created.ID, fd)
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if !strings.Contains(rec.Body.String(), "Wrong password") {
 		t.Fatalf("expected wrong-password message")
 	}
 	// POST correct password -> page renders, cookie set
 	fd = strings.NewReader("password=pw123")
 	req = httptest.NewRequest("POST", "/can/"+created.ID, fd)
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if !strings.Contains(rec.Body.String(), "sec content") {
 		t.Fatalf("unlocked can page missing item content")
 	}
 	var pwCookie *http.Cookie
 	for _, c := range rec.Result().Cookies() {
 		if c.Name == "pw_"+created.ID {
 			pwCookie = c
 		}
 	}
 	if pwCookie == nil {
 		t.Fatalf("unlock cookie not set")
 	}
 	// GET with cookie -> unlocked
 	req = httptest.NewRequest("GET", "/can/"+created.ID, nil)
 	req.AddCookie(pwCookie)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if !strings.Contains(rec.Body.String(), "sec content") {
 		t.Fatalf("cookie unlock failed: %d", rec.Code)
 	}
 	// a forged cookie value must not unlock
 	req = httptest.NewRequest("GET", "/can/"+created.ID, nil)
 	req.AddCookie(&http.Cookie{Name: "pw_" + created.ID, Value: "forged"})
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if strings.Contains(rec.Body.String(), "sec content") {
 		t.Fatalf("forged cookie unlocked the can")
 	}
 }
 // #4: can item access inherits the can unlock cookie (not just query param).
 func TestCanItemCookieParity(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	body, ct := multipartBody(t, map[string]string{
 		"title": "Cookie can", "password": "pw123",
 		"json_items": `[{"title":"s.txt","content":"sec"}]`,
 	}, "", "", "")
 	req := httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var created struct{ ID string `json:"id"` }
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	// unlock via page to get the cookie
 	fd := strings.NewReader("password=pw123")
 	req = httptest.NewRequest("POST", "/can/"+created.ID, fd)
 	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var pwCookie *http.Cookie
 	for _, c := range rec.Result().Cookies() {
 		if c.Name == "pw_"+created.ID {
 			pwCookie = c
 		}
 	}
 	if pwCookie == nil {
 		t.Fatalf("no unlock cookie")
 	}
 	// item id from API (with password query)
 	req = httptest.NewRequest("GET", "/api/cans/"+created.ID+"?password=pw123", nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var can struct {
 		Items []struct{ ID string `json:"id"` } `json:"items"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &can)
 	itemID := can.Items[0].ID
 	// API item with the unlock cookie but no password -> 200
 	req = httptest.NewRequest("GET", "/api/cans/"+created.ID+"/items/"+itemID, nil)
 	req.AddCookie(pwCookie)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("item via cookie expected 200, got %d", rec.Code)
 	}
 	// forged cookie -> 401
 	req = httptest.NewRequest("GET", "/api/cans/"+created.ID+"/items/"+itemID, nil)
 	req.AddCookie(&http.Cookie{Name: "pw_" + created.ID, Value: "forged"})
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 401 {
 		t.Fatalf("forged cookie on item expected 401, got %d", rec.Code)
 	}
 }
 // #4: viewer-scoped soft delete of cans.
 func TestCanDeleteParity(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	body, ct := multipartBody(t, map[string]string{
 		"title": "Doomed", "json_items": `[{"title":"a.txt","content":"AAA"}]`,
 	}, "", "", "")
 	req := httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	req.AddCookie(&http.Cookie{Name: "vwr", Value: "creator"})
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var created struct{ ID string `json:"id"` }
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	// delete without matching viewer -> 403
 	req = httptest.NewRequest("DELETE", "/api/cans/"+created.ID, nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 403 {
 		t.Fatalf("unauthorized delete expected 403, got %d", rec.Code)
 	}
 	// creator's browser -> 200
 	req = httptest.NewRequest("DELETE", "/api/cans/"+created.ID, nil)
 	req.AddCookie(&http.Cookie{Name: "vwr", Value: "creator"})
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("creator delete expected 200, got %d", rec.Code)
 	}
 	// gone from API and page
 	req = httptest.NewRequest("GET", "/api/cans/"+created.ID, nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 404 {
 		t.Fatalf("deleted can expected 404, got %d", rec.Code)
 	}
 	// gone from listings
 	req = httptest.NewRequest("GET", "/api/public", nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if strings.Contains(rec.Body.String(), "Doomed") {
 		t.Fatalf("deleted can still listed")
 	}
 }
 // #4: cans appear in /api/mine for the creating browser.
 func TestCanInMine(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	body, ct := multipartBody(t, map[string]string{
 		"title": "Mine can", "json_items": `[{"title":"a.txt","content":"AAA"}]`,
 	}, "", "", "")
 	req := httptest.NewRequest("POST", "/api/pastes/can", body)
 	req.Header.Set("Content-Type", ct)
 	req.AddCookie(&http.Cookie{Name: "vwr", Value: "v-mine"})
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 201 {
 		t.Fatalf("create: %d", rec.Code)
 	}
 	req = httptest.NewRequest("GET", "/api/mine", nil)
 	req.AddCookie(&http.Cookie{Name: "vwr", Value: "v-mine"})
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var got struct {
 		Items []struct {
 			ID    string `json:"id"`
 			IsCan bool   `json:"is_can"`
 		} `json:"items"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &got)
 	if len(got.Items) != 1 || !got.Items[0].IsCan {
 		t.Fatalf("can missing from /api/mine: %s", rec.Body.String())
 	}
 }
 // #4: sweep soft-deletes expired cans (parity with pastes).
 func TestCanSweepExpired(t *testing.T) {
 	s := testServer(t)
 	s.store.CreateCan("sweepcan", "sweep", "", "public", nil, 1, nil, nil)
 	s.store.InsertCanItem("sweepcan", "a.txt", "AAA", "text/plain", nil, nil, nil, 1)
 	s.store.Exec(`UPDATE paste_cans SET expires_at=? WHERE id=?`, 100, "sweepcan")
 	s.store.SweepExpired()
 	if can, _ := s.store.GetCan("sweepcan"); can != nil {
 		t.Fatalf("expired can survived sweep")
 	}
 	_ = store.GenSlug(4) // keep import if store pkg shrinks
 }
@@ -1,172 +0,0 @@
 package api
 // Regression tests for #63: DELETE /api/pastes/{id} must require the
 // deletion token (Authorization header or ?token= query param, constant-time
 // compare). Without a token, or with a wrong token, the paste must survive
 // and the response must be 403.
 import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 )
 // createTestPaste creates a paste via the API and returns id + deletion token.
 func createTestPaste(t *testing.T, h http.Handler) (string, string) {
 	t.Helper()
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"delete me"}`))
 	req.Header.Set("Content-Type", "application/json")
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 201 {
 		t.Fatalf("create: got %d want 201: %s", rec.Code, rec.Body.String())
 	}
 	var created struct {
 		ID            string `json:"id"`
 		DeletionToken string `json:"deletion_token"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	if created.ID == "" || created.DeletionToken == "" {
 		t.Fatalf("create response missing id/deletion_token: %s", rec.Body.String())
 	}
 	return created.ID, created.DeletionToken
 }
 func pasteExists(t *testing.T, h http.Handler, id string) bool {
 	t.Helper()
 	req := httptest.NewRequest("GET", "/api/pastes/"+id, nil)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code == 200 {
 		return true
 	}
 	if rec.Code == 404 {
 		return false
 	}
 	t.Fatalf("get after delete: got %d", rec.Code)
 	return false
 }
 func TestDeleteWithoutTokenForbidden(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	id, _ := createTestPaste(t, h)
 	rec := doReq(t, h, "DELETE", "/api/pastes/"+id, "", "")
 	if rec.Code != http.StatusForbidden {
 		t.Fatalf("delete without token: got %d want 403", rec.Code)
 	}
 	if !pasteExists(t, h, id) {
 		t.Fatal("paste was deleted without a token")
 	}
 }
 func TestDeleteWithWrongTokenForbidden(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	id, _ := createTestPaste(t, h)
 	// query param
 	rec := doReq(t, h, "DELETE", "/api/pastes/"+id+"?token=wrong-token", "", "")
 	if rec.Code != http.StatusForbidden {
 		t.Fatalf("delete with wrong token (query): got %d want 403", rec.Code)
 	}
 	// header
 	req := httptest.NewRequest("DELETE", "/api/pastes/"+id, nil)
 	req.Header.Set("Authorization", "Bearer wrong-token")
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != http.StatusForbidden {
 		t.Fatalf("delete with wrong token (header): got %d want 403", rec.Code)
 	}
 	if !pasteExists(t, h, id) {
 		t.Fatal("paste was deleted with a wrong token")
 	}
 }
 func TestDeleteWithCorrectToken(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	id, tok := createTestPaste(t, h)
 	// via Authorization header
 	req := httptest.NewRequest("DELETE", "/api/pastes/"+id, nil)
 	req.Header.Set("Authorization", "Bearer "+tok)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("delete with correct token (header): got %d want 200: %s", rec.Code, rec.Body.String())
 	}
 	if pasteExists(t, h, id) {
 		t.Fatal("paste still exists after authorized delete")
 	}
 	// via query param
 	id, tok = createTestPaste(t, h)
 	rec = doReq(t, h, "DELETE", "/api/pastes/"+id+"?token="+tok, "", "")
 	if rec.Code != 200 {
 		t.Fatalf("delete with correct token (query): got %d want 200", rec.Code)
 	}
 	if pasteExists(t, h, id) {
 		t.Fatal("paste still exists after authorized delete (query)")
 	}
 }
 func TestDeleteByCreatorViewerCookieStillAllowed(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	// create from a specific browser
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"mine"}`))
 	req.Header.Set("Content-Type", "application/json")
 	req.AddCookie(&http.Cookie{Name: "vwr", Value: "creator-abc"})
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var created struct {
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	// creator browser deletes without a token: allowed (#37 /mine delete button)
 	rec = doReq(t, h, "DELETE", "/api/pastes/"+created.ID, "creator-abc", "")
 	if rec.Code != 200 {
 		t.Fatalf("creator delete: got %d want 200", rec.Code)
 	}
 	// a different browser is still forbidden
 	id, _ := createTestPaste(t, h)
 	rec = doReq(t, h, "DELETE", "/api/pastes/"+id, "someone-else", "")
 	if rec.Code != http.StatusForbidden {
 		t.Fatalf("other browser delete: got %d want 403", rec.Code)
 	}
 	if !pasteExists(t, h, id) {
 		t.Fatal("paste deleted by unrelated browser")
 	}
 }
 func TestDeletionAuthorizationExtract(t *testing.T) {
 	mk := func(hdr, q string) *http.Request {
 		req := httptest.NewRequest("DELETE", "/api/pastes/x"+q, nil)
 		if hdr != "" {
 			req.Header.Set("Authorization", hdr)
 		}
 		return req
 	}
 	cases := []struct {
 		hdr, q, want string
 	}{
 		{"", "", ""},
 		{"Bearer tok", "", "tok"},
 		{"bearer tok", "", "tok"},
 		{"Token tok", "", "tok"},
 		{"tok", "", "tok"},
 		{"", "?token=q", "q"},
 		{"Bearer hdr", "?token=q", "hdr"}, // header wins
 	}
 	for _, c := range cases {
 		if got := deletionAuthorization(mk(c.hdr, c.q)); got != c.want {
 			t.Errorf("deletionAuthorization(hdr=%q q=%q) = %q want %q", c.hdr, c.q, got, c.want)
 		}
 	}
 }
@@ -1,123 +0,0 @@
 package api
 import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 )
 // #105: every validation path on create returns a machine-readable `code`
 // alongside the human `error` message, so the new-page JS can map known
 // codes to plain-language guidance.
 func decodeErr(t *testing.T, rec *httptest.ResponseRecorder) (status int, errMsg, code string) {
 	t.Helper()
 	var got struct {
 		Error string `json:"error"`
 		Code  string `json:"code"`
 	}
 	if err := json.Unmarshal(rec.Body.Bytes(), &got); err != nil {
 		t.Fatalf("bad json: %v (%s)", err, rec.Body.String())
 	}
 	return rec.Code, got.Error, got.Code
 }
 func postCreate(h http.Handler, body string) *httptest.ResponseRecorder {
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(body))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	return rec
 }
 func TestErrorCodeContentEmpty(t *testing.T) {
 	h := testServer(t).routes()
 	_, _, code := decodeErr(t, postCreate(h, `{"content":"   "}`))
 	if code != "content_empty" {
 		t.Fatalf("code = %q, want content_empty", code)
 	}
 }
 func TestErrorCodeContentTooLarge(t *testing.T) {
 	h := testServer(t).routes()
 	big := strings.Repeat("x", 6*1024*1024) // over the 5MB test cap
 	_, _, code := decodeErr(t, postCreate(h, `{"content":"`+big+`"}`))
 	if code != "content_too_large" {
 		t.Fatalf("code = %q, want content_too_large", code)
 	}
 }
 func TestErrorCodeSlugTaken(t *testing.T) {
 	h := testServer(t).routes()
 	if rec := postCreate(h, `{"content":"a","custom_slug":"taken-slug"}`); rec.Code != 201 {
 		t.Fatalf("seed create: %d %s", rec.Code, rec.Body.String())
 	}
 	_, _, code := decodeErr(t, postCreate(h, `{"content":"b","custom_slug":"taken-slug"}`))
 	if code != "slug_taken" {
 		t.Fatalf("code = %q, want slug_taken", code)
 	}
 }
 func TestErrorCodeSlugInvalid(t *testing.T) {
 	h := testServer(t).routes()
 	_, _, code := decodeErr(t, postCreate(h, `{"content":"a","custom_slug":"bad slug!"}`))
 	if code != "slug_invalid" {
 		t.Fatalf("code = %q, want slug_invalid", code)
 	}
 }
 func TestErrorCodeExpiryInvalid(t *testing.T) {
 	h := testServer(t).routes()
 	_, _, code := decodeErr(t, postCreate(h, `{"content":"a","expires_in":"2s"}`))
 	if code != "expiry_invalid" {
 		t.Fatalf("code = %q, want expiry_invalid", code)
 	}
 }
 func TestErrorCodeRateLimited(t *testing.T) {
 	h := testServer(t).routes()
 	var code string
 	for i := 0; i < 20; i++ {
 		_, _, code = decodeErr(t, postCreate(h, `{"content":"a"}`))
 		if code == "rate_limited" {
 			return
 		}
 	}
 	t.Fatalf("never got rate_limited, last code = %q", code)
 }
 func TestErrorCodeCanValidation(t *testing.T) {
 	h := testServer(t).routes()
 	post := func(fields map[string]string) *httptest.ResponseRecorder {
 		var b strings.Builder
 		for k, v := range fields {
 			b.WriteString("--B\r\nContent-Disposition: form-data; name=\"" + k + "\"\r\n\r\n" + v + "\r\n")
 		}
 		b.WriteString("--B--\r\n")
 		req := httptest.NewRequest("POST", "/api/pastes/can", strings.NewReader(b.String()))
 		req.Header.Set("Content-Type", "multipart/form-data; boundary=B")
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		return rec
 	}
 	// bad visibility
 	if _, _, code := decodeErr(t, post(map[string]string{"title": "x", "visibility": "nope"})); code != "invalid_visibility" {
 		t.Fatalf("visibility code = %q, want invalid_visibility", code)
 	}
 	// invalid expiry
 	if _, _, code := decodeErr(t, post(map[string]string{"title": "x", "expires_in": "1s"})); code != "expiry_invalid" {
 		t.Fatalf("expiry code = %q, want expiry_invalid", code)
 	}
 	// slug taken on can create
 	if rec := postCreate(h, `{"content":"a","custom_slug":"can-slug"}`); rec.Code != 201 {
 		t.Fatalf("seed create: %d", rec.Code)
 	}
 	if _, _, code := decodeErr(t, post(map[string]string{"title": "x", "custom_slug": "can-slug", "json_items": `[{"title":"a","content":"b"}]`})); code != "slug_taken" {
 		t.Fatalf("can slug code = %q, want slug_taken", code)
 	}
 }
@@ -1,198 +0,0 @@
 package api
 // Regression tests for #68 input-validation gaps: negative/oversized content
 // lengths (413), limit=0 → default page size, unchecked query params
 // (negative offset), and negative burn_after_reads.
 import (
 	"encoding/json"
 	"fmt"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 )
 func createPasteRaw(t *testing.T, h http.Handler, body string) *httptest.ResponseRecorder {
 	t.Helper()
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(body))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	return rec
 }
 // A request whose decoded content exceeds the admin-tunable cap is rejected
 // with 413 and a clear message (content under the body cap, over the
 // content cap).
 func TestCreatePasteContentOverCap413(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	// content over MaxContentBytes (5MiB) but under body cap (+4KiB): send
 	// just over the content cap so the per-field check fires first.
 	content := strings.Repeat("a", 5*1024*1024+10)
 	rec := createPasteRaw(t, h, fmt.Sprintf(`{"content":"%s"}`, content))
 	if rec.Code != http.StatusRequestEntityTooLarge {
 		t.Fatalf("got %d want 413: %s", rec.Code, rec.Body.String())
 	}
 	if !strings.Contains(rec.Body.String(), "content exceeds max") {
 		t.Fatalf("unclear error message: %s", rec.Body.String())
 	}
 }
 // A request whose entire body is larger than the server-side body cap is cut
 // off by http.MaxBytesReader and answered with 413, not decoded into memory
 // (#68: previously a giant body was fully buffered, then rejected only at
 // the per-field check — actually the decode happened before any check).
 func TestCreatePasteBodyOverCap413(t *testing.T) {
 	s := testServer(t)
 	// shrink the content cap so the body cap is small too
 	ss := s.settings.get()
 	ss.MaxContentBytes = 64 * 1024
 	if err := s.settings.set(ss); err != nil {
 		t.Fatal(err)
 	}
 	h := s.routes()
 	content := strings.Repeat("a", 200*1024) // 200KiB > 64KiB+4KiB body cap
 	rec := createPasteRaw(t, h, fmt.Sprintf(`{"content":"%s","title":"x"}`, content))
 	if rec.Code != http.StatusRequestEntityTooLarge {
 		t.Fatalf("got %d want 413: %s", rec.Code, rec.Body.String())
 	}
 }
 // Negative content lengths cannot be expressed via JSON, but a negative
 // expires-style numeric payload must not crash; more importantly the
 // burn_after_reads field: negative values are rejected with a clear message.
 func TestCreatePasteNegativeBurnAfterReads(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	rec := createPasteRaw(t, h, `{"content":"hi","burn_after_reads":-5}`)
 	if rec.Code != http.StatusBadRequest {
 		t.Fatalf("got %d want 400: %s", rec.Code, rec.Body.String())
 	}
 	if !strings.Contains(rec.Body.String(), "burn_after_reads") {
 		t.Fatalf("unclear error message: %s", rec.Body.String())
 	}
 	// 0 and positive values still work (0 = default single read, per #49)
 	rec = createPasteRaw(t, h, `{"content":"hi","burn_after_reads":0,"burn_after_read":true}`)
 	if rec.Code != http.StatusCreated {
 		t.Fatalf("zero burn_after_reads: got %d want 201: %s", rec.Code, rec.Body.String())
 	}
 }
 // limit=0 on list endpoints returns the default page size (existing clamp
 // treats <=0 as default; #68 asks this be explicit and tested).
 func TestListLimitZeroUsesDefault(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	// seed 3 public pastes
 	for i := 0; i < 3; i++ {
 		rec := createPasteRaw(t, h, fmt.Sprintf(`{"content":"p%d"}`, i))
 		if rec.Code != 201 {
 			t.Fatalf("seed: got %d: %s", rec.Code, rec.Body.String())
 		}
 	}
 	for _, q := range []string{"/api/public?limit=0", "/api/public"} {
 		req := httptest.NewRequest("GET", q, nil)
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		if rec.Code != 200 {
 			t.Fatalf("%s: got %d", q, rec.Code)
 		}
 		var got struct {
 			Limit int                   `json:"limit"`
 			Total int                   `json:"total"`
 			Items []struct{ ID string } `json:"items"`
 		}
 		json.Unmarshal(rec.Body.Bytes(), &got)
 		if got.Limit != 25 || len(got.Items) != 3 {
 			t.Fatalf("%s: limit=%d items=%d, want limit 25 and all 3 items", q, got.Limit, len(got.Items))
 		}
 	}
 }
 // Huge limit values are clamped to the max page size (already the behavior;
 // regression-tested here per #68 "validate unchecked params").
 func TestListLimitHugeClamped(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	req := httptest.NewRequest("GET", "/api/public?limit=999999999", nil)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var got struct {
 		Limit int `json:"limit"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &got)
 	if got.Limit != 25 {
 		t.Fatalf("limit=%d, want clamped to 25", got.Limit)
 	}
 }
 // Negative offset previously passed through unchecked to SQL (harmless in
 // SQLite, but invalid); it must be clamped to 0 (#68).
 func TestListNegativeOffsetClamped(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	for i := 0; i < 2; i++ {
 		rec := createPasteRaw(t, h, fmt.Sprintf(`{"content":"p%d"}`, i))
 		if rec.Code != 201 {
 			t.Fatalf("seed: got %d", rec.Code)
 		}
 	}
 	req := httptest.NewRequest("GET", "/api/public?offset=-999", nil)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("got %d", rec.Code)
 	}
 	var got struct {
 		Offset int `json:"offset"`
 		Total  int `json:"total"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &got)
 	if got.Offset != 0 || got.Total != 2 {
 		t.Fatalf("offset=%d total=%d, want offset 0 and total 2", got.Offset, got.Total)
 	}
 	// /api/mine too (needs the viewer cookie)
 	req = httptest.NewRequest("GET", "/api/mine?offset=-5", nil)
 	req.AddCookie(&http.Cookie{Name: "vwr", Value: "offclamp"})
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var mine struct {
 		Offset int `json:"offset"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &mine)
 	if mine.Offset != 0 {
 		t.Fatalf("mine offset=%d, want 0", mine.Offset)
 	}
 }
 // Non-numeric limit/offset fall back to defaults instead of 500s.
 func TestListGarbageParams(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	req := httptest.NewRequest("GET", "/api/public?limit=abc&offset=xyz", nil)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("got %d", rec.Code)
 	}
 	var got struct {
 		Limit  int `json:"limit"`
 		Offset int `json:"offset"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &got)
 	if got.Limit != 25 || got.Offset != 0 {
 		t.Fatalf("limit=%d offset=%d, want 25/0", got.Limit, got.Offset)
 	}
 }
@@ -1,92 +0,0 @@
 package api
 // #81: ALL password verification attempts (GET query param, header, POST
 // form) must go through the per-IP unlock limiter. Regression: N wrong
 // passwords via GET ?password= must eventually yield 429.
 import (
 	"encoding/json"
 	"net/http/httptest"
 	"strings"
 	"testing"
 )
 func createPasswordPaste(t *testing.T, s *apiServer, pw string) string {
 	t.Helper()
 	h := s.routes()
 	body := `{"content":"secret","password":"` + pw + `"}`
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(body))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	var created struct {
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	return created.ID
 }
 // TestRateLimitGetPasswordQuery: repeated wrong passwords via GET
 // ?password= must eventually return 429 (unlock limiter: burst 5).
 func TestRateLimitGetPasswordQuery(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	id := createPasswordPaste(t, s, "hunter2")
 	var saw429 bool
 	// more attempts than the unlock burst (5)
 	for i := 0; i < 10; i++ {
 		req := httptest.NewRequest("GET", "/api/pastes/"+id+"?password=wrong"+string(rune('a'+i)), nil)
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		if rec.Code == 429 {
 			saw429 = true
 			break
 		}
 		if rec.Code != 401 {
 			t.Fatalf("attempt %d: expected 401 before limit, got %d", i, rec.Code)
 		}
 	}
 	if !saw429 {
 		t.Fatal("expected 429 after repeated wrong ?password= attempts, never got one")
 	}
 }
 // TestRateLimitGetPasswordHeader: same guarantee for the X-Paste-Password header path.
 func TestRateLimitGetPasswordHeader(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	id := createPasswordPaste(t, s, "hunter2")
 	var saw429 bool
 	for i := 0; i < 10; i++ {
 		req := httptest.NewRequest("GET", "/api/pastes/"+id, nil)
 		req.Header.Set("X-Paste-Password", "wrong"+string(rune('a'+i)))
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		if rec.Code == 429 {
 			saw429 = true
 			break
 		}
 		if rec.Code != 401 {
 			t.Fatalf("attempt %d: expected 401 before limit, got %d", i, rec.Code)
 		}
 	}
 	if !saw429 {
 		t.Fatal("expected 429 after repeated wrong header password attempts, never got one")
 	}
 }
 // TestRateLimitGetPasswordCorrectStillAllowed: a correct password must still
 // work within the burst (the limiter gates attempts, not correctness).
 func TestRateLimitGetPasswordCorrectStillAllowed(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	id := createPasswordPaste(t, s, "hunter2")
 	req := httptest.NewRequest("GET", "/api/pastes/"+id+"?password=hunter2", nil)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("expected 200 for correct password within burst, got %d", rec.Code)
 	}
 }
@@ -1,152 +0,0 @@
 package api
 // Regression tests for #86: title and language are bounded at create time.
 // Titles over 200 chars are truncated; language must match
 // ^[a-zA-Z0-9+#-]{1,40}$ or the create is rejected with a clear 400.
 import (
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 )
 // pasteMeta fetches a created paste's stored metadata via the API.
 func pasteMeta(t *testing.T, h http.Handler, id string) map[string]any {
 	t.Helper()
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, httptest.NewRequest("GET", "/api/pastes/"+id, nil))
 	if rec.Code != 200 {
 		t.Fatalf("get paste %s: got %d: %s", id, rec.Code, rec.Body.String())
 	}
 	var m map[string]any
 	if err := json.Unmarshal(rec.Body.Bytes(), &m); err != nil {
 		t.Fatal(err)
 	}
 	return m
 }
 // A 5000-char title is truncated to 200 characters at create time (#86).
 func TestCreatePasteTitleTruncated(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	title := strings.Repeat("t", 5000)
 	body, _ := json.Marshal(map[string]any{"content": "hi", "title": title})
 	rec := createPasteRaw(t, h, string(body))
 	if rec.Code != http.StatusCreated {
 		t.Fatalf("got %d want 201: %s", rec.Code, rec.Body.String())
 	}
 	var resp struct {
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &resp)
 	meta := pasteMeta(t, h, resp.ID)
 	got, _ := meta["title"].(string)
 	if got != strings.Repeat("t", 200) {
 		t.Fatalf("title not truncated to 200 chars: len=%d", len(got))
 	}
 }
 // A title within the 200-char bound is stored verbatim (minus surrounding
 // whitespace, which is trimmed).
 func TestCreatePasteTitleWithinBoundKept(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	title := "  " + strings.Repeat("x", 200) + "  "
 	body, _ := json.Marshal(map[string]any{"content": "hi", "title": title})
 	rec := createPasteRaw(t, h, string(body))
 	if rec.Code != http.StatusCreated {
 		t.Fatalf("got %d want 201: %s", rec.Code, rec.Body.String())
 	}
 	var resp struct {
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &resp)
 	meta := pasteMeta(t, h, resp.ID)
 	if got, _ := meta["title"].(string); got != strings.Repeat("x", 200) {
 		t.Fatalf("title changed unexpectedly: len=%d", len(got))
 	}
 }
 // A language longer than 40 chars is rejected with a clear 400 (#86).
 func TestCreatePasteLanguageTooLong400(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	body, _ := json.Marshal(map[string]any{"content": "hi", "language": strings.Repeat("a", 41)})
 	rec := createPasteRaw(t, h, string(body))
 	if rec.Code != http.StatusBadRequest {
 		t.Fatalf("got %d want 400: %s", rec.Code, rec.Body.String())
 	}
 	if !strings.Contains(rec.Body.String(), "language") {
 		t.Fatalf("unclear error message: %s", rec.Body.String())
 	}
 }
 // Language strings outside ^[a-zA-Z0-9+#-]{1,40}$ are rejected with 400.
 func TestCreatePasteLanguageBadFormat400(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	for _, bad := range []string{
 		"<img src=x onerror=alert(1)>",
 		"java script",
 		"c++ extra!",
 		"py_thon",
 		"go.lang",
 	} {
 		body, _ := json.Marshal(map[string]any{"content": "hi", "language": bad})
 		rec := createPasteRaw(t, h, string(body))
 		if rec.Code != http.StatusBadRequest {
 			t.Errorf("language %q: got %d want 400: %s", bad, rec.Code, rec.Body.String())
 			continue
 		}
 		if !strings.Contains(rec.Body.String(), "language must match") {
 			t.Errorf("language %q: unclear error: %s", bad, rec.Body.String())
 		}
 	}
 }
 // Valid languages (letters, digits, #, +, -) within 40 chars are accepted.
 func TestCreatePasteLanguageValidAccepted(t *testing.T) {
 	for _, ok := range []string{"go", "c#", "f#", "c++", "objective-c", "ECMAScript-2023", strings.Repeat("a", 40)} {
 		s2 := testServer(t) // fresh rate limiter per case
 		h2 := s2.routes()
 		body, _ := json.Marshal(map[string]any{"content": "hi", "language": ok})
 		rec := createPasteRaw(t, h2, string(body))
 		if rec.Code != http.StatusCreated {
 			t.Errorf("language %q: got %d want 201: %s", ok, rec.Code, rec.Body.String())
 		}
 	}
 }
 // An absent or blank language still creates fine and stores NULL, and a
 // blank title is stored NULL rather than an empty string.
 func TestCreatePasteBlankMetadataOK(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	for _, body := range []string{
 		`{"content":"hi"}`,
 		`{"content":"hi","language":"","title":"  "}`,
 	} {
 		rec := createPasteRaw(t, h, body)
 		if rec.Code != http.StatusCreated {
 			t.Fatalf("body %s: got %d want 201: %s", body, rec.Code, rec.Body.String())
 		}
 		var resp struct {
 			ID string `json:"id"`
 		}
 		json.Unmarshal(rec.Body.Bytes(), &resp)
 		meta := pasteMeta(t, h, resp.ID)
 		if lang, ok := meta["language"]; ok && lang != nil && lang != "" {
 			t.Fatalf("body %s: language not null: %v", body, lang)
 		}
 		if title, ok := meta["title"]; ok && title != nil && title != "" {
 			t.Fatalf("body %s: title not null: %v", body, title)
 		}
 	}
 }
@@ -42,9 +42,7 @@ func TestCreateAndGetPaste(t *testing.T) {
 	if rec.Code != 201 {
 		t.Fatalf("create: got %d want 201: %s", rec.Code, rec.Body.String())
 	}
-	var created struct {
+	var created struct{ ID string `json:"id"` }
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	if len(created.ID) != 6 {
 		t.Fatalf("unexpected id: %q", created.ID)
@@ -75,9 +73,7 @@ func TestPasswordProtection(t *testing.T) {
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(body))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
-	var created struct {
+	var created struct{ ID string `json:"id"` }
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	// without password -> 401
@@ -137,14 +133,10 @@ func TestSoftDelete(t *testing.T) {
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"bye"}`))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
-	var created struct {
+	var created struct{ ID string `json:"id"` }
 		ID            string `json:"id"`
 		DeletionToken string `json:"deletion_token"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	req = httptest.NewRequest("DELETE", "/api/pastes/"+created.ID, nil)
 	req.Header.Set("Authorization", "Bearer "+created.DeletionToken)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
@@ -183,46 +175,6 @@ func TestListPublicExcludesUnlisted(t *testing.T) {
 	}
 }
 func TestListPublicExcludesPasswordAndUnlisted(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	bodies := []string{
 		`{"content":"open","visibility":"public"}`,
 		`{"content":"locked","visibility":"public","password":"hunter2"}`,
 		`{"content":"hidden","visibility":"unlisted"}`,
 	}
 	for _, body := range bodies {
 		req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(body))
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		if rec.Code != 201 {
 			t.Fatalf("create %s: got %d", body, rec.Code)
 		}
 	}
 	req := httptest.NewRequest("GET", "/api/public", nil)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("list public: got %d", rec.Code)
 	}
 	var resp struct {
 		Total int              `json:"total"`
 		Items []map[string]any `json:"items"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &resp)
 	if resp.Total != 1 || len(resp.Items) != 1 {
 		t.Fatalf("expected only the 1 public paste, got total=%d items=%d", resp.Total, len(resp.Items))
 	}
 	// password-protected and unlisted pastes must not appear (no metadata leak)
 	for _, secret := range []string{"hunter2", "locked", "hidden"} {
 		if strings.Contains(rec.Body.String(), secret) {
 			t.Fatalf("leaked %q in /api/public response", secret)
 		}
 	}
 }
 func TestSweepSoftDeletesAfterGrace(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
@@ -230,9 +182,7 @@ func TestSweepSoftDeletesAfterGrace(t *testing.T) {
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"gone soon"}`))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
-	var created struct {
+	var created struct{ ID string `json:"id"` }
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	s.store.SoftDelete(created.ID)
@@ -268,9 +218,7 @@ func TestRawEndpoint(t *testing.T) {
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"raw content here"}`))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
-	var created struct {
+	var created struct{ ID string `json:"id"` }
 		ID string `json:"id"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &created)
 	req = httptest.NewRequest("GET", "/raw/"+created.ID, nil)
@@ -1,97 +0,0 @@
 package api
 // #83 regression tests: `public` boolean in the create payload must map to
 // visibility (false -> unlisted, true -> public); string `visibility` still works.
 import (
 	"encoding/json"
 	"net/http/httptest"
 	"strings"
 	"testing"
 )
 func createPasteBody(t *testing.T, h *apiServer, body string) map[string]any {
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(body))
 	rec := httptest.NewRecorder()
 	h.routes().ServeHTTP(rec, req)
 	if rec.Code != 201 {
 		t.Fatalf("create: got %d: %s", rec.Code, rec.Body.String())
 	}
 	var resp map[string]any
 	if err := json.Unmarshal(rec.Body.Bytes(), &resp); err != nil {
 		t.Fatalf("bad json: %v", err)
 	}
 	return resp
 }
 func getVis(t *testing.T, h *apiServer, id string) string {
 	req := httptest.NewRequest("GET", "/api/pastes/"+id, nil)
 	rec := httptest.NewRecorder()
 	h.routes().ServeHTTP(rec, req)
 	if rec.Code != 200 {
 		t.Fatalf("get %s: got %d", id, rec.Code)
 	}
 	var resp struct {
 		Visibility string `json:"visibility"`
 	}
 	if err := json.Unmarshal(rec.Body.Bytes(), &resp); err != nil {
 		t.Fatalf("bad json: %v", err)
 	}
 	return resp.Visibility
 }
 // TestPublicBooleanFalseMapsToUnlisted: {"public": false} must create an unlisted paste.
 func TestPublicBooleanFalseMapsToUnlisted(t *testing.T) {
 	s := testServer(t)
 	resp := createPasteBody(t, s, `{"content":"x","public":false}`)
 	if v := getVis(t, s, resp["id"].(string)); v != "unlisted" {
 		t.Fatalf("public:false -> got visibility %q, want unlisted", v)
 	}
 }
 // TestPublicBooleanTrueMapsToPublic: {"public": true} must create a public paste.
 func TestPublicBooleanTrueMapsToPublic(t *testing.T) {
 	s := testServer(t)
 	resp := createPasteBody(t, s, `{"content":"x","public":true}`)
 	if v := getVis(t, s, resp["id"].(string)); v != "public" {
 		t.Fatalf("public:true -> got visibility %q, want public", v)
 	}
 }
 // TestPublicBooleanOverridesString: boolean wins when both fields are sent.
 func TestPublicBooleanOverridesString(t *testing.T) {
 	s := testServer(t)
 	resp := createPasteBody(t, s, `{"content":"x","visibility":"public","public":false}`)
 	if v := getVis(t, s, resp["id"].(string)); v != "unlisted" {
 		t.Fatalf("boolean override -> got %q, want unlisted", v)
 	}
 }
 // TestVisibilityStringStillWorks: existing string contract unchanged.
 func TestVisibilityStringStillWorks(t *testing.T) {
 	s := testServer(t)
 	resp := createPasteBody(t, s, `{"content":"x","visibility":"unlisted"}`)
 	if v := getVis(t, s, resp["id"].(string)); v != "unlisted" {
 		t.Fatalf("string field -> got %q, want unlisted", v)
 	}
 	resp = createPasteBody(t, s, `{"content":"y","visibility":"public"}`)
 	if v := getVis(t, s, resp["id"].(string)); v != "public" {
 		t.Fatalf("string field -> got %q, want public", v)
 	}
 }
 // TestPublicListExcludesPublicFalse: {"public":false} pastes stay out of /api/public.
 func TestPublicListExcludesPublicFalse(t *testing.T) {
 	s := testServer(t)
 	createPasteBody(t, s, `{"content":"hidden","public":false}`)
 	req := httptest.NewRequest("GET", "/api/public", nil)
 	rec := httptest.NewRecorder()
 	s.routes().ServeHTTP(rec, req)
 	var resp struct {
 		Total int `json:"total"`
 	}
 	json.Unmarshal(rec.Body.Bytes(), &resp)
 	if resp.Total != 0 {
 		t.Fatalf("public:false paste leaked into /api/public: total=%d", resp.Total)
 	}
 }
@@ -48,28 +48,8 @@ func (l *limiter) allow(key string, rate, burst float64) bool {
 	return true
 }
-// clientIP extracts the client IP for rate-limit keying (#85).
+// clientIP extracts the request IP (no reverse proxy header by default).
 //
 // Trust boundary: palette runs behind exactly ONE trusted reverse proxy
 // (Traefik in the k3s pod network). Traefik APPENDS the real client IP to
 // X-Forwarded-For, so the RIGHTMOST entry is the last value the trusted
 // proxy observed and is unspoofable by the client (a client-supplied fake
 // entry only lands on the LEFT and is ignored). This matches chi's
 // middleware.RealIP semantics for a single trusted proxy hop.
 //
 // Direct connections (no XFF header) fall back to RemoteAddr. Directly
 // reachable deployments must NOT expose the app to untrusted networks
 // without a proxy in front, or attackers could forge the rightmost entry.
 func clientIP(r *http.Request) string {
 	if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
 		if i := strings.LastIndex(xff, ","); i >= 0 {
 			return strings.TrimSpace(xff[i+1:])
 		}
 		return strings.TrimSpace(xff)
 	}
 	if xr := r.Header.Get("X-Real-Ip"); xr != "" {
 		return strings.TrimSpace(xr)
 	}
 	host := r.RemoteAddr
 	if i := strings.LastIndex(host, ":"); i > 0 {
 		host = host[:i]
@@ -104,16 +84,10 @@ func rateLimitUnlock(id string, r *http.Request) bool {
 	return globalLimiter.allow("unlock:"+id+":"+clientIP(r), 5.0/60.0, 5)
 }
 // rateLimitAdmin: 5 attempts per minute per IP on the admin key check (#66),
 // same pattern as the unlock limiter (#34).
 func rateLimitAdmin(r *http.Request) bool {
 	return globalLimiter.allow("admin:"+clientIP(r), 5.0/60.0, 5)
 }
 // writeRateLimited responds 429 with Retry-After based on refill rate.
 func writeRateLimited(w http.ResponseWriter, retryAfterSecs int) {
 	w.Header().Set("Retry-After", strconv.Itoa(retryAfterSecs))
-	writeErrCode(w, 429, "rate_limited", "rate limit exceeded")
+	writeErr(w, 429, "rate limit exceeded")
 }
 // setRateLimitHeaders sets informational X-RateLimit headers for create/guess.
@@ -1,85 +0,0 @@
 package api
 // Issue #85: the rate limit key must use the rightmost X-Forwarded-For entry
 // (appended by the trusted Traefik proxy), never the raw/leftmost header
 // value a client can forge. A spoofed FIRST XFF entry must not bypass the
 // limit or rotate buckets.
 import (
 	"bytes"
 	"net/http/httptest"
 	"testing"
 )
 func TestClientIPTakesRightmostXFF(t *testing.T) {
 	r := httptest.NewRequest("POST", "/", nil)
 	r.RemoteAddr = "10.42.0.7:51000" // trusted Traefik pod
 	r.Header.Set("X-Forwarded-For", "1.2.3.4, 1.2.3.5, 203.0.113.9")
 	if got := clientIP(r); got != "203.0.113.9" {
 		t.Fatalf("clientIP = %q, want rightmost 203.0.113.9", got)
 	}
 }
 func TestClientIPXRealIPFallback(t *testing.T) {
 	r := httptest.NewRequest("POST", "/", nil)
 	r.RemoteAddr = "10.42.0.7:51000"
 	r.Header.Set("X-Real-Ip", "203.0.113.10")
 	if got := clientIP(r); got != "203.0.113.10" {
 		t.Fatalf("clientIP = %q, want 203.0.113.10", got)
 	}
 }
 func TestClientIPDirectFallback(t *testing.T) {
 	r := httptest.NewRequest("POST", "/", nil)
 	r.RemoteAddr = "198.51.100.5:51000"
 	if got := clientIP(r); got != "198.51.100.5" {
 		t.Fatalf("clientIP = %q, want 198.51.100.5", got)
 	}
 }
 // TestRateLimitSpoofedFirstXFFDoesNotBypass: an attacker rotating a fake
 // leftmost XFF entry stays limited on their real (rightmost) IP.
 func TestRateLimitSpoofedFirstXFFDoesNotBypass(t *testing.T) {
 	srv := newTestServer(t)
 	h := srv.routes()
 	for i := 0; i < 5; i++ {
 		req := httptest.NewRequest("POST", "/api/pastes", bytes.NewReader([]byte(`{"content":"hi"}`)))
 		req.RemoteAddr = "10.42.0.7:51000"
 		// each request spoofs a DIFFERENT leftmost entry
 		req.Header.Set("X-Forwarded-For", spoofN(i)+", 203.0.113.9")
 		rr := httptest.NewRecorder()
 		h.ServeHTTP(rr, req)
 		if rr.Code != 201 {
 			t.Fatalf("req %d: want 201, got %d", i, rr.Code)
 		}
 	}
 	// 6th request, still the same real IP, new spoofed prefix: must 429
 	req := httptest.NewRequest("POST", "/api/pastes", bytes.NewReader([]byte(`{"content":"hi"}`)))
 	req.RemoteAddr = "10.42.0.7:51000"
 	req.Header.Set("X-Forwarded-For", "9.9.9.9, 203.0.113.9")
 	rr := httptest.NewRecorder()
 	h.ServeHTTP(rr, req)
 	if rr.Code != 429 {
 		t.Fatalf("spoofed 6th req: want 429, got %d", rr.Code)
 	}
 }
 func spoofN(i int) string {
 	return "1.2.3." + string(rune('0'+i))
 }
 // Distinct real IPs must still get distinct buckets (no over-limiting).
 func TestRateLimitDistinctRightmostIPsIndependent(t *testing.T) {
 	srv := newTestServer(t)
 	h := srv.routes()
 	for _, ip := range []string{"203.0.113.20", "203.0.113.21"} {
 		req := httptest.NewRequest("POST", "/api/pastes", bytes.NewReader([]byte(`{"content":"hi"}`)))
 		req.RemoteAddr = "10.42.0.7:51000"
 		req.Header.Set("X-Forwarded-For", "6.6.6.6, "+ip)
 		rr := httptest.NewRecorder()
 		h.ServeHTTP(rr, req)
 		if rr.Code != 201 {
 			t.Fatalf("ip %s: want 201, got %d", ip, rr.Code)
 		}
 	}
 }
@@ -4,11 +4,8 @@ package api
 import (
 	"context"
 	"database/sql"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"html/template"
 	"net/http"
 	"os"
 	"strconv"
@@ -18,7 +15,8 @@ import (
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/chi/v5/middleware"
-	langpkg "palette/internal/lang"
+	"database/sql"
 	"palette/internal/store"
 	"palette/internal/web"
 )
@@ -52,30 +50,6 @@ func writeErr(w http.ResponseWriter, status int, msg string) {
 	writeJSON(w, status, map[string]string{"error": msg})
 }
 // writeErrCode emits a JSON error with a machine-readable code (#105): the
 // new-page JS maps known codes to plain-language messages, API consumers get
 // the stable `code` field alongside the human `error` text.
 func writeErrCode(w http.ResponseWriter, status int, code, msg string) {
 	writeJSON(w, status, map[string]string{"error": msg, "code": code})
 }
 // createErrCode maps a store.CreatePaste/CreateCan error to its UI error
 // code (#105).
 func createErrCode(err error) string {
 	switch {
 	case errors.Is(err, store.ErrSlugTaken):
 		return "slug_taken"
 	case errors.Is(err, store.ErrReservedSlug):
 		return "slug_reserved"
 	case errors.Is(err, store.ErrInvalidSlug):
 		return "slug_invalid"
 	case strings.Contains(err.Error(), "expires_in"):
 		return "expiry_invalid"
 	default:
 		return "invalid_request"
 	}
 }
 // Routes returns the HTTP handler for the server.
 func (a *apiServer) Routes() http.Handler {
 	return a.routes()
@@ -85,9 +59,7 @@ func (a *apiServer) routes() http.Handler {
 	r := chi.NewRouter()
 	r.Use(middleware.Recoverer)
 	r.Use(middleware.Timeout(30 * time.Second))
 	r.Use(a.limitRequestBody) // #68: hard server-side body cap -> 413
 	r.Use(viewerCookieMiddleware)
 	r.Use(web.SecurityHeaders) // #59: CSP + hardening headers on HTML pages
 	// admin (#40): HTML page is open (key entry via form); API is key-guarded
 	r.Get("/admin", a.ui.Handlers().HandleAdminPage)
@@ -105,13 +77,11 @@ func (a *apiServer) routes() http.Handler {
 		r.Post("/guess-language", a.handleGuessLang)
 		r.Post("/pastes/can", a.handleCreateCan)
 		r.Get("/cans/{id}", a.handleGetCan)
 		r.Delete("/cans/{id}", a.handleDeleteCan)
 		r.Get("/cans/{id}/items/{item}", a.handleCanItem)
 	})
-	// can page (#4): GET renders, POST unlocks (same flow as pastes)
+	// can page
 	r.Get("/can/{id}", a.handleCanPage)
 	r.Post("/can/{id}", a.handleCanPage)
 	// raw
 	r.Get("/raw/{id}", a.handleRaw)
@@ -182,48 +152,17 @@ func (a *apiServer) handleCreatePaste(w http.ResponseWriter, r *http.Request) {
 	}
 	var p store.Paste
 	if err := json.NewDecoder(r.Body).Decode(&p); err != nil {
 		if isBodyTooLarge(err) { // #68: body cut off by MaxBytesReader
 			writeErrCode(w, http.StatusRequestEntityTooLarge, "content_too_large", "request body too large")
 			return
 		}
 		writeErr(w, 400, "invalid json body")
 		return
 	}
-	if status, msg := checkContent(p.Content, s.MaxContentBytes); status != 0 {
+	if strings.TrimSpace(p.Content) == "" {
-		if status == http.StatusRequestEntityTooLarge {
+		writeErr(w, 400, "content is required")
 			writeErrCode(w, status, "content_too_large", msg)
 		} else {
 			writeErrCode(w, status, "content_empty", msg)
 		}
 		return
 	}
-	// #86: bound free-form metadata at create time
+	if int64(len(p.Content)) > s.MaxContentBytes { // #40: admin-tunable
-	if p.Title != nil {
+		writeErr(w, 413, fmt.Sprintf("content exceeds max %d bytes", s.MaxContentBytes))
 		t, err := checkTitle(*p.Title)
 		if err != nil {
 			writeErr(w, 400, err.Error())
 		return
 	}
 		p.Title = &t
 	}
 	if p.Language != nil {
 		l, err := checkLanguage(*p.Language)
 		if err != nil {
 			writeErr(w, 400, err.Error())
 			return
 		}
 		if l == "" {
 			p.Language = nil
 		} else {
 			p.Language = &l
 		}
 	}
 	if p.BurnAfterReads != nil { // #68: reject negative read budgets
 		if err := parseBurnAfterReads(*p.BurnAfterReads); err != nil {
 			writeErr(w, 400, err.Error())
 			return
 		}
 	}
 	// #40: admin-configurable default expiry
 	if (p.ExpiresIn == nil || *p.ExpiresIn == "") && s.DefaultExpiry != "" {
 		def := s.DefaultExpiry
@@ -232,7 +171,7 @@ func (a *apiServer) handleCreatePaste(w http.ResponseWriter, r *http.Request) {
 	p.ViewerID = currentViewerID(r)
 	created, err := a.store.CreatePaste(&p)
 	if err != nil {
-		writeErrCode(w, 400, createErrCode(err), err.Error())
+		writeErr(w, 400, err.Error())
 		return
 	}
 	writeJSON(w, 201, map[string]any{
@@ -267,13 +206,6 @@ func (a *apiServer) handleGetPaste(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if row.PasswordHash.Valid {
 		// #81: every password verification (header, query param, or empty)
 		// goes through the same per-IP+paste unlock limiter as the POST form
 		// path, so brute-force via GET ?password= or X-Paste-Password gets 429.
 		if !rateLimitUnlock(row.ID, r) {
 			writeRateLimited(w, 60)
 			return
 		}
 		// require password via header or query
 		pw := r.Header.Get("X-Paste-Password")
 		if pw == "" {
@@ -284,12 +216,7 @@ func (a *apiServer) handleGetPaste(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 	}
-	// #58: only the reader that wins the atomic burn claim may see content.
+	rem, _ := a.store.RegisterRead(row, currentViewerID(r), a.burnViewerWindow()) // #49 (also covers legacy burn)
 	rem, admitted := a.store.RegisterRead(row, currentViewerID(r), a.burnViewerWindow())
 	if !admitted {
 		writeErr(w, 404, "paste not found")
 		return
 	}
 	writeJSON(w, 200, map[string]any{
 		"id": row.ID, "content": row.Content, "content_type": row.ContentType,
 		"language": store.NullStrPtr(row.Language), "title": store.NullStrPtr(row.Title), "created_at": row.CreatedAt,
@@ -305,50 +232,19 @@ func (a *apiServer) handleDeletePaste(w http.ResponseWriter, r *http.Request) {
 		writeErr(w, 404, "paste not found")
 		return
 	}
 	// #63: deletion requires authorization. Either the deletion token issued
 	// at create time (Authorization header or ?token= query param, matching
 	// the create response's "deletion_token" field), or the creator browser
 	// itself (client-sent vwr cookie matching the paste's viewer, #37).
 	if !a.deletionAuthorized(r, row) {
 		writeErr(w, 403, "deletion token required")
 		return
 	}
 	if _, err := a.store.SoftDelete(row.ID); err != nil {
 		writeErr(w, 500, "db error")
 		return
 	}
 	writeJSON(w, 200, map[string]string{"status": "soft-deleted"})
 }
 // deletionAuthorization extracts the deletion token from the request: the
 // Authorization header ("Bearer <t>", "Token <t>", or a bare token) or the
 // token query parameter. Returns "" when absent.
 func deletionAuthorization(r *http.Request) string {
 	if h := r.Header.Get("Authorization"); h != "" {
 		for _, prefix := range []string{"Bearer ", "Token "} {
 			if len(h) > len(prefix) && strings.EqualFold(h[:len(prefix)], prefix) {
 				return strings.TrimSpace(h[len(prefix):])
 			}
 		}
 		return strings.TrimSpace(h)
 	}
 	return r.URL.Query().Get("token")
 }
 // deletionAuthorized reports whether the request may soft-delete the paste:
 // a valid constant-time-matched deletion token, or the creator browser's
 // viewer cookie (#37). Plain API clients with no token get false.
 func (a *apiServer) deletionAuthorized(r *http.Request, row *store.PasteRow) bool {
 	if tok := deletionAuthorization(r); tok != "" {
 		return row.DeletionToken.Valid && row.DeletionToken.String != "" &&
 			store.DeletionTokenEqual(row.DeletionToken.String, tok)
 	}
 	// viewer-cookie delete enforcement (#37): only the browser that created
 	// the paste (matching vwr) may delete it via this endpoint. Requests with
 	// no client-sent vwr cookie (plain API clients) are unaffected.
 	vid := currentViewerID(r)
-	return vid != "" && viewerSentCookie(r) && row.ViewerID.Valid &&
+	if vid != "" && viewerSentCookie(r) && row.ViewerID.Valid && row.ViewerID.String != "" && row.ViewerID.String != vid {
-		row.ViewerID.String != "" && row.ViewerID.String == vid
+		writeErr(w, 403, "not your paste")
 		return
 	}
 	if err := a.store.SoftDelete(row.ID); err != nil {
 		writeErr(w, 500, "db error")
 		return
 	}
 	writeJSON(w, 200, map[string]string{"status": "soft-deleted"})
 }
 // handleListMine serves /api/mine: pastes created from this browser (#37).
@@ -358,8 +254,11 @@ func (a *apiServer) handleListMine(w http.ResponseWriter, r *http.Request) {
 		writeJSON(w, 200, map[string]any{"total": 0, "items": []any{}})
 		return
 	}
-	limit := parseLimit(r, 50, 100)
+	limit, _ := strconv.Atoi(r.URL.Query().Get("limit"))
-	offset := parseOffset(r)
+	if limit <= 0 || limit > 100 {
 		limit = 50
 	}
 	offset, _ := strconv.Atoi(r.URL.Query().Get("offset"))
 	rows, total, err := a.store.ListMine(vid, limit, offset)
 	if err != nil {
 		writeErr(w, 500, "db error")
@@ -372,15 +271,17 @@ func (a *apiServer) handleListMine(w http.ResponseWriter, r *http.Request) {
 			"id": row.ID, "title": title, "language": lang,
 			"created_at": row.CreatedAt, "view_count": row.ViewCount, "size": row.Size,
 			"custom_slug": store.NullStrPtr(row.CustomSlug), "visibility": row.Visibility,
 			"is_can": row.IsCan,
 		})
 	}
 	writeJSON(w, 200, map[string]any{"total": total, "limit": limit, "offset": offset, "items": items})
 }
 func (a *apiServer) handleListPublic(w http.ResponseWriter, r *http.Request) {
-	limit := parseLimit(r, 25, 100)
+	limit, _ := strconv.Atoi(r.URL.Query().Get("limit"))
-	offset := parseOffset(r)
+	if limit <= 0 || limit > 100 {
 		limit = 25
 	}
 	offset, _ := strconv.Atoi(r.URL.Query().Get("offset"))
 	rows, total, err := a.store.ListPublic(limit, offset)
 	if err != nil {
 		writeErr(w, 500, "db error")
@@ -393,7 +294,6 @@ func (a *apiServer) handleListPublic(w http.ResponseWriter, r *http.Request) {
 			"id": row.ID, "title": title, "language": lang,
 			"created_at": row.CreatedAt, "view_count": row.ViewCount, "size": row.Size,
 			"custom_slug": store.NullStrPtr(row.CustomSlug),
 			"is_can":      row.IsCan,
 		})
 	}
 	writeJSON(w, 200, map[string]any{"total": total, "limit": limit, "offset": offset, "items": items})
@@ -419,13 +319,8 @@ func (a *apiServer) handleRaw(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	// #49 decision: raw reads count against the read budget too, with the
-	// same per-viewer dedupe window as page views. #58: a reader that loses
+	// same per-viewer dedupe window as page views.
-	// the burn claim must not receive the content.
+	a.store.RegisterRead(row, currentViewerID(r), a.burnViewerWindow())
 	_, admitted := a.store.RegisterRead(row, currentViewerID(r), a.burnViewerWindow())
 	if !admitted {
 		http.Error(w, "not found", 404)
 		return
 	}
 	// #34: content_type is attacker-controlled via the create API. Serving it
 	// verbatim let a paste be stored with text/html (or image/svg+xml) and
 	// render as active content on this origin when fetched from /raw —
@@ -437,7 +332,7 @@ func (a *apiServer) handleRaw(w http.ResponseWriter, r *http.Request) {
 	}
 	w.Header().Set("Content-Type", ct)
 	w.Header().Set("X-Content-Type-Options", "nosniff")
-	a.store.IncrementViews(row.ID, "", 0) // raw views always count (#49/#95)
+	a.store.IncrementViews(row.ID)
 	w.Write([]byte(row.Content))
 }
@@ -466,117 +361,13 @@ func (a *apiServer) handleCanPage(w http.ResponseWriter, r *http.Request) {
 		http.NotFound(w, r)
 		return
 	}
-	if can.ExpiresAt.Valid && can.ExpiresAt.Int64 < time.Now().Unix() {
+	items, _ := a.store.ListCanItems(can.ID)
-		http.NotFound(w, r)
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-		return
+	fmt.Fprintf(w, "<!doctype html><html><head><title>can/%s — palette</title></head><body><h1>can/%s</h1><ul>", can.ID, can.ID)
 	}
 	// #4: password-protected cans go through the same unlock flow as pastes:
 	// the pw_<id> cookie carries an HMAC token bound to this can id. Items
 	// inherit the protection (handleCanItem checks the same cookie).
 	if can.PasswordHash.Valid {
 		h := a.webHandlers()
 		if r.Method == http.MethodPost {
 			if !rateLimitUnlock(can.ID, r) {
 				h.WriteRateLimited(w, 60)
 				return
 			}
 			r.ParseForm()
 			pw := r.FormValue("password")
 			if pw != "" && store.CheckPassword(can.PasswordHash.String, pw) {
 				http.SetCookie(w, &http.Cookie{
 					Name: "pw_" + can.ID, Value: web.UnlockToken(can.ID), Path: "/",
 					MaxAge: 3600, HttpOnly: true, SameSite: http.SameSiteLaxMode,
 				})
 				a.renderCan(w, can)
 				return
 			}
 			h.RenderPage(w, "unlock.html", map[string]any{
 				"Page": "unlock", "ID": can.ID, "Wrong": true,
 				"CreatedAgo": web.AgoString(can.CreatedAt), "CreatedAtUnix": can.CreatedAt,
 			})
 			return
 		}
 		c, err := r.Cookie("pw_" + can.ID)
 		if err != nil || c.Value != web.UnlockToken(can.ID) {
 			h.RenderPage(w, "unlock.html", map[string]any{
 				"Page": "unlock", "ID": can.ID, "Wrong": false,
 				"CreatedAgo": web.AgoString(can.CreatedAt), "CreatedAtUnix": can.CreatedAt,
 			})
 			return
 		}
 	}
 	a.renderCan(w, can)
 }
 // renderCan renders the can view page: title/description and items as cards.
 // Text items expand inline; files link to download.
 func (a *apiServer) renderCan(w http.ResponseWriter, can *store.CanRow) {
 	h := a.webHandlers()
 	items, err := a.store.ListCanItems(can.ID)
 	if err != nil {
 		http.Error(w, "db error", 500)
 		return
 	}
 	type canItem struct {
 		ID          string
 		Title       string
 		ContentType string
 		Size        string
 		IsFile      bool
 		Content     string
 		ContentHTML template.HTML
 		Language    string
 	}
 	cards := make([]canItem, 0, len(items))
 	totalSize := 0
 	for _, it := range items {
-		totalSize += len(it.Content)
+		fmt.Fprintf(w, `<li><a href="/api/cans/%s/items/%s">%s</a> (%s)</li>`, can.ID, it.ID, templateEsc(nullStrOr(it.Title, it.ID)), it.ContentType)
 		isFile := it.ContentType != "text/plain" && !strings.HasPrefix(it.ContentType, "text/")
 		ci := canItem{
 			ID:          it.ID,
 			Title:       nullStrOr(it.Title, it.ID),
 			ContentType: it.ContentType,
 			Size:        web.HumanSize(len(it.Content)),
 			IsFile:      isFile,
 			Language:    it.Language.String,
 		}
 		if !isFile {
 			ci.ContentHTML = template.HTML(langpkg.HighlightCode(it.Content, it.Language.String))
 		}
 		cards = append(cards, ci)
 	}
 	h.RenderPage(w, "can.html", map[string]any{
 		"Page":          "can",
 		"ID":            can.ID,
 		"Title":         nullStrOr(can.Title, "Untitled can"),
 		"Description":   can.Description.String,
 		"HasDescription": can.Description.Valid && can.Description.String != "",
 		"HasPassword":   can.PasswordHash.Valid,
 		"Items":         cards,
 		"ItemCount":     len(cards),
 		"SizeHuman":     web.HumanSize(totalSize),
 		"CreatedAgo":    web.AgoString(can.CreatedAt),
 		"CreatedAtUnix": can.CreatedAt,
 		"ExpiresAt":     can.ExpiresAt.Valid,
 		"ExpiresIn":     expiryStringIfValid(can.ExpiresAt),
 	})
 }
 // expiryStringIfValid formats remaining time for a valid expiry, "" otherwise.
 func expiryStringIfValid(ns sql.NullInt64) string {
 	if !ns.Valid {
 		return ""
 	}
 	remaining := ns.Int64 - time.Now().Unix()
 	s := remaining
 	switch {
 	case s < 3600:
 		return fmt.Sprintf("%dm", s/60)
 	case s < 86400:
 		return fmt.Sprintf("%dh", s/3600)
 	default:
 		return fmt.Sprintf("%dd", s/86400)
 	}
 	fmt.Fprintf(w, "</ul></body></html>")
 }
 func templateEsc(s string) string {
@@ -1,136 +0,0 @@
 package api
 import (
 	"errors"
 	"fmt"
 	"net/http"
 	"regexp"
 	"strconv"
 	"strings"
 )
 // #68 input-validation helpers. Paste/can payloads are size-capped and list
 // endpoints get a single place where limit/offset are parsed and clamped.
 // maxRequestBody returns the HTTP body cap for JSON create endpoints: the
 // admin-tunable content cap plus headroom for JSON field overhead, floored
 // at 64KiB so a tiny admin-configured cap can't break small requests.
 func (a *apiServer) maxRequestBody() int64 {
 	s := a.settings.get()
 	max := s.MaxContentBytes + 4096
 	if max < 64*1024 {
 		max = 64 * 1024
 	}
 	return max
 }
 // limitRequestBody wraps the request body with http.MaxBytesReader so
 // oversized payloads are cut off server-side instead of being fully decoded
 // into memory before the per-field size check runs (#68). A read over the
 // cap surfaces as *http.MaxBytesError, which handlers map to 413.
 func (a *apiServer) limitRequestBody(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.Body != nil {
 			r.Body = http.MaxBytesReader(w, r.Body, a.maxRequestBody())
 		}
 		next.ServeHTTP(w, r)
 	})
 }
 // writeBodyTooLarge emits the 413 response for a body rejected by
 // MaxBytesReader.
 func writeBodyTooLarge(w http.ResponseWriter) {
 	writeErr(w, http.StatusRequestEntityTooLarge, "request body too large")
 }
 // isBodyTooLarge reports whether err came from http.MaxBytesReader.
 func isBodyTooLarge(err error) bool {
 	var mbe *http.MaxBytesError
 	return errors.As(err, &mbe)
 }
 // checkContent validates paste content: rejects whitespace-only content
 // (400) and content over the byte cap (413). Returns (0, "") when valid.
 func checkContent(content string, maxBytes int64) (int, string) {
 	if strings.TrimSpace(content) == "" {
 		return http.StatusBadRequest, "content is required"
 	}
 	if int64(len(content)) > maxBytes { // #40/#68: admin-tunable cap
 		return http.StatusRequestEntityTooLarge,
 			fmt.Sprintf("content exceeds max %d bytes", maxBytes)
 	}
 	return 0, ""
 }
 // parseLimit clamps the ?limit query param: missing/non-numeric/zero/negative
 // or over-max values fall back to def. Zero intentionally maps to the default
 // page size, matching the pre-existing `<= 0` clamp (#68).
 func parseLimit(r *http.Request, def, max int) int {
 	n, err := strconv.Atoi(r.URL.Query().Get("limit"))
 	if err != nil || n <= 0 || n > max {
 		return def
 	}
 	return n
 }
 // parseOffset clamps the ?offset query param: missing/non-numeric or negative
 // values become 0 (#68: negative offsets previously passed through to SQL).
 func parseOffset(r *http.Request) int {
 	n, err := strconv.Atoi(r.URL.Query().Get("offset"))
 	if err != nil || n < 0 {
 		return 0
 	}
 	return n
 }
 // parseBurnAfterReads validates the burn_after_reads field (#68): negative
 // values are rejected; zero/absent mean the default single read.
 func parseBurnAfterReads(n int) error {
 	if n < 0 {
 		return errors.New("burn_after_reads must be a positive number")
 	}
 	return nil
 }
 // #86: bounds for free-form metadata fields on create.
 const (
 	maxTitleLen    = 200
 	maxLanguageLen = 40
 )
 // languageRe restricts language to identifiers like go, c#, f#, c++, objc.
 var languageRe = regexp.MustCompile(`^[a-zA-Z0-9+#-]{1,40}$`)
 // checkTitle validates the paste title (#86): over-max titles are truncated
 // to 200 characters so a bloated listing entry can't be stored; whitespace
 // is trimmed first.
 func checkTitle(title string) (string, error) {
 	title = strings.TrimSpace(title)
 	if len(title) > maxTitleLen {
 		return truncateRunes(title, maxTitleLen), nil
 	}
 	return title, nil
 }
 // checkLanguage validates the language field (#86): optional, max 40 chars,
 // and must match ^[a-zA-Z0-9+#-]{1,40}$. Returns "" for absent/blank values.
 // Anything else malformed is a 400.
 func checkLanguage(lang string) (string, error) {
 	lang = strings.TrimSpace(lang)
 	if lang == "" {
 		return "", nil
 	}
 	if len(lang) > maxLanguageLen || !languageRe.MatchString(lang) {
 		return "", fmt.Errorf("language must match ^[a-zA-Z0-9+#-]{1,40}$ (max %d chars)", maxLanguageLen)
 	}
 	return lang, nil
 }
 // truncateRunes cuts s to at most max runes, keeping the prefix intact.
 func truncateRunes(s string, max int) string {
 	runes := []rune(s)
 	if len(runes) <= max {
 		return s
 	}
 	return string(runes[:max])
 }
@@ -1,121 +0,0 @@
 package api
 import (
 	"net/http"
 	"net/http/httptest"
 	"strings"
 	"testing"
 	"time"
 	"palette/internal/store"
 )
 // #95: HTML paste views dedupe per viewer (vwr cookie) within the burn viewer
 // window, reusing the paste_views table. Repeated views by the same viewer do
 // not inflate view_count; a different viewer counts.
 func TestHTMLViewsDedupedPerViewer(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"vd"}`))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	id := jsonField(t, rec.Body.String(), "id")
 	view := func(vwr string) {
 		req := httptest.NewRequest("GET", "/"+id, nil)
 		if vwr != "" {
 			req.AddCookie(&http.Cookie{Name: "vwr", Value: vwr})
 		}
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		if rec.Code != 200 {
 			t.Fatalf("view: got %d", rec.Code)
 		}
 	}
 	count := func() string {
 		req := httptest.NewRequest("GET", "/api/pastes/"+id, nil)
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		return rec.Body.String()
 	}
 	// same viewer (same cookie) renders twice: still 1 view
 	view("v-a")
 	view("v-a")
 	if got := count(); !strings.Contains(got, `"view_count":1`) {
 		t.Fatalf("expected view_count 1 after duplicate viewer views, got: %s", got)
 	}
 	// a different viewer counts
 	view("v-b")
 	if got := count(); !strings.Contains(got, `"view_count":2`) {
 		t.Fatalf("expected view_count 2 after second viewer, got: %s", got)
 	}
 	// viewer without cookie counts every time (plain API clients, #49 decision)
 	view("")
 	view("")
 	if got := count(); !strings.Contains(got, `"view_count":4`) {
 		t.Fatalf("expected view_count 4 after uncoookied views, got: %s", got)
 	}
 }
 // #95: raw views always count, even from a cookie-holding viewer (#49 decision).
 func TestRawViewsAlwaysCount(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"rv"}`))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	id := jsonField(t, rec.Body.String(), "id")
 	for i := 0; i < 3; i++ {
 		req := httptest.NewRequest("GET", "/raw/"+id, nil)
 		req.AddCookie(&http.Cookie{Name: "vwr", Value: "same-viewer"})
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		if rec.Code != 200 {
 			t.Fatalf("raw view: got %d", rec.Code)
 		}
 	}
 	req = httptest.NewRequest("GET", "/api/pastes/"+id, nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if got := rec.Body.String(); !strings.Contains(got, `"view_count":3`) {
 		t.Fatalf("expected view_count 3 after 3 raw views by one viewer, got: %s", got)
 	}
 }
 // #95: after the dedupe window passes, the same viewer counts again.
 func TestViewDedupeWindowExpires(t *testing.T) {
 	s := testServer(t)
 	h := s.routes()
 	req := httptest.NewRequest("POST", "/api/pastes", strings.NewReader(`{"content":"we"}`))
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	id := jsonField(t, rec.Body.String(), "id")
 	view := func() {
 		req := httptest.NewRequest("GET", "/"+id, nil)
 		req.AddCookie(&http.Cookie{Name: "vwr", Value: "v-w"})
 		rec := httptest.NewRecorder()
 		h.ServeHTTP(rec, req)
 		if rec.Code != 200 {
 			t.Fatalf("view: got %d", rec.Code)
 		}
 	}
 	view()
 	view()
 	// jump past the 15-minute window
 	realNow := store.TimeNow
 	store.TimeNow = func() time.Time { return realNow().Add(16 * time.Minute) }
 	defer func() { store.TimeNow = realNow }()
 	view()
 	req = httptest.NewRequest("GET", "/api/pastes/"+id, nil)
 	rec = httptest.NewRecorder()
 	h.ServeHTTP(rec, req)
 	if got := rec.Body.String(); !strings.Contains(got, `"view_count":2`) {
 		t.Fatalf("expected view_count 2 after window expiry, got: %s", got)
 	}
 }
@@ -17,34 +17,23 @@ func genDeletionToken() string {
 // TimeNow is overridable in tests to inject the clock.
 var TimeNow = time.Now
-// RegisterRead applies the burn-after-read budget for one view (#49).
+// registerRead applies the burn-after-read budget for one view (#49).
 // For pastes with reads_limit set: the viewer's paste_views row is checked;
 // a view within the burn viewer window of the viewer's last view is deduped
 // (count=false). Otherwise reads_used is incremented, and the paste is
 // soft-deleted (burned) once reads_used reaches reads_limit. Viewers without
 // a cookie (plain API clients) count as their own viewer id "".
 // For legacy plain burn_after_read pastes (no reads_limit), any read burns.
-// #58: admission is atomic. Returns (remaining, admitted). admitted is true
+// Returns the number of reads remaining (0 when burned), or nil when no
-// only when this caller may serve the content: for legacy burn pastes the
+// budget is set. view_count is tracked separately and unaffected.
-// caller wins exactly when its conditional soft delete flipped deleted_at
+func (s *Store) RegisterRead(row *PasteRow, viewerID string, burnWindowMinutes int) (remaining *int, count bool) {
 // (RowsAffected), and for read-budget pastes the caller wins exactly when its
 // conditional UPDATE (reads_used < reads_limit) incremented the counter - so
 // concurrent readers can never both consume the last read. Losing callers
 // must treat the paste as gone. view_count is tracked separately and
 // unaffected.
 func (s *Store) RegisterRead(row *PasteRow, viewerID string, burnWindowMinutes int) (remaining *int, admitted bool) {
 	if !row.ReadsLimit.Valid {
 		if row.BurnAfterRead {
-			// #58: atomic claim - only the caller whose UPDATE actually
+			s.SoftDelete(row.ID)
 			// flips deleted_at from NULL may serve the content.
 			ok, err := s.SoftDelete(row.ID)
 			r := 0
 			if err != nil || !ok {
 				return &r, false
 			}
 			return &r, true
 		}
-		return nil, true
+		return nil, false
 	}
 	now := TimeNow().Unix()
 	var last sql.NullInt64
@@ -55,28 +44,14 @@ func (s *Store) RegisterRead(row *PasteRow, viewerID string, burnWindowMinutes i
 		if r < 0 {
 			r = 0
 		}
-		return &r, true
+		return &r, false
 	}
 	s.db.Exec(`INSERT INTO paste_views (paste_id, viewer_id, last_viewed) VALUES (?,?,?)
 		ON CONFLICT(paste_id, viewer_id) DO UPDATE SET last_viewed = excluded.last_viewed`,
 		row.ID, viewerID, now)
-	// #58: conditional increment - only succeeds while budget remains, so
+	used := row.ReadsUsed + 1
-	// concurrent readers cannot both consume the final read.
+	s.db.Exec(`UPDATE pastes SET reads_used=? WHERE id=?`, used, row.ID)
-	res, err := s.db.Exec(`UPDATE pastes SET reads_used = reads_used + 1
+	if int64(used) >= row.ReadsLimit.Int64 {
 		WHERE id = ? AND deleted_at IS NULL AND reads_used < ?`, row.ID, row.ReadsLimit.Int64)
 	if err != nil {
 		r := 0
 		return &r, false
 	}
 	if n, _ := res.RowsAffected(); n == 0 {
 		// Lost the race: budget exhausted (or paste already burned).
 		r := 0
 		return &r, false
 	}
 	var used int64
 	s.db.QueryRow(`SELECT reads_used FROM pastes WHERE id = ?`, row.ID).Scan(&used)
 	if used >= row.ReadsLimit.Int64 {
 		// Atomic burn; either way the paste is gone for future readers.
 		s.SoftDelete(row.ID)
 	}
 	r := int(row.ReadsLimit.Int64) - int(used)
@@ -30,8 +30,6 @@ type Paste struct {
 	BurnAfterRead bool  `json:"burn_after_read,omitempty"`
 	BurnAfterReads *int `json:"burn_after_reads,omitempty"` // #49: readable N times (default 1)
 	Visibility  string  `json:"visibility"`
 	// #83: accept "public": true/false as an alias for visibility.
 	Public *bool `json:"public,omitempty"`
 	CanID       *string `json:"can_id,omitempty"`
 	CreatedAt   int64   `json:"created_at"`
 	DeletedAt   *int64  `json:"deleted_at,omitempty"`
@@ -62,7 +60,6 @@ type PasteRow struct {
 	Size          int
 	DeletionToken sql.NullString
 	ViewerID      sql.NullString
 	IsCan         bool // set on list rows that are cans (#4)
 }
 type CanRow struct {
@@ -73,8 +70,6 @@ type CanRow struct {
 	CreatedAt    int64
 	DeletedAt    sql.NullInt64
 	ExpiresAt    sql.NullInt64
 	Description  sql.NullString
 	ViewerID     sql.NullString
 }
 type Store struct {
@@ -86,11 +81,6 @@ func OpenStore(path string) (*Store, error) {
 	if err != nil {
 		return nil, err
 	}
 	// #58: a single write connection. SQLite allows only one writer at a
 	// time; with multiple pooled connections concurrent writes surface as
 	// SQLITE_BUSY errors ("database is locked") instead of serializing, and
 	// the burn-after-read race tests saw spurious 500s under parallel reads.
 	db.SetMaxOpenConns(1)
 	s := &Store{db: db}
 	if err := s.migrate(); err != nil {
 		return nil, err
@@ -135,7 +125,6 @@ deletion_token TEXT
 	s.db.Exec(`ALTER TABLE pastes ADD COLUMN viewer_id TEXT`)     // ignore if exists (#37)
 	s.db.Exec(`ALTER TABLE pastes ADD COLUMN reads_limit INTEGER`)          // ignore if exists (#49)
 	s.db.Exec(`ALTER TABLE pastes ADD COLUMN reads_used INTEGER DEFAULT 0`) // ignore if exists (#49)
 	s.db.Exec(`ALTER TABLE paste_cans ADD COLUMN viewer_id TEXT`) // ignore if exists (#4)
 	s.db.Exec(`CREATE TABLE IF NOT EXISTS paste_views (
 		paste_id    TEXT NOT NULL,
 		viewer_id   TEXT NOT NULL,
@@ -211,28 +200,16 @@ func (s *Store) CreatePaste(p *Paste) (*Paste, error) {
 		}
 	}
-	// #49/#82: burn-after-read pastes carry a read budget (default 1 read).
+	// #49: burn-after-read pastes carry a read budget (default 1 read)
-	// burn_after_reads > 0 alone implies burn mode even without burn_after_read.
+	if p.BurnAfterRead {
 	if p.BurnAfterRead || (p.BurnAfterReads != nil && *p.BurnAfterReads > 0) {
 		limit := int64(1)
 		if p.BurnAfterReads != nil && *p.BurnAfterReads > 0 {
 			limit = int64(*p.BurnAfterReads)
 		}
 		p.readsLimit = &limit
 		if !p.BurnAfterRead {
 			p.BurnAfterRead = true
 		}
 	}
 	visibility := p.Visibility
 	// #83: "public": false -> unlisted, true -> public; overrides string field
 	if p.Public != nil {
 		if *p.Public {
 			visibility = "public"
 		} else {
 			visibility = "unlisted"
 		}
 	}
 	if visibility == "" {
 		visibility = "public"
 	}
@@ -275,19 +252,10 @@ func (s *Store) GetPaste(idOrSlug string) (*PasteRow, error) {
 	return &r, err
 }
 // ListPublic backs /api/public and the public listing page. Visibility rules
 // mirror the history page: only non-deleted, non-expired, non-can pastes are
 // listed, and password-protected pastes are excluded at the query level
 // (#65) so their metadata (title, slug, existence) never leaks.
 func (s *Store) ListPublic(limit, offset int) ([]PasteRow, int, error) {
-	rows, err := s.db.Query(`SELECT id, custom_slug, content_type, language, title, visibility, created_at, view_count, LENGTH(content), 0
+	rows, err := s.db.Query(`SELECT id, custom_slug, content_type, language, title, visibility, created_at, view_count, LENGTH(content) FROM pastes
-		FROM pastes
+		WHERE visibility='public' AND deleted_at IS NULL AND can_id IS NULL AND (expires_at IS NULL OR expires_at > ?)
-		WHERE visibility='public' AND deleted_at IS NULL AND can_id IS NULL AND password_hash IS NULL AND (expires_at IS NULL OR expires_at > ?)
+		ORDER BY created_at DESC LIMIT ? OFFSET ?`, time.Now().Unix(), limit, offset)
 		UNION ALL
 		SELECT id, NULL, 'text/plain', NULL, title, visibility, created_at, 0, 0, 1
 		FROM paste_cans
 		WHERE visibility='public' AND deleted_at IS NULL AND (expires_at IS NULL OR expires_at > ?)
 		ORDER BY created_at DESC LIMIT ? OFFSET ?`, time.Now().Unix(), time.Now().Unix(), limit, offset)
 	if err != nil {
 		return nil, 0, err
 	}
@@ -296,33 +264,25 @@ func (s *Store) ListPublic(limit, offset int) ([]PasteRow, int, error) {
 	for rows.Next() {
 		var r PasteRow
 		var cs, lang, title sql.NullString
-		var isCan int
+		if err := rows.Scan(&r.ID, &cs, &r.ContentType, &lang, &title, &r.Visibility, &r.CreatedAt, &r.ViewCount, &r.Size); err != nil {
 		if err := rows.Scan(&r.ID, &cs, &r.ContentType, &lang, &title, &r.Visibility, &r.CreatedAt, &r.ViewCount, &r.Size, &isCan); err != nil {
 			return nil, 0, err
 		}
 		r.CustomSlug = cs
 		r.Language = lang
 		r.Title = title
 		r.IsCan = isCan == 1
 		out = append(out, r)
 	}
 	var total int
-	s.db.QueryRow(`SELECT (SELECT COUNT(*) FROM pastes WHERE visibility='public' AND deleted_at IS NULL AND can_id IS NULL AND password_hash IS NULL AND (expires_at IS NULL OR expires_at > ?))
+	s.db.QueryRow(`SELECT COUNT(*) FROM pastes WHERE visibility='public' AND deleted_at IS NULL AND can_id IS NULL AND (expires_at IS NULL OR expires_at > ?)`, time.Now().Unix()).Scan(&total)
 		+ (SELECT COUNT(*) FROM paste_cans WHERE visibility='public' AND deleted_at IS NULL AND (expires_at IS NULL OR expires_at > ?))`,
 		time.Now().Unix(), time.Now().Unix()).Scan(&total)
 	return out, total, nil
 }
 // ListMine lists pastes created from the given viewer id (browser cookie), newest first.
 func (s *Store) ListMine(viewerID string, limit, offset int) ([]PasteRow, int, error) {
-	rows, err := s.db.Query(`SELECT id, custom_slug, language, title, visibility, created_at, view_count, LENGTH(content), 0
+	rows, err := s.db.Query(`SELECT id, custom_slug, language, title, visibility, created_at, view_count, LENGTH(content)
 		FROM pastes
 		WHERE viewer_id = ? AND deleted_at IS NULL AND can_id IS NULL AND (expires_at IS NULL OR expires_at > ?)
-		UNION ALL
+		ORDER BY created_at DESC LIMIT ? OFFSET ?`, viewerID, time.Now().Unix(), limit, offset)
 		SELECT id, NULL, NULL, title, visibility, created_at, 0, 0, 1
 		FROM paste_cans
 		WHERE viewer_id = ? AND deleted_at IS NULL AND (expires_at IS NULL OR expires_at > ?)
 		ORDER BY created_at DESC LIMIT ? OFFSET ?`, viewerID, time.Now().Unix(), viewerID, time.Now().Unix(), limit, offset)
 	if err != nil {
 		return nil, 0, err
 	}
@@ -331,18 +291,16 @@ func (s *Store) ListMine(viewerID string, limit, offset int) ([]PasteRow, int, e
 	for rows.Next() {
 		var r PasteRow
 		var cs, lang, title sql.NullString
-		var isCan int
+		if err := rows.Scan(&r.ID, &cs, &lang, &title, &r.Visibility, &r.CreatedAt, &r.ViewCount, &r.Size); err != nil {
 		if err := rows.Scan(&r.ID, &cs, &lang, &title, &r.Visibility, &r.CreatedAt, &r.ViewCount, &r.Size, &isCan); err != nil {
 			return nil, 0, err
 		}
 		r.CustomSlug, r.Language, r.Title = cs, lang, title
 		r.IsCan = isCan == 1
 		out = append(out, r)
 	}
 	var total int
-	s.db.QueryRow(`SELECT (SELECT COUNT(*) FROM pastes WHERE viewer_id = ? AND deleted_at IS NULL AND can_id IS NULL AND (expires_at IS NULL OR expires_at > ?))
+	s.db.QueryRow(`SELECT COUNT(*) FROM pastes
-		+ (SELECT COUNT(*) FROM paste_cans WHERE viewer_id = ? AND deleted_at IS NULL AND (expires_at IS NULL OR expires_at > ?))`,
+		WHERE viewer_id = ? AND deleted_at IS NULL AND can_id IS NULL AND (expires_at IS NULL OR expires_at > ?)`,
-		viewerID, time.Now().Unix(), viewerID, time.Now().Unix()).Scan(&total)
+		viewerID, time.Now().Unix()).Scan(&total)
 	return out, total, nil
 }
@@ -362,51 +320,19 @@ func (s *Store) MineOwner(id string) (string, error) {
 	return vid.String, nil
 }
-// SoftDelete marks a paste deleted (burned) atomically (#58): the deleted_at
+func (s *Store) SoftDelete(id string) error {
-// IS NULL guard means only the first caller flips the row. Returns true when
+	_, err := s.db.Exec(`UPDATE pastes SET deleted_at=? WHERE id=? AND deleted_at IS NULL`, time.Now().Unix(), id)
-// this call performed the delete (RowsAffected > 0), false when the paste was
+	return err
 // already deleted - callers use this to decide read admission atomically.
 func (s *Store) SoftDelete(id string) (bool, error) {
 	res, err := s.db.Exec(`UPDATE pastes SET deleted_at=? WHERE id=? AND deleted_at IS NULL`, time.Now().Unix(), id)
 	if err != nil {
 		return false, err
 	}
 	n, err := res.RowsAffected()
 	return n > 0, err
 }
-// IncrementViews counts one view. With a viewerID (#95): views are deduped
+func (s *Store) IncrementViews(id string) {
 // per-viewer within burnViewerWindow minutes using the paste_views table,
 // namespaced with a "views/" viewer prefix so these rows never collide with
 // RegisterRead's burn-after-read dedupe rows (which key on the raw viewer id).
 // Raw views always count (#49 decision) — call with viewerID="" for those.
 // Returns true when the view was counted.
 func (s *Store) IncrementViews(id, viewerID string, burnWindowMinutes int) bool {
 	if viewerID == "" {
 	s.db.Exec(`UPDATE pastes SET view_count = view_count + 1 WHERE id = ?`, id)
 		return true
 	}
 	now := TimeNow().Unix()
 	vkey := "views/" + viewerID
 	var last sql.NullInt64
 	s.db.QueryRow(`SELECT last_viewed FROM paste_views WHERE paste_id=? AND viewer_id=?`,
 		id, vkey).Scan(&last)
 	if last.Valid && now-last.Int64 < int64(burnWindowMinutes)*60 {
 		return false
 	}
 	s.db.Exec(`INSERT INTO paste_views (paste_id, viewer_id, last_viewed) VALUES (?,?,?)
 		ON CONFLICT(paste_id, viewer_id) DO UPDATE SET last_viewed = excluded.last_viewed`,
 		id, vkey, now)
 	s.db.Exec(`UPDATE pastes SET view_count = view_count + 1 WHERE id = ?`, id)
 	return true
 }
 // SweepExpired soft-deletes expired pastes and hard-deletes soft-deleted pastes past grace.
 func (s *Store) SweepExpired() {
 	now := time.Now().Unix()
 	s.db.Exec(`UPDATE pastes SET deleted_at=? WHERE expires_at IS NOT NULL AND expires_at < ? AND deleted_at IS NULL`, now, now)
 	// #4: cans expire too — mirror paste behavior
 	s.db.Exec(`UPDATE paste_cans SET deleted_at=? WHERE expires_at IS NOT NULL AND expires_at < ? AND deleted_at IS NULL`, now, now)
 	grace := now - SoftDeleteGraceDays*86400
 	s.db.Exec(`DELETE FROM pastes WHERE deleted_at IS NOT NULL AND deleted_at < ?`, grace)
 }
@@ -463,46 +389,13 @@ func (s *Store) HardDelete(id string) {
 	s.db.Exec(`DELETE FROM pastes WHERE id = ?`, id)
 }
-// CreateCan inserts a paste_can row with optional custom slug (parity with
+// InsertCan creates a paste_can row.
-// pastes: validated by the same rules, checked against both tables).
+func (s *Store) InsertCan(canID, title, description, visibility string, pwHash *string, createdAt int64, expiresAt *int64) error {
 // Returns ErrSlugTaken / ErrInvalidSlug / ErrReservedSlug on conflict.
 func (s *Store) CreateCan(canID, title, description, visibility string, pwHash *string, createdAt int64, expiresAt *int64, customSlug *string) error {
 	if customSlug != nil && *customSlug != "" {
 		slug := *customSlug
 		if err := ValidateCustomSlug(slug); err != nil {
 			return err
 		}
 		taken, err := s.SlugTaken(slug)
 		if err != nil {
 			return err
 		}
 		if taken {
 			return ErrSlugTaken
 		}
 		canID = slug
 	}
 	if visibility == "" {
 		visibility = "public"
 	}
 	if visibility != "public" && visibility != "unlisted" {
 		return errors.New("visibility must be public or unlisted")
 	}
 	_, err := s.db.Exec(`INSERT INTO paste_cans (id, title, description, visibility, password_hash, created_at, expires_at)
 		VALUES (?,?,?,?,?,?,?)`, canID, title, description, visibility, pwHash, createdAt, expiresAt)
 	return err
 }
 // SoftDeleteCan marks a can deleted (its items stay; they are unlisted and
 // hidden from listings by can_id and disappear with the can's page).
 func (s *Store) SoftDeleteCan(canID string) (bool, error) {
 	res, err := s.db.Exec(`UPDATE paste_cans SET deleted_at=? WHERE id=? AND deleted_at IS NULL`, time.Now().Unix(), canID)
 	if err != nil {
 		return false, err
 	}
 	n, err := res.RowsAffected()
 	return n > 0, err
 }
 // DeleteCan removes an (empty/aborted) can row.
 func (s *Store) DeleteCan(canID string) {
 	s.db.Exec(`DELETE FROM paste_cans WHERE id=?`, canID)
@@ -521,10 +414,10 @@ func (s *Store) InsertCanItem(canID, title, content, contentType string, languag
 }
 func (s *Store) GetCan(id string) (*CanRow, error) {
-	row := s.db.QueryRow(`SELECT id, title, visibility, password_hash, created_at, deleted_at, expires_at, description, viewer_id
+	row := s.db.QueryRow(`SELECT id, title, visibility, password_hash, created_at, deleted_at, expires_at
-		FROM paste_cans WHERE (id = ?) AND deleted_at IS NULL`, id)
+		FROM paste_cans WHERE id = ? AND deleted_at IS NULL`, id)
 	var c CanRow
-	err := row.Scan(&c.ID, &c.Title, &c.Visibility, &c.PasswordHash, &c.CreatedAt, &c.DeletedAt, &c.ExpiresAt, &c.Description, &c.ViewerID)
+	err := row.Scan(&c.ID, &c.Title, &c.Visibility, &c.PasswordHash, &c.CreatedAt, &c.DeletedAt, &c.ExpiresAt)
 	if err == sql.ErrNoRows {
 		return nil, nil
 	}
@@ -1,46 +0,0 @@
 package web
 import (
 	"net/http"
 	"net/http/httptest"
 	"testing"
 )
 // #59: SecurityHeaders must add the CSP and hardening headers to rendered
 // HTML responses only; JSON and /raw responses pass through untouched.
 func TestSecurityHeaders(t *testing.T) {
 	pages := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "text/html; charset=utf-8")
 		w.Write([]byte("<html><body>ok</body></html>"))
 	})
 	h := SecurityHeaders(pages)
 	rec := httptest.NewRecorder()
 	h.ServeHTTP(rec, httptest.NewRequest("GET", "/", nil))
 	wantCSP := "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; frame-ancestors 'none'"
 	if got := rec.Header().Get("Content-Security-Policy"); got != wantCSP {
 		t.Errorf("CSP = %q, want %q", got, wantCSP)
 	}
 	if got := rec.Header().Get("Referrer-Policy"); got != "no-referrer" {
 		t.Errorf("Referrer-Policy = %q, want no-referrer", got)
 	}
 	if got := rec.Header().Get("X-Content-Type-Options"); got != "nosniff" {
 		t.Errorf("X-Content-Type-Options = %q, want nosniff", got)
 	}
 	// JSON/raw responses: headers are now set unconditionally BEFORE the handler
 	// runs. The previous post-handler approach was silently dropped once a page
 	// handler flushed its template output (headers must be set before WriteHeader).
 	// CSP/nosniff/referrer on non-HTML bodies is harmless and desirable.
 	jsonh := SecurityHeaders(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		w.Write([]byte(`{"ok":true}`))
 	}))
 	rec = httptest.NewRecorder()
 	jsonh.ServeHTTP(rec, httptest.NewRequest("GET", "/api/x", nil))
 	if got := rec.Header().Get("Content-Security-Policy"); got != wantCSP {
 		t.Errorf("CSP missing on JSON response: got %q", got)
 	}
 	if got := rec.Header().Get("Referrer-Policy"); got != "no-referrer" {
 		t.Errorf("Referrer-Policy missing on JSON response: got %q", got)
 	}
 }
@@ -143,7 +143,7 @@ body {
 /* paste view */
 .meta-bar { display: flex; align-items: center; gap: 12px; padding: 12px 18px; flex-wrap: wrap; }
 .meta-bar h1 { font-size: 29.2px; font-weight: 600; }
-.slug { font-family: var(--font-mono); font-size: 21.6px; color: var(--muted-fg); background: var(--surface-2); padding: 3px 9px; border-radius: var(--radius-sm); }
+.slug { font-family: var(--font-mono); font-size: 21.6px; color: var(--muted-fg); background: var(--surface-2); padding: 3px 9px; border-radius: var(--radius); }
 .tag { font-size: 19.8px; color: var(--muted-fg); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 2px 9px; }
 .paste-title-bar { display: flex; align-items: center; gap: 12px; padding: 12px 18px; flex-wrap: wrap; }
 .paste-title-bar h1 { font-size: 29.2px; font-weight: 600; margin: 0; }
@@ -165,20 +165,6 @@ body {
 .settings-head { padding: 12px 18px; border-bottom: 1px solid var(--border); }
 .settings-head h1 { font-size: 29.2px; font-weight: 600; margin: 0; }
 .settings-body { padding: 16px 18px; color: var(--muted-fg); font-size: 21.6px; }
 .settings-section-title { color: var(--fg); font-size: 24px; margin-bottom: 6px; }
 /* theme switcher cards (#100) */
 .theme-grid { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 14px; }
 .theme-card {
  display: flex; flex-direction: column; gap: 10px; align-items: flex-start;
  padding: 14px 16px; min-width: 180px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--fg); font: inherit; font-size: 20px; cursor: pointer;
 }
 .theme-card:hover { border-color: var(--muted); }
 .theme-card[aria-pressed="true"] { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
 .theme-card .swatches { display: flex; gap: 4px; }
 .theme-card .swatch { width: 26px; height: 26px; border-radius: 6px; border: 1px solid rgba(255,255,255,.15); }
 .theme-name { font-weight: 600; }
 .iconbtn:hover { color: var(--fg); border-color: var(--muted); }
 .iconbtn.danger:hover { color: #ff8fa3; border-color: #ff8fa3; }
 .code-head {
@@ -215,8 +201,7 @@ th {
  text-align: left; font-size: 18.9px; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted-fg); padding: 10px 16px; border-bottom: 1px solid var(--border); font-weight: 600;
 }
-td { padding: 10px 16px; border-bottom: 1px solid var(--border); overflow: clip; text-overflow: ellipsis; white-space: nowrap; }
+td { padding: 10px 16px; border-bottom: 1px solid var(--border); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 td:has(> a.slug), td:has(> .slug) { overflow: visible; }
 tr:last-child td { border-bottom: none; }
 tr.row { cursor: pointer; }
 tr.row:hover td { background: var(--surface-2); }
@@ -296,13 +281,6 @@ td a.slug:hover { color: var(--accent); }
 .toast.success { border-color: var(--ok); color: var(--ok); }
 .toast.error { border-color: var(--err); color: var(--err); }
 /* result box color-coding (#105): colored left border + text tint per status */
 .result-ok, .result-err, .result-warn { border-left: 4px solid transparent; padding-left: 10px; }
 .result-ok { border-left-color: var(--ok); color: var(--ok); }
 .result-err { border-left-color: var(--err); color: var(--err); }
 .result-warn { border-left-color: var(--warn); color: var(--warn); }
 .result-ok a { color: var(--ok); }
 /* protection section rhythm (#20) */
 .protect { display: flex; flex-direction: column; gap: 2px; }
 .protect .pw-row { padding: 2px 8px 4px; }
@@ -355,29 +333,17 @@ td a.slug:hover { color: var(--accent); }
 /* paste name under slug pill in Paste column (#43) */
 .paste-sub { font-size: 19.8px; color: var(--muted-fg); margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 .paste-sub.dim { color: var(--muted); }
-td a.slug.url-link { max-width: 100%; display: inline-block; vertical-align: middle; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; box-sizing: border-box; }
+td .url-link { font-size: 19.8px; }
 td .id-link { color: var(--muted-fg); text-decoration: none; font-family: var(--font-mono); font-size: 19.8px; }
 td .id-link:hover { color: var(--accent); }
 /* sortable column headers (#42) */
 th.sortable { cursor: pointer; user-select: none; }
 th.sortable:hover { color: var(--fg); }
-th.sortable { cursor: pointer; user-select: none; white-space: nowrap; }
+.sort-ind { display: inline-block; width: 0; height: 0; margin-left: 6px; vertical-align: middle; border-left: 5px solid transparent; border-right: 5px solid transparent; }
 /* #101: arrow sits LEFT of the label, further spaced, vertically centered,
   and absolutely positioned so it never shifts the label text. */
 th.sortable { position: relative; padding-left: 24px; }
 th.sortable .sort-ind {
  position: absolute; left: 8px; top: 50%; transform: translateY(-50%);
  display: inline-block; width: 0; height: 0;
  border-left: 5px solid transparent; border-right: 5px solid transparent;
 }
 th.sorted.asc .sort-ind { border-bottom: 6px solid var(--accent); }
 th.sorted.desc .sort-ind { border-top: 6px solid var(--accent); }
 /* #102: small unobtrusive admin link on the settings page */
 a.admin-link { color: var(--muted-fg); font-size: 15px; text-decoration: none; }
 a.admin-link:hover { color: var(--fg); text-decoration: underline; }
 /* ============================================================
   Consistency audit (#18) — shared tokens across inputs, buttons,
   headings. Visual-only, no behavior change.
@@ -490,16 +456,3 @@ a.admin-link:hover { color: var(--fg); text-decoration: underline; }
  .unlock-err { font-size: 13px; }
  .center .foot { font-size: 13px; }
 }
 /* #4: can view page + can builder */
 .can-page h1 { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
 .can-items { display: flex; flex-direction: column; gap: 12px; margin-top: 14px; }
 .can-item { padding: 12px 14px; }
 .can-item-head { display: flex; align-items: center; gap: 10px; }
 .can-item-head strong { flex: 1; word-break: break-all; }
 .can-item-body { margin-top: 8px; }
 .can-item-body summary { cursor: pointer; font-size: 19px; color: var(--muted, #888); }
 .can-item-body pre.code { margin: 8px 0 0; overflow-x: auto; }
 .can-item-row { margin-top: 8px; }
 .can-item-row .can-item-title { width: 100%; margin-bottom: 6px; }
 .can-item-row .can-item-content { width: 100%; font-family: var(--mono, monospace); resize: vertical; }
@@ -63,7 +63,7 @@ const PaletteTable = (() => {
        const filtered = state.filter.length > 0;
        const off = (state.page - 1) * opts.perPage;
        const url = (filtered || state.sortKey)
-          ? opts.endpoint + '?limit=' + (opts.fetchLimit || 100) + '&offset=0'
+          ? opts.endpoint + '?limit=500&offset=0'
          : opts.endpoint + '?limit=' + opts.perPage + '&offset=' + off;
        const res = await fetch(url);
        const data = await res.json();
@@ -44,8 +44,7 @@
  function api(path, opts) {
    opts = opts || {};
-    // allow callers to override the key header (e.g. validating a typed key, #99)
+    opts.headers = { 'X-Admin-Key': key() };
    opts.headers = Object.assign({ 'X-Admin-Key': key() }, opts.headers || {});
    if (opts.body) opts.headers['Content-Type'] = 'application/json';
    return fetch(path, opts);
  }
@@ -73,10 +72,9 @@
  document.getElementById('admin-key-form').addEventListener('submit', function (e) {
    e.preventDefault();
    // #99: don't persist the key until the server accepts it
    api('/admin/api/settings', { headers: { 'X-Admin-Key': keyInput.value } }).then(function (r) {
      if (r.status === 200) {
    sessionStorage.setItem(KEY, keyInput.value);
    api('/admin/api/settings').then(function (r) {
      if (r.status === 200) {
        status.textContent = '✓';
        keyInput.value = '';
        loadSettings();
@@ -103,9 +101,7 @@
    });
  });
-  // #112: always show the lock on fresh load — do not auto-restore the
+  if (key()) loadSettings();
  // panel from a stale sessionStorage key. The key is only written after a
  // successful unlock (above) so in-page actions still work within this visit.
 })();
 </script>
 {{template "foot" .}}
@@ -1,36 +0,0 @@
 {{template "head" .}}
 {{template "topbar" .}}
 <div class="center">
  <div class="float can-page" style="max-width:900px; width:100%;">
    <div class="inner">
      <h1>{{.Title}} <span class="badge" title="This is a can — a bundle of pastes">can</span></h1>
      {{if .HasDescription}}<p class="sub">{{.Description}}</p>{{end}}
      <p class="hint">{{.ItemCount}} item{{if ne .ItemCount 1}}s{{end}} · {{.SizeHuman}} · created <span data-ts="{{.CreatedAtUnix}}">{{.CreatedAgo}}</span>{{if .ExpiresAt}} · expires in {{.ExpiresIn}}{{end}}{{if .HasPassword}} · password protected{{end}}</p>
      <div class="can-items">
        {{range .Items}}
        <div class="can-item float">
          <div class="can-item-head">
            <strong>{{.Title}}</strong>
            <span class="dim">{{.Size}}</span>
            {{if .IsFile}}
              <a class="btn btn-icon" href="/api/cans/{{$.ID}}/items/{{.ID}}" download="{{.Title}}" title="Download file" aria-label="Download {{.Title}}">↓</a>
            {{else}}
              <a class="btn btn-icon" href="/api/cans/{{$.ID}}/items/{{.ID}}" title="Raw item" aria-label="Raw {{.Title}}">⧉</a>
            {{end}}
          </div>
          {{if not .IsFile}}
          <details class="can-item-body">
            <summary>Show content</summary>
            <pre class="code"><code>{{.ContentHTML}}</code></pre>
          </details>
          {{else}}
          <div class="hint">Attached file — use the download button above.</div>
          {{end}}
        </div>
        {{end}}
      </div>
    </div>
  </div>
 </div>
 {{template "foot" .}}
@@ -36,8 +36,8 @@ const t = PaletteTable.init({
  rowHtml: it =>
    `<tr class="row" data-href="/${t.esc(it.id)}"><td>` +
    (it.title
-      ? `${t.esc(it.title)}${it.is_can ? ' <span class="badge" title="Can — bundle of items">can</span>' : ''}`
+      ? `${t.esc(it.title)}`
-      : `<a class="slug" href="/${t.esc(it.id)}">${t.esc(it.id)}</a>${it.is_can ? ' <span class="badge" title="Can — bundle of items">can</span>' : ''}`) +
+      : `<a class="slug" href="/${t.esc(it.id)}">${t.esc(it.id)}</a>`) +
    `</td>` +
    `<td><span class="badge">${t.esc(it.language || 'text')}</span></td>` +
    `<td class="dim">${t.fmtSize(it.size)}</td><td class="dim">${it.view_count}</td><td class="dim" data-ts="${it.created_at}">${t.ago(it.created_at)}</td>` +
@@ -3,10 +3,9 @@
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <link rel="stylesheet" href="/static/app.css">
 <script>
-// preset hook (#16): ?theme= wins; else persisted choice (#100)
+// preset preview hook (#16): ?theme=<name> sets data-preset for screenshots only
 (function () {
  var t = new URLSearchParams(location.search).get('theme');
  if (!t) try { t = localStorage.getItem('palette-theme'); } catch (e) {}
  if (t) document.documentElement.dataset.preset = t;
 })();
 </script>
@@ -14,7 +13,7 @@
 {{define "topbar"}}
  <div class="topbar">
-    <a class="logo" href="/history">Palette <em>/ {{ version }}</em></a>
+    <a class="logo" href="/history">Palette <em>/ beta</em></a>
    <nav>
      <a href="/new" {{if eq .Page "new"}}class="on"{{end}}>New</a>
      <a href="/history" {{if eq .Page "history"}}class="on"{{end}}>Public</a>
@@ -21,10 +21,6 @@
    </table>
    <div class="empty" id="empty" style="display:none">No pastes from this browser yet.</div>
  </div>
  <div class="pager float">
    <span id="showing"></span>
    <div class="pg" id="pg"></div>
  </div>
 </div>
 <script src="/static/table.js"></script>
 <script>
@@ -42,13 +38,13 @@ function toast(msg, kind) {
 const t = PaletteTable.init({
  endpoint: '/api/mine',
-  perPage: 25,
+  perPage: 50,
-  hasPager: true,
+  hasPager: false,
  rowHtml: it =>
    `<tr class="row" data-href="/${t.esc(it.id)}"><td>` +
    (it.title
-      ? `${t.esc(it.title)}${it.is_can ? ' <span class="badge" title="Can — bundle of items">can</span>' : ''}`
+      ? `${t.esc(it.title)}`
-      : `<a class="slug" href="/${t.esc(it.id)}">${t.esc(it.id)}</a>${it.is_can ? ' <span class="badge" title="Can — bundle of items">can</span>' : ''}`) +
+      : `<a class="slug" href="/${t.esc(it.id)}">${t.esc(it.id)}</a>`) +
    `</td>` +
    `<td><span class="badge">${t.esc(it.language || 'text')}</span></td>` +
    `<td class="dim">${t.fmtSize(it.size)}</td><td class="dim" data-ts="${it.created_at}">${t.ago(it.created_at)}</td>` +
@@ -68,15 +68,6 @@
      <input type="text" id="custom" class="custom-input" placeholder="/my-snippet">
      <div class="hint" style="margin-top:6px; font-size:19px;">Stays reserved while the paste exists</div>
    </div>
    <div class="float side-section">
      <h3>Can contents</h3>
      <label class="toggle"><input type="checkbox" id="iscan"> Bundle as a can (multiple text items)</label>
      <div class="pw-row" id="canrow" style="display:none">
        <div id="can-items"></div>
        <button class="btn btn-icon" id="can-add" type="button" title="Add item" style="margin-top:6px">+ Add item</button>
        <div class="hint" style="margin-top:6px; font-size:19px;">Each item gets its own card on the can page. File uploads in cans come later.</div>
      </div>
    </div>
    <div class="float side-section" id="result-card" style="display:none">
      <h3>Result</h3>
      <div class="hint" id="result" style="word-break:break-all">empty</div>
@@ -154,54 +145,12 @@ $('pwreveal').addEventListener('click', () => {
  $('pwreveal').title = show ? 'Hide password' : 'Show password';
 });
 // #4: can builder — multiple text items bundled into one shareable page.
 // The main editor becomes the first item; extra items are added below.
 $('iscan').addEventListener('change', e => {
  $('canrow').style.display = e.target.checked ? 'block' : 'none';
  if (e.target.checked && !$('can-items').children.length) addCanItem();
 });
 function addCanItem() {
  const row = document.createElement('div');
  row.className = 'can-item-row';
  row.innerHTML = '<input class="can-item-title" placeholder="Item title">' +
    '<textarea class="can-item-content" placeholder="Item content" rows="3" spellcheck="false"></textarea>';
  $('can-items').appendChild(row);
 }
 $('can-add').addEventListener('click', addCanItem);
 let guessed = ''; // last auto-detected language, '' = user override
-// #105: map backend machine-readable error codes to plain-language guidance.
+function showResult(html, isError) {
 // Unknown codes fall back to a generic message; the technical detail stays
 // in the API response for API consumers.
 const ERROR_MESSAGES = {
  slug_taken: 'That Custom URL is already taken. Try another.',
  slug_reserved: 'That Custom URL is reserved. Try another.',
  slug_invalid: 'Please keep the Custom URL under 64 characters, using only letters, numbers, dashes, or underscores.',
  content_empty: 'Write or paste something first.',
  content_too_large: 'This paste is too large. The limit is 5 MB.',
  expiry_invalid: 'Please pick an expiry between 1 minute and 1 year.',
  rate_limited: 'Too many tries. Wait a minute and try again.',
 };
 const GENERIC_ERROR = 'Something went wrong. Please try again.';
 function friendlyError(data) {
  return ERROR_MESSAGES[data && data.code] || GENERIC_ERROR;
 }
 // #105: color the result box by outcome — success (ok), error (err),
 // warning (warn) — with a colored left border (CSS .result-ok/.result-err).
 function setResultKind(kind) {
  const card = $('result-card');
  card.classList.remove('result-ok', 'result-err', 'result-warn');
  if (kind) card.classList.add('result-' + kind);
 }
 function showResult(html, kind) {
  $('result').innerHTML = html;
-  $('result').dataset.token = kind === 'ok' ? ($('result').dataset.token || '') : ($('result').dataset.token || '');
+  $('result').dataset.token = isError ? '' : ($('result').dataset.token || '');
  $('result-card').style.display = 'block';
  setResultKind(kind === 'ok' ? 'ok' : (kind === 'warn' ? 'warn' : 'err'));
 }
 function defaultFilename(lang) {
  const names = {
@@ -248,9 +197,6 @@ $('reguess').addEventListener('click', guessLang);
 content.addEventListener('paste', () => setTimeout(guessLang, 0));
 async function create() {
  // #4: can mode — bundle the editor + extra items into a can via multipart
  if ($('iscan').checked) return createCan();
  const body = {
    content: content.value,
    title: $('title').value || null,
@@ -276,12 +222,12 @@ async function create() {
  });
  const data = await res.json();
  if (!res.ok) {
-    showResult(friendlyError(data), 'err');
+    showResult('Error: ' + (data.error || res.status), true);
    toast('Create failed', 'error');
    return;
  }
  const url = location.origin + '/' + (data.custom_slug || data.id);
-  showResult('<a href="' + url + '">' + url + '</a> <button class="btn btn-icon" id="result-copy" title="Copy URL" type="button">⧉</button>', 'ok');
+  showResult('<a href="' + url + '">' + url + '</a> <button class="btn btn-icon" id="result-copy" title="Copy URL" type="button">⧉</button>', false);
  $('result').dataset.token = data.deletion_token || '';
  const copyBtn = document.getElementById('result-copy');
  copyBtn.addEventListener('click', () => {
@@ -306,62 +252,6 @@ async function create() {
  location.href = dest;
 }
 $('create').addEventListener('click', create);
 // #4: can creation — POST multipart to /api/pastes/can. The main editor is
 // the first item; each extra can-item row is another text item.
 async function createCan() {
  const items = [];
  if (content.value.trim()) {
    items.push({title: $('title').value || 'main', content: content.value, language: $('language').value || ''});
  }
  document.querySelectorAll('#can-items .can-item-row').forEach(row => {
    const t = row.querySelector('.can-item-title').value.trim();
    const c = row.querySelector('.can-item-content').value;
    if (c.trim()) items.push({title: t || ('item-' + (items.length + 1)), content: c});
  });
  if (!items.length) { toast('Nothing to put in the can', 'error'); return; }
  const fd = new FormData();
  fd.append('title', $('title').value || 'Untitled can');
  fd.append('json_items', JSON.stringify(items));
  if ($('haspw').checked) fd.append('password', $('password').value);
  if ($('unlisted').checked) fd.append('visibility', 'unlisted');
  const exp = document.querySelector('input[name="exp"]:checked').value;
  if (exp === 'custom') {
    const dur = composeCustomExpiry();
    if (dur === null) { toast('Check the custom expiry', 'error'); return; }
    if (dur) fd.append('expires_in', dur);
  } else if (exp) {
    fd.append('expires_in', exp);
  }
  if ($('custom').value.trim()) fd.append('custom_slug', $('custom').value.trim());
  const res = await fetch('/api/pastes/can', {method: 'POST', body: fd});
  const data = await res.json();
  if (!res.ok) {
    showResult(friendlyError(data), 'err');
    toast('Can create failed', 'error');
    return;
  }
  const url = location.origin + data.url;
  showResult('<a href="' + url + '">' + url + '</a> <button class="btn btn-icon" id="result-copy" title="Copy URL" type="button">⧉</button>', 'ok');
  const copyBtn = document.getElementById('result-copy');
  copyBtn.addEventListener('click', () => {
    try {
      navigator.clipboard.writeText(url);
      copyBtn.classList.add('ok');
      copyBtn.textContent = 'Success!';
      setTimeout(() => { copyBtn.classList.remove('ok'); copyBtn.textContent = '⧉'; }, 2000);
    } catch(e) { toast('Copy failed', 'error'); }
  });
  // password-protected can: unlock now with the password we already have (#26 parity)
  if ($('haspw').checked && data.id) {
    const pd = new FormData();
    pd.append('password', $('password').value);
    try { await fetch('/can/' + data.id, {method: 'POST', body: pd}); } catch(e) {}
  }
  location.href = data.url;
 }
 // reset stale result state when returning via Back (bfcache) (#28)
 window.addEventListener('pageshow', e => {
  if (!e.persisted) return;
@@ -6,55 +6,8 @@
      <h1>Settings</h1>
    </div>
    <div class="settings-body">
-      <h3>Theme</h3>
+      <p>Settings are under construction.</p>
      <div class="theme-grid" id="theme-grid"></div>
      <p class="admin-link-row"><a class="admin-link" href="/admin">Admin</a></p>
    </div>
  </div>
 </div>
 <script>
 (function () {
  // #112: derive each preset's swatches from the real CSS variables in
  // app.css by temporarily applying data-preset, so they can never drift.
  var themeNames = [
    { id: 'midnight',        name: 'Midnight' },
    { id: 'smooth',          name: 'Smooth' },
    { id: 'pastel-lavender', name: 'Pastel Lavender' },
    { id: 'pastel-peach',    name: 'Pastel Peach' },
    { id: 'pastel-cloud',    name: 'Pastel Cloud' }
  ];
  var SWATCH_VARS = ['--bg', '--surface', '--surface-2', '--muted', '--accent'];
  function presetColors(id) {
    var root = document.documentElement;
    var prev = root.getAttribute('data-preset');
    root.setAttribute('data-preset', id);
    var cs = getComputedStyle(root);
    var colors = SWATCH_VARS.map(function (v) { return cs.getPropertyValue(v).trim(); });
    if (prev === null) root.removeAttribute('data-preset'); else root.setAttribute('data-preset', prev);
    return colors;
  }
  var grid = document.getElementById('theme-grid');
  var current = document.documentElement.dataset.preset || 'midnight';
  themeNames.forEach(function (t) {
    var colors = presetColors(t.id);
    var btn = document.createElement('button');
    btn.type = 'button';
    btn.className = 'theme-card';
    btn.setAttribute('aria-pressed', current === t.id ? 'true' : 'false');
    btn.innerHTML = '<strong>' + t.name + '</strong>' +
      '<span class="swatches">' + colors.map(function (c) {
        return '<span class="swatch" style="background:' + c + '"></span>';
      }).join('') + '</span>';
    btn.addEventListener('click', function () {
      document.documentElement.dataset.preset = t.id;
      try { localStorage.setItem('palette-theme', t.id); } catch (e) {}
      grid.querySelectorAll('.theme-card').forEach(function (c) { c.setAttribute('aria-pressed', 'false'); });
      btn.setAttribute('aria-pressed', 'true');
    });
    grid.appendChild(btn);
  });
 })();
 </script>
 {{template "foot" .}}
@@ -1,6 +0,0 @@
 package web
 // Version is the display version, set at build time via
 // -ldflags "-X palette/internal/web.Version=v0.2.1" (#93). Falls back to
 // "dev" for bare `go build` runs.
 var Version = "dev"
@@ -34,7 +34,6 @@ type UI struct {
 func New() (*UI, error) {
 	funcs := template.FuncMap{
 		"humanSize": humanSize,
 		"version":   func() string { return Version }, // #93: topbar version label
 	}
 	t, err := template.New("").Funcs(funcs).ParseFS(tmplFS, "templates/*.html")
 	if err != nil {
@@ -65,29 +64,6 @@ func (h *Handlers) renderPage(w http.ResponseWriter, name string, data any) {
 	}
 }
 // RenderPage is the exported wrapper used by the api package (#4 can pages).
 func (h *Handlers) RenderPage(w http.ResponseWriter, name string, data any) {
 	h.renderPage(w, name, data)
 }
 // WriteRateLimited is the exported rate-limit response used by the api package (#4).
 func (h *Handlers) WriteRateLimited(w http.ResponseWriter, retryAfterSecs int) {
 	h.writeRateLimited(w, retryAfterSecs)
 }
 // UnlockToken returns the per-id HMAC unlock token (cookie value, #34).
 // Exported for the api package so can pages share paste cookie semantics (#4).
 func UnlockToken(id string) string { return unlockToken(id) }
 // AgoString formats a relative "N ago" string (exported for the api package, #4).
 func AgoString(ts int64) string { return agoString(ts) }
 // HumanSize formats a byte count as a human string (exported for the api package, #4).
 func HumanSize(n int) string { return humanSize(n) }
 // ExpiryString formats remaining time until an epoch seconds expiry (#4).
 func ExpiryString(expiresAt int64) string { return expiryString(expiresAt) }
 // #34: per-paste unlock tokens. unlockSecret is generated once at startup
 // (also derivable from PALETTE_UNLOCK_SECRET for multi-instance deploys) and
 // used to HMAC paste ids, so a client can only hold a valid pw_<id> cookie by
@@ -269,22 +245,17 @@ func (h *Handlers) HandlePasteView(w http.ResponseWriter, r *http.Request) {
 		// one-time display of the deletion token via the created banner
 		http.SetCookie(w, &http.Cookie{Name: "tok_" + row.ID, Value: token, Path: "/", MaxAge: 60, HttpOnly: true, SameSite: http.SameSiteLaxMode})
 	}
-	// Count the view for real page renders, deduped per-viewer within the
+	// Count the view for every real page render. Raw views increment in
-	// burn window (#95): a reload by the same vwr cookie doesn't inflate
+	// handleRaw; the HTML path was missing its increment, so view_count only
-	// view_count. Raw views increment unconditionally in handleRaw (#49); the
+	// ever moved via /raw and the API-stored count stayed at 0 (#33).
-	// HTML path was missing its increment originally (#33). The just-created
+	// The just-created banner render does not count as a view.
 	// banner render does not count as a view.
 	if !justCreated {
-		h.Store.IncrementViews(row.ID, h.ViewerID(r), h.BurnWindowMin())
+		h.Store.IncrementViews(row.ID)
 	}
 	// #49: burn-after-N-reads budget (per-viewer dedupe window).
 	// Just-created first render does not count as a read for the creator.
 	if !justCreated {
-		rem, admitted := h.Store.RegisterRead(row, h.ViewerID(r), h.BurnWindowMin())
+		rem, _ := h.Store.RegisterRead(row, h.ViewerID(r), h.BurnWindowMin())
 		if !admitted { // #58: lost the burn claim; do not render content
 			http.NotFound(w, r)
 			return
 		}
 		h.renderPaste(w, row, false, "", rem)
 		return
 	}
@@ -304,16 +275,7 @@ func (h *Handlers) HandleHistoryPage(w http.ResponseWriter, r *http.Request) {
 // HandleSettingsPage serves /settings.
 func (h *Handlers) HandleSettingsPage(w http.ResponseWriter, r *http.Request) {
-	// #100: theme presets. Midnight is the default (no data-preset attribute),
+	h.renderPage(w, "settings.html", map[string]any{"Page": "settings"})
 	// so its swatches are hardcoded here; the CSS defines the token values.
 	themes := []map[string]any{
 		{"Name": "midnight", "Label": "Midnight", "Swatches": []string{"#241B30", "#2D2340", "#3A2D52", "#C4A8F0", "#F2EDF8"}},
 		{"Name": "smooth", "Label": "Smooth", "Swatches": []string{"#F6F5FA", "#FFFFFF", "#DAD7E6", "#7A7796", "#2A2A36"}},
 		{"Name": "pastel-lavender", "Label": "Pastel Lavender", "Swatches": []string{"#e6e0f5", "#f1edfa", "#cbb8e7", "#806bb8", "#3E3059"}},
 		{"Name": "pastel-peach", "Label": "Pastel Peach", "Swatches": []string{"#ffe0d6", "#fff0ea", "#ffc4a8", "#f9826c", "#4F2318"}},
 		{"Name": "pastel-cloud", "Label": "Pastel Cloud", "Swatches": []string{"#fff0f6", "#fff7fb", "#ffc8dd", "#a2d2ff", "#4A3355"}},
 	}
 	h.renderPage(w, "settings.html", map[string]any{"Page": "settings", "Themes": themes})
 }
 // HandleMinePage serves /mine.
@@ -328,25 +290,3 @@ func (h *Handlers) HandleAdminPage(w http.ResponseWriter, r *http.Request) {
 // Handlers builds a web.Handlers bound to this UI.
 func (u *UI) Handlers() *Handlers { return &Handlers{UI: u} }
 // #59: security headers for rendered HTML pages. Applied wherever the
 // response is text/html (page templates and the inline can page); JSON API
 // responses and /raw content pass through untouched. script-src allows
 // 'unsafe-inline' because the page templates carry inline scripts; CSP
 // default-src 'self' still blocks external content and object/frame embeds,
 // and frame-ancestors 'none' closes the clickjacking gap flagged in the #34
 // pentest. Runs after the handler so the Content-Type is already set.
 func SecurityHeaders(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		// Set before the handler runs: once a handler writes (template render
 		// flushes), header mutations are silently dropped. Setting the headers
 		// unconditionally is safe: CSP/nosniff/referrer on JSON or /raw bodies
 		// is harmless and arguably desirable.
 		h := w.Header()
 		h.Set("Content-Security-Policy",
 			"default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; frame-ancestors 'none'")
 		h.Set("Referrer-Policy", "no-referrer")
 		h.Set("X-Content-Type-Options", "nosniff")
 		next.ServeHTTP(w, r)
 	})
 }