Merge pull request '#257: size line number gutter to widest number' (#266) from fix-257 into dev

The paste gutter was pinned to a fixed 3ch width. With box-sizing:
border-box that leaves only ~19px of content after the 10px+10px side
padding, so 2+ digit line numbers overflow right into the code text
(owner-visible from line 10, worst at 100+).

paste-lines.js now sets the gutter width to calc(Nch + 20px), where N is
the digit count of the highest line number, via CSSOM (CSP forbids
inline style attributes). Numbers were already right-aligned; the column
now matches the width of the biggest number. The width is only written
when it changes, so the resize-observer/renumber loop keeps a stable
fixed point.

internal/api/issue138_cookie_test.go

@@ -29,7 +29,7 @@ func newTestServer138(t *testing.T) *httptest.ResponseRecorder {
 	globalSettingsFn = ss.get
 	t.Cleanup(func() { globalSettingsFn = nil })
 	a := &apiServer{store: st, cfg: cfg, ui: ui, settings: ss, adminKey: "test-admin-key"}
-	req := httptest.NewRequest("GET", "/history", nil)
+	req := httptest.NewRequest("GET", "/public", nil)
 	rec := httptest.NewRecorder()
 	a.routes().ServeHTTP(rec, req)
 	return rec

internal/api/mine_test.go

@@ -58,7 +58,7 @@ func TestMineCreateListDelete(t *testing.T) {
 	a := &apiServer{store: st, cfg: cfg, ui: ui, settings: ss, adminKey: "test-admin-key"}
 	h := a.routes()
 
-	alice := viewerCookieFor(t, h, "/history")
+	alice := viewerCookieFor(t, h, "/public")
 	if alice == "" {
 		t.Fatal("no viewer cookie issued")
 	}
@@ -89,7 +89,7 @@ func TestMineCreateListDelete(t *testing.T) {
 	}
 
 	// a different browser's cookie does NOT see it
-	bob := viewerCookieFor(t, h, "/history")
+	bob := viewerCookieFor(t, h, "/public")
 	rec = doReq(t, h, "GET", "/api/mine", bob, "")
 	json.Unmarshal(rec.Body.Bytes(), &list)
 	if list.Total != 0 {

internal/api/routes_rename_test.go

@@ -0,0 +1,52 @@
+package api
+
+// #256: renamed page routes; old URLs redirect.
+import (
+	"palette/internal/store"
+	"palette/internal/web"
+
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestRenamedPageRoutes(t *testing.T) {
+	globalLimiter = newLimiter() // fresh rate-limit buckets
+	st, err := store.OpenStore(":memory:")
+	if err != nil {
+		t.Fatal(err)
+	}
+	ui, err := web.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	cfg := Config{MaxTextBytes: 5 * 1024 * 1024}
+	ss := NewTestSettingsStore(t, cfg)
+	globalSettingsFn = ss.get
+	t.Cleanup(func() { globalSettingsFn = nil })
+	a := &apiServer{store: st, cfg: cfg, ui: ui, settings: ss, adminKey: "test-admin-key"}
+	h := a.routes()
+
+	// new routes render pages
+	for _, path := range []string{"/public", "/saved"} {
+		req := httptest.NewRequest("GET", path, nil)
+		rec := httptest.NewRecorder()
+		h.ServeHTTP(rec, req)
+		if rec.Code != http.StatusOK {
+			t.Fatalf("GET %s: %d, want 200", path, rec.Code)
+		}
+	}
+
+	// old routes redirect
+	for _, tc := range [][2]string{{"/history", "/public"}, {"/mine", "/saved"}, {"/", "/public"}} {
+		req := httptest.NewRequest("GET", tc[0], nil)
+		rec := httptest.NewRecorder()
+		h.ServeHTTP(rec, req)
+		if rec.Code != http.StatusMovedPermanently && rec.Code != http.StatusFound {
+			t.Fatalf("GET %s: %d, want redirect", tc[0], rec.Code)
+		}
+		if loc := rec.Header().Get("Location"); loc != tc[1] {
+			t.Fatalf("GET %s redirects to %s, want %s", tc[0], loc, tc[1])
+		}
+	}
+}

internal/api/server.go

@@ -118,11 +118,14 @@ func (a *apiServer) routes() http.Handler {
 	r.Get("/raw/{id}", a.handleRaw)
 
 	// web pages
-	r.Get("/", http.RedirectHandler("/history", http.StatusFound).ServeHTTP)
+	r.Get("/", http.RedirectHandler("/public", http.StatusFound).ServeHTTP)
 	r.Get("/new", a.ui.Handlers().HandleNewPage)
-	r.Get("/history", a.ui.Handlers().HandleHistoryPage)
+	r.Get("/public", a.ui.Handlers().HandleHistoryPage)
+	r.Get("/saved", a.ui.Handlers().HandleMinePage)
 	r.Get("/settings", a.ui.Handlers().HandleSettingsPage)
-	r.Get("/mine", a.ui.Handlers().HandleMinePage)
+	// #256: old URLs redirect to the renamed pages
+	r.Get("/history", http.RedirectHandler("/public", http.StatusMovedPermanently).ServeHTTP)
+	r.Get("/mine", http.RedirectHandler("/saved", http.StatusMovedPermanently).ServeHTTP)
 	r.Handle("/static/*", a.ui.StaticHandler())
 	r.Get("/unlock/{id}", a.handlePasteView)
 	r.Post("/unlock/{id}", a.handlePasteView)

internal/store/attachment.go

@@ -26,7 +26,10 @@ type Attachment struct {
 	SizeHuman string `json:"-"` // template-only: human-readable size
 }
 
-const MaxFilenameLen = 255
+// MaxFilenameLen caps stored attachment filenames (bytes) to bound DB
+// rows and Content-Disposition echoes. 128 keeps names readable while
+// stopping filename-bloat abuse; longer names truncate.
+const MaxFilenameLen = 128
 
 // ErrFileTooLarge is returned when an attachment exceeds the per-file cap.
 var ErrFileTooLarge = errors.New("file too large")

internal/store/blob_test.go

@@ -105,4 +105,9 @@ func TestSanitizeFilename(t *testing.T) {
 	if got := SanitizeFilename(long); len(got) != MaxFilenameLen {
 		t.Errorf("long name len = %d want %d", len(got), MaxFilenameLen)
 	}
+	// issue #248: a 250-char multipart filename must truncate to the cap
+	repro := strings.Repeat("b", 246) + ".txt"
+	if got := SanitizeFilename(repro); len(got) != MaxFilenameLen {
+		t.Errorf("repro name len = %d want %d", len(got), MaxFilenameLen)
+	}
 }

internal/store/customslug.go

@@ -13,6 +13,7 @@ var reservedSlugs = map[string]bool{
 	"api": true, "raw": true, "can": true, "cans": true, "public": true,
 	"history": true, "static": true, "assets": true, "favicon.ico": true,
 	"new": true, "login": true, "logout": true, "admin": true, "settings": true,
+	"mine": true, "saved": true, "unlock": true, "guess": true, "f": true,
 }
 
 var ErrInvalidSlug = errors.New("custom slug must be 1-64 chars: letters, digits, dash, underscore; must start with letter or digit")

internal/web/static/new.js

@@ -9,6 +9,8 @@ function updateGutter() {
   gutter.textContent = s;
 }
 content.addEventListener('input', updateGutter);
+// #259: the editor scrolls itself; keep the gutter's numbers in step with it.
+content.addEventListener('scroll', () => { gutter.scrollTop = content.scrollTop; });
 updateGutter();
 
 function toast(msg, kind) {
@@ -197,7 +199,7 @@ function finishCreate(data) {
     try {
       navigator.clipboard.writeText(url);
       copyBtn.classList.add('ok');               // in-place success feedback (#53)
-      copyBtn.textContent = 'Success!';
+      copyBtn.textContent = '✓';
       setTimeout(() => { copyBtn.classList.remove('ok'); copyBtn.textContent = '⧉'; }, 2000);
     } catch(e) { toast('Copy failed', 'error'); }
   });

internal/web/static/paste-lines.js

@@ -44,6 +44,23 @@
   // measured, not derived from span counts or heights.
   function renumber() {
     var lines = body.querySelectorAll('.codeline');
+    // #257: size the gutter column to the widest line number so numbers in
+    // the 100s+ fit their own column instead of bleeding into the code text.
+    // The gutter is box-sizing: border-box, so the column width must be the
+    // digits PLUS the 10px left + 10px right padding; at the CSS default 3ch
+    // the padding alone leaves only ~19px of content, and any 2+ digit
+    // number overflows into the code. Numbers are right-aligned, and the
+    // width below fits the widest number exactly. Set via CSSOM (CSP
+    // forbids inline style attributes). Only touch the width when it
+    // changes: the resize observer below re-runs renumber() when the gutter
+    // width reflows the code column, and rewriting the same value would
+    // ping-pong the fixed point forever.
+    var digits = String(lines.length || 1).length;
+    var w = 'calc(' + digits + 'ch + 20px)';
+    if (gutter.style.width !== w) {
+      gutter.style.minWidth = w;
+      gutter.style.width = w;
+    }
     if (!wrapOn() || !lines.length) {
       // wrap OFF: one number per logical line (pre-existing behavior,
       // including the gutter scrolling with horizontal scroll).

internal/web/static/paste.js

@@ -20,7 +20,7 @@ function copyFeedback(btn) {
   if (!btn) return;
   if (!btn.dataset.label) btn.dataset.label = btn.textContent; // remember the original label (Copy/Link)
   btn.classList.add('ok');
-  btn.textContent = 'Success!';
+  btn.textContent = '✓';
   clearTimeout(btn._okh);
   btn._okh = setTimeout(() => { btn.classList.remove('ok'); btn.textContent = btn.dataset.label; }, 2000);
 }
@@ -42,7 +42,7 @@ function redeem() {
   try { tok = sessionStorage.getItem('deletion_token_' + PASTE_ID) || ''; } catch(e) {}
   if (!tok) { alert('deletion token not available in this browser'); return; }
   fetch('/api/pastes/' + PASTE_ID + '/redeem', {method: 'DELETE', headers: {'Authorization': 'Bearer ' + tok}})
-    .then(r => { if (r.ok) location.href = '/history'; else alert('delete failed'); });
+    .then(r => { if (r.ok) location.href = '/public'; else alert('delete failed'); });
 }
 
 // wiring (moved from inline handlers for CSP #139)

internal/web/templates/layout.html

@@ -8,11 +8,11 @@
 
 {{define "topbar"}}
   <div class="topbar">
-    <a class="logo" href="/history">Palette <em>/ {{ version }}</em></a>
+    <a class="logo" href="/public">Palette <em>/ {{ version }}</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>
+      <a href="/public" {{if eq .Page "public"}}class="on"{{end}}>Public</a>
-      <a href="/mine" {{if eq .Page "mine"}}class="on"{{end}}>Saved</a>
+      <a href="/saved" {{if eq .Page "saved"}}class="on"{{end}}>Saved</a>
       <a href="https://git.archfox.org/poslop/palette" target="_blank" rel="noopener">Git<svg class="ext" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6"/><polyline points="15 3 21 3 21 9"/><line x1="10" y1="14" x2="21" y2="3"/></svg></a>
     </nav>
     <div class="spacer"></div>

internal/web/templates/paste.html

@@ -50,7 +50,7 @@
     </div>
   </div>
   {{end}}
-  {{if not .AttachmentImage}}
+  {{if not .Attachment}}
   <div class="float">
     <div class="code" id="code"><div class="gutter" id="gutter">{{.Gutter}}</div><div class="codebody" id="codebody">{{.ContentHTML}}</div></div>
   </div>

internal/web/web.go

@@ -433,9 +433,9 @@ func (h *Handlers) HandleNewPage(w http.ResponseWriter, r *http.Request) {
 	h.renderPage(w, "new.html", map[string]any{"Page": "new"})
 }
 
-// HandleHistoryPage serves /history.
+// HandleHistoryPage serves /public.
 func (h *Handlers) HandleHistoryPage(w http.ResponseWriter, r *http.Request) {
-	h.renderPage(w, "history.html", map[string]any{"Page": "history"})
+	h.renderPage(w, "history.html", map[string]any{"Page": "public"})
 }
 
 // HandleSettingsPage serves /settings.
@@ -452,9 +452,9 @@ func (h *Handlers) HandleSettingsPage(w http.ResponseWriter, r *http.Request) {
 	h.renderPage(w, "settings.html", map[string]any{"Page": "settings", "Themes": themes})
 }
 
-// HandleMinePage serves /mine.
+// HandleMinePage serves /saved.
 func (h *Handlers) HandleMinePage(w http.ResponseWriter, r *http.Request) {
-	h.renderPage(w, "mine.html", map[string]any{"Page": "mine"})
+	h.renderPage(w, "mine.html", map[string]any{"Page": "saved"})
 }
 
 // HandleAdminPage serves /admin.