Remove cans feature; harden pw_/tok_ cookie flags (pre-release fixes) (#307)

internal/web/static/app.css

@@ -694,26 +694,6 @@ a.admin-link:hover { color: var(--fg); text-decoration: underline; }
   .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); }
-/* #169: divider between the dropdown title and body must be persistent
-   (not hover dependent) and extend the full width of the card left and right */
-.can-item-body[open] summary {
-  border-bottom: 1px solid var(--border);
-  margin: 0 -14px 8px;
-  padding: 0 14px 8px;
-}
-.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; }
-
 /* ============================================================
    Styled controls (#123) — buttons, selects, checkboxes, radios
    match the custom URL box house pattern: 1px var(--border) on
@@ -892,7 +872,6 @@ button[type="submit"]:focus-visible,
 
 /* #139: CSP-safe replacements for inline style attributes (style-src 'self') */
 .hidden { display: none; }
-.can-page { max-width: 900px; width: 100%; }
 .col-a { width: 260px; } .col-b { width: 140px; } .col-c { width: 120px; }
 .col-d { width: 90px; } .col-d2 { width: 150px; } .col-e { width: 150px; }
 .col-f { width: 100px; } .col-g { width: 120px; }