Stacks on COD-38: accumulates a per-session attachment history and exposes it
through a slide-in drawer with an unread badge, so attachments stay reachable
after their cards are dismissed.
Backend:
- session-attachment-history: history state — dedupe by source path / relative
path, newest-first, 100-item cap, and externalPath sanitization (the absolute
host path is server-private and never leaves toState()).
- session.ts: _attachmentHistory + getter (sanitized) / upsert / restore /
getAttachmentHistoryForPersist; restored from saved state in the constructor.
- file-routes: GET /attachments (list — resolves each entry to live metadata +
routes; external entries are re-registered) and GET /attachments/:id
(metadata poll). The by-id route guards via the registry's TOCTOU-safe
resolveServableAttachmentPath.
- server.ts: detected/registered attachments upsert into history and persist;
the private (externalPath-bearing) history rides on disk under
__attachmentHistory, separate from the sanitized public copy, and is restored
on mux-session recovery.
- types/session.ts: SessionAttachmentHistoryItem + SessionState.attachmentHistory.
Frontend:
- panels-ui: the drawer (lazy-built), unread badge, list render with per-item
preview/download/open/"Card" (reshow) actions, and live refresh of the open
drawer on new detections.
- app.js: history state + per-session badge/cleanup wiring.
- index.html / styles.css / mobile.css: header button + badge and the drawer.
Verified: tsc / eslint / prettier / frontend-syntax / public-assets clean; new
history-module unit tests pass; full test:ci green (2866 passed); badge, drawer
open/render/reshow/close verified in-browser.
Aamer Akhter
577b6d7384