feat(ui): Jira-style card detail, edit-mode column management, design polish

project-context.md

@@ -45,15 +45,15 @@ The product is intentionally small: one Go binary serves both the JSON API and t
 - `web/src/api.ts`: typed fetch client (`APIError` class, `request<T>` helper). All calls are same-origin under `/api`.
 - `web/src/board-state.ts`: `useReducer` board state — owns the `Board` snapshot, `loading`, `error`, and `toasts`. Pure action creators/reducers for add/update/remove list & card and optimistic transforms, plus rollback support.
 - `web/src/drag.ts`: native HTML5 drag-and-drop helpers — `cardDragType` MIME, `beginCardDrag`/`readCardDrag` payloads, and `movePosition` (computes the new fractional position between drop neighbours).
-- `web/src/App.tsx`: top-level component. Loads the board on mount (`GET /api/board`), owns the reducer, wires optimistic mutations with rollback + toasts, and renders `Header` + `BoardCanvas` + `Toasts`.
-- `web/src/components/Header.tsx`: brand wordmark, "Haven homelab / My board" label, and reload button.
-- `web/src/components/BoardCanvas.tsx`: horizontally-scrolling list rail, inline "add list" affordance, and the empty/loading states. Maps lists to `ListColumn`.
-- `web/src/components/ListColumn.tsx`: one column — inline list-name edit, card count, drop zones (one before each card + one at the end), inline add-card input, and per-list delete confirmation.
-- `web/src/components/CardItem.tsx`: one draggable card — click-to-edit title, done toggle, expand to `CardEditor`, and delete confirmation.
-- `web/src/components/CardEditor.tsx`: description editor and destructive (delete) action for a card.
+- `web/src/App.tsx`: top-level component. Loads the board on mount (`GET /api/board`), owns the reducer and selected-card/list-management UI state, wires optimistic mutations with rollback + toasts, and renders `Header`, `BoardCanvas`, the selected card's `CardDetailModal`, and `Toasts`.
+- `web/src/components/Header.tsx`: brand wordmark, "Haven homelab / My board" label, reload button, and the active/inactive Edit toggle for list management.
+- `web/src/components/BoardCanvas.tsx`: responsive horizontally-scrolling list rail, management-mode-only add-list affordance, and board empty state. Maps lists to `ListColumn`.
+- `web/src/components/ListColumn.tsx`: one column — card count, native drop zones (one before each card + one at the end), inline add-card input, empty-column state, and management-mode-only list rename/delete controls with delete confirmation.
+- `web/src/components/CardItem.tsx`: one draggable card tile. A genuine click opens the board-level detail dialog; drag events are suppressed from opening it. It retains the done toggle, title/description preview, and a visible drag grip.
+- `web/src/components/CardDetailModal.tsx`: accessible Jira-style card dialog with inline title and description editing, list/status properties, timestamps, delete confirmation, outside/Escape/X close controls, and modal focus restoration.
 - `web/src/components/ConfirmDialog.tsx`: accessible confirmation dialog used before any delete.
 - `web/src/components/Toast.tsx`: non-blocking toast notifications (auto-dismiss ~4.4s).
-- `web/src/styles.css`: all styling. Dark "Haven" theme (deep slate/navy `#0a1020`, teal/indigo accents), CSS custom properties, rounded surfaces, soft shadows, focus rings, and `prefers-reduced-motion` support. 44px touch targets for mobile.
+- `web/src/styles.css`: all styling. Elevated dark "Haven" theme (deep slate/navy `#0a1020`, teal/indigo accents), responsive horizontal board rail, polished card/list/button states, edit-mode treatment, detail-dialog layout, empty states, focus rings, 44px mobile touch targets, and `prefers-reduced-motion` support.
 
 ### Embedding bridge
 
@@ -109,7 +109,9 @@ Error shape: `{ "error": { "code": "validation_error"|"not_found"|..., "message"
 
 - Loads `/api/board` on mount; no board picker (single fixed board).
 - Native HTML5 drag-and-drop reorders cards within and across lists; drop computes a fractional position, updates optimistically, and reconciles/rolls back on failure.
-- Inline add/edit for lists and cards, done toggle, descriptions, delete-with-confirm.
+- Clicking a card opens a centered, accessible Jira-style detail dialog. Its title and description patch independently, while list, done status, created/updated timestamps, and delete-with-confirm are visible in the dialog. It closes via X, Escape, or outside click, focuses on open, and restores the prior trigger focus when closed.
+- The Header's Edit toggle enters list-management mode. Only in that mode are list rename/delete controls and the end-of-rail add-list control visible; card add, done, detail editing, delete, and drag-and-drop remain available in either mode.
+- Inline add for cards, done toggle, descriptions, and delete-with-confirm. There is no inline card expansion/editor; card editing is centralized in the detail dialog.
 - Optimistic UI: every mutation updates state immediately, then reconciles with the server response; failures restore the prior snapshot and show an error toast. Only the pending resource's controls disable.
 - Responsive horizontally-scrolling board; usable on phones.