feat(stats): optimize dashboard data loading with internal ui endpoints

README.md

@@ -32,6 +32,7 @@ The service exposes a clean HTTP API, provides workflow metrics, persists state
 - CSV export with injection protection
 - Persistent storage (`data/tasks.json`)
 - HTML dashboard (`/stats`)
+- Lightweight dashboard data loading via internal `/ui_data/*` routes
 - Atomic file writes with corruption recovery
 
 ---
@@ -194,6 +195,8 @@ HTML page:
 - Top block:
   - Selected task details:
     - Title
+    - Status
+    - Created datetime
     - Start datetime
     - Done datetime
     - Cycle time
@@ -204,6 +207,53 @@ HTML page:
     - In Progress
     - Done
 
+Implementation notes:
+
+- `/stats` returns a lightweight HTML shell
+- Task lists are loaded separately from an internal UI endpoint
+- Selected task details are loaded on demand when a card is selected
+- Full task payloads are not embedded into the HTML for every card
+
+### Internal UI Data Routes
+
+These routes are used only by the HTML dashboard and are intentionally hidden from Swagger / OpenAPI.
+
+#### Board data
+
+```
+GET /ui_data/stats/board
+```
+
+Returns lightweight task list items grouped by status:
+
+- `backlog_tasks`
+- `in_progress_tasks`
+- `done_tasks`
+
+Each list item contains only:
+
+- `id`
+- `title`
+- `status`
+- `display_date_label`
+- `display_date_value`
+
+#### Task details
+
+```
+GET /ui_data/tasks/{id}
+```
+
+Returns the full details needed for the selected-task panel:
+
+- `id`
+- `title`
+- `status`
+- `created_at`
+- `started_at`
+- `done_at`
+- `cycle_time`
+
 ---
 
 ## Error Format