feat(hub): dashboard SSE push, light-theme cards, simplify AI coach

Replace dashboard polling with backend SSE and snapshot refresh. Restyle for light/dark theme with soft card glow instead of neon. Remove Today's Summary from AI page; keep trading and general chat only. Update hub documentation.

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/hub.py

@@ -90,6 +90,8 @@ from url_public import browser_url, default_review_url, public_origin
 from urllib.parse import urlencode
 
 from hub_board_cache import HUB_BOARD_POLL_INTERVAL, board_store
+from hub_dashboard_cache import dashboard_store
+from hub_dashboard import DASHBOARD_POLL_INTERVAL_SEC
 from hub_chart_cache import (
     HUB_CHART_POLL_INTERVAL,
     HUB_CHART_WATCH_TTL_SEC,
@@ -271,6 +273,7 @@ async def _run_board_aggregate() -> dict:
 
 def _schedule_board_refresh() -> None:
     board_store.request_refresh()
+    dashboard_store.request_refresh()
 
 
 async def _run_archive_sync_once() -> dict:
@@ -470,6 +473,7 @@ async def _archive_sync_loop() -> None:
 async def _hub_lifespan(_app: FastAPI):
     global _archive_sync_stop, _archive_sync_task, _volume_rank_stop, _volume_rank_task
     await board_store.start(_run_board_aggregate)
+    await dashboard_store.start(_run_dashboard_aggregate)
     await chart_poll_store.start(_run_chart_poll)
     _archive_sync_stop = asyncio.Event()
     _archive_sync_task = asyncio.create_task(_archive_sync_loop(), name="hub-archive-sync")
@@ -499,6 +503,7 @@ async def _hub_lifespan(_app: FastAPI):
             _volume_rank_task = None
         _volume_rank_stop = None
         await chart_poll_store.stop()
+        await dashboard_store.stop()
         await board_store.stop()
 
 
@@ -667,9 +672,26 @@ from hub_dashboard import build_dashboard_payload, default_trading_day
 app.include_router(create_hub_ai_router(load_all_exchanges=_all_exchanges_for_ai))
 
 
+async def _run_dashboard_aggregate() -> dict:
+    try:
+        return await asyncio.to_thread(
+            build_dashboard_payload,
+            _all_exchanges_for_ai(),
+            trading_day=default_trading_day(),
+        )
+    except Exception as exc:
+        return {"ok": False, "msg": str(exc), "error": "aggregate_failed"}
+
+
+def _schedule_dashboard_refresh() -> None:
+    dashboard_store.request_refresh()
+
+
 @app.get("/api/dashboard/daily")
 def api_dashboard_daily(trading_day: str = ""):
     day = (trading_day or "").strip()[:10] or default_trading_day()
+    if not (trading_day or "").strip():
+        return dashboard_store.snapshot_dict()
     try:
         payload = build_dashboard_payload(
             _all_exchanges_for_ai(),
@@ -677,7 +699,28 @@ def api_dashboard_daily(trading_day: str = ""):
         )
     except Exception as exc:
         raise HTTPException(status_code=502, detail=str(exc)) from exc
-    return payload
+    return {**payload, "dashboard_version": dashboard_store.version}
+
+
+@app.get("/api/dashboard/stream")
+async def api_dashboard_stream():
+    from fastapi.responses import StreamingResponse
+
+    return StreamingResponse(
+        dashboard_store.iter_sse(),
+        media_type="text/event-stream",
+        headers={
+            "Cache-Control": "no-cache",
+            "Connection": "keep-alive",
+            "X-Accel-Buffering": "no",
+        },
+    )
+
+
+@app.post("/api/dashboard/refresh")
+async def api_dashboard_refresh():
+    _schedule_dashboard_refresh()
+    return {"ok": True, "dashboard_version": dashboard_store.version}
 
 
 @app.get("/trade")
@@ -2122,7 +2165,7 @@ def api_ping():
         "service": "manual-trading-hub",
         "build": HUB_BUILD,
         "trade_ui": False,
-        "features": ["monitor", "settings", "auth", "board_sse", "archive", "dashboard", "funds"],
+        "features": ["monitor", "settings", "auth", "board_sse", "dashboard_sse", "archive", "dashboard", "funds"],
         "board_poll_interval_sec": HUB_BOARD_POLL_INTERVAL,
         "board_version": board_store.version,
         "board_aggregating": board_store.aggregating,
@@ -2130,6 +2173,13 @@ def api_ping():
         if isinstance(board_store.payload, dict)
         else None,
         "board_error": board_store.last_error,
+        "dashboard_poll_interval_sec": DASHBOARD_POLL_INTERVAL_SEC,
+        "dashboard_version": dashboard_store.version,
+        "dashboard_aggregating": dashboard_store.aggregating,
+        "dashboard_updated_at": (dashboard_store.payload or {}).get("updated_at")
+        if isinstance(dashboard_store.payload, dict)
+        else None,
+        "dashboard_error": dashboard_store.last_error,
         "password_required": password_required(),
         "env_disabled_ids": sorted(env_force_disabled_ids()),
         "hub_disabled_ids_raw": (os.getenv("HUB_DISABLED_IDS") or ""),