Workspace polish: milestone selector, streaming fix, push fix, log quieting

- WorkspaceTaskPanel: add milestone <select> in task detail (PATCH /api/notes/:id),
  replace delete ✕ with trash can SVG icon
- WorkspaceView: scroll to bottom when streaming ends so final message is visible
  without a page refresh
- ToolCallCard: fix search_notes result count (was reading data.total; tool returns
  data.count), so results no longer show "0 found"
- push.py: switch from deprecated WebPusher().send(vapid_private_key=...) to
  webpush() function (pywebpush 2.x API compatibility)
- app.py: downgrade /api/health, /api/chat/status, and static asset requests from
  INFO to DEBUG in after_request logger to reduce log noise at default log level

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/fabledassistant/services/push.py

@@ -23,8 +23,8 @@ _VAPID_KEYS_FILE = Path(Config.IMAGE_CACHE_DIR).parent / "vapid_keys.json"
 def _get_webpush():
     """Lazy import to avoid startup errors if pywebpush is not installed."""
     try:
-        from pywebpush import WebPusher
-        return WebPusher
+        from pywebpush import webpush
+        return webpush
     except ImportError:
         return None
 
@@ -156,8 +156,8 @@ async def send_push_notification(
         logger.debug("VAPID not configured, skipping push notification")
         return
 
-    WebPusher = _get_webpush()
-    if WebPusher is None:
+    webpush = _get_webpush()
+    if webpush is None:
         logger.warning("pywebpush not installed, cannot send push notifications")
         return
 
@@ -182,7 +182,8 @@ async def send_push_notification(
                 "endpoint": sub.endpoint,
                 "keys": {"p256dh": sub.p256dh, "auth": sub.auth},
             }
-            response = WebPusher(subscription_info).send(
+            response = webpush(
+                subscription_info=subscription_info,
                 data=payload,
                 vapid_private_key=Config.VAPID_PRIVATE_KEY,
                 vapid_claims=vapid_claims,