feat: kanban status buttons, task back-nav, RSS UI, weather search, briefing fixes

Project view:
- Add inline status advance buttons on kanban task cards (todo→in_progress,
  in_progress→done); buttons reveal on hover, stop link navigation

Task viewer:
- Back button navigates to task's project instead of /tasks when project_id set
- Esc key navigates to project (or /tasks); blurs focused element first

Quick capture:
- Use user's configured model instead of hardcoded Config.OLLAMA_MODEL
- Remove create_project from classifier prompt (tool not offered, caused
  task-shaped inputs to silently fall through to note fallback)

Briefing scheduler:
- Fix get_event_loop() → get_running_loop() so background thread uses the
  correct hypercorn event loop (jobs were scheduling but never executing)
- Suppress bare greeting when both LLM synthesis lanes return empty

RSS feed UI (SettingsView):
- Show last-fetched age, category badge, and feed URL per row
- Category input field when adding a feed
- Refresh all button: fetches latest items, reloads list, toasts with count
- Enter key submits add-feed form; better empty-state hint with example feeds

Weather tool:
- Accept any city/region name in addition to 'home'/'work'/'all'
- Geocodes via Nominatim + fetches live from Open-Meteo for arbitrary queries

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

src/fabledassistant/services/tools.py

@@ -530,16 +530,19 @@ _CORE_TOOLS = [
         "function": {
             "name": "get_weather",
             "description": (
-                "Get the current 7-day weather forecast for the user's configured locations. "
-                "Returns temperature, precipitation, and conditions for each day. "
-                "Also reports any changes since the last forecast was fetched."
+                "Get the 7-day weather forecast. Pass a city/region name to look up any location, "
+                "or omit to get the user's configured home/work locations. "
+                "Returns temperature, precipitation, and conditions for each day."
             ),
             "parameters": {
                 "type": "object",
                 "properties": {
-                    "location_key": {
+                    "location": {
                         "type": "string",
-                        "description": "Which location to focus on: 'home', 'work', or 'all'. Defaults to 'all'.",
+                        "description": (
+                            "City, region, or country to look up — e.g. 'Portland, Oregon', 'Tokyo', 'home', 'work'. "
+                            "Use 'home' or 'work' to get the user's saved locations. Omit for all saved locations."
+                        ),
                     }
                 },
                 "required": [],
@@ -1646,11 +1649,31 @@ async def execute_tool(user_id: int, tool_name: str, arguments: dict) -> dict:
             return {"success": True, "log": log.to_dict(), "task": note.title}
 
         elif tool_name == "get_weather":
-            from fabledassistant.services.weather import get_cached_weather
-            location_key = arguments.get("location_key", "all")
+            from fabledassistant.services.weather import (
+                get_cached_weather, geocode, _fetch_open_meteo, parse_forecast
+            )
+            from datetime import datetime, timezone as _tz
+            location = (arguments.get("location") or "").strip()
+            _known = {"home", "work", "all", ""}
+            if location.lower() not in _known:
+                # Live geocode + fetch for arbitrary city
+                try:
+                    lat, lon, label = await geocode(location)
+                    raw = await _fetch_open_meteo(lat, lon)
+                    days = parse_forecast(raw)
+                    return {"data": {"locations": [{
+                        "location_key": "query",
+                        "location_label": label,
+                        "fetched_at": datetime.now(_tz.utc).isoformat(),
+                        "days": days,
+                        "changes_since_last_fetch": [],
+                    }]}}
+                except Exception as e:
+                    return {"success": False, "error": f"Could not get weather for '{location}': {e}"}
+            # Fall back to cached configured locations
             locations = await get_cached_weather(user_id)
-            if location_key != "all":
-                locations = [loc for loc in locations if loc["location_key"] == location_key]
+            if location.lower() not in ("all", ""):
+                locations = [loc for loc in locations if loc["location_key"] == location.lower()]
             return {"data": {"locations": locations}}
 
         elif tool_name == "get_rss_items":