feat(weather): add refresh button and return card data from refresh endpoint

Add a refresh button (↻) to the weather section header in BriefingView so
users can manually re-fetch weather data (needed after deploying the hourly
precip changes to populate the cache). Update the existing POST
/api/briefing/weather/refresh endpoint to return full card data instead of
just location keys.

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

src/fabledassistant/routes/briefing.py

@@ -167,6 +167,7 @@ async def get_weather():
     return jsonify({"locations": cards, "temp_unit": temp_unit})
 
 
+
 @briefing_bp.route("/weather/current", methods=["GET"])
 @_REQUIRE
 async def get_current_weather():
@@ -225,11 +226,14 @@ async def refresh_weather():
     raw = await get_setting(g.user.id, "briefing_config", "{}")
     try:
         config = json.loads(raw) if isinstance(raw, str) else {}
+        temp_unit = config.get("temp_unit", "C")
+        if temp_unit not in ("C", "F"):
+            temp_unit = "C"
     except Exception:
         config = {}
+        temp_unit = "C"
 
     locations = config.get("locations", {})
-    refreshed = []
     for key, loc in locations.items():
         if not loc.get("lat") or not loc.get("lon"):
             continue
@@ -241,11 +245,15 @@ async def refresh_weather():
                 lat=loc["lat"],
                 lon=loc["lon"],
             )
-            refreshed.append(key)
         except Exception:
             logger.warning("Failed to refresh weather for %s", key, exc_info=True)
 
-    return jsonify({"refreshed": refreshed})
+    rows = await weather_svc.get_cached_weather_rows(g.user.id)
+    cards = [
+        card for row in rows
+        if (card := weather_svc.parse_weather_card_data(row, temp_unit)) is not None
+    ]
+    return jsonify({"locations": cards, "temp_unit": temp_unit})
 
 
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