feat(weather): add hourly precipitation summaries and peak timing to weather card

Fetch hourly precipitation probabilities from Open-Meteo alongside daily
forecasts. Generate human-readable precip summaries ("Rain likely 2–5 PM",
"Rain likely all day") for today and each forecast day. Display today's
summary as a styled callout and show peak precipitation hour in forecast rows.
Also fix briefing pipeline to parse all weather location rows (not just first).

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

tests/test_weather_service.py

@@ -59,7 +59,6 @@ def test_detect_forecast_changes_rain_added():
 def test_parse_weather_card_data_returns_none_when_stale():
     """Should return None when cache is older than 24 hours."""
     from datetime import datetime, timezone, timedelta
-    from unittest.mock import MagicMock
     from fabledassistant.services.weather import parse_weather_card_data
 
     cache = MagicMock()
@@ -71,7 +70,6 @@ def test_parse_weather_card_data_returns_none_when_stale():
 def test_parse_weather_card_data_returns_card_schema():
     """Should return the correct metadata.weather schema for fresh cache."""
     from datetime import datetime, timezone, timedelta, date
-    from unittest.mock import MagicMock
     from fabledassistant.services.weather import parse_weather_card_data
 
     today = date.today().isoformat()
@@ -103,3 +101,66 @@ def test_parse_weather_card_data_returns_card_schema():
     assert card["yesterday_low"] == 9
     assert len(card["forecast"]) >= 1
     assert card["location"] == "Berlin, DE"
+    assert card["precip_summary"] is None
+
+
+def test_summarize_precip_dry():
+    from fabledassistant.services.weather import _summarize_precip
+    assert _summarize_precip([(h, 10) for h in range(24)]) is None
+
+
+def test_summarize_precip_all_day():
+    from fabledassistant.services.weather import _summarize_precip
+    result = _summarize_precip([(h, 60) for h in range(24)])
+    assert result is not None
+    assert "all day" in result.lower()
+
+
+def test_summarize_precip_window():
+    from fabledassistant.services.weather import _summarize_precip
+    hourly = [(h, 5) for h in range(24)]
+    for h in range(14, 18):
+        hourly[h] = (h, 65)
+    result = _summarize_precip(hourly)
+    assert result is not None
+    assert "2 PM" in result
+    assert "65%" in result
+
+
+def test_parse_weather_card_includes_hourly_precip_summary():
+    from datetime import datetime, timezone, timedelta, date
+    from fabledassistant.services.weather import parse_weather_card_data
+
+    today = date.today().isoformat()
+    yesterday = (date.today() - timedelta(days=1)).isoformat()
+    tomorrow = (date.today() + timedelta(days=1)).isoformat()
+
+    hourly_times = [f"{today}T{h:02d}:00" for h in range(24)]
+    hourly_probs = [5] * 24
+    for h in range(14, 18):
+        hourly_probs[h] = 70
+
+    cache = MagicMock()
+    cache.fetched_at = datetime.now(timezone.utc)
+    cache.location_label = "Berlin, DE"
+    cache.forecast_json = {
+        "current_weather": {"temperature": 12.0, "weathercode": 61},
+        "daily": {
+            "time": [yesterday, today, tomorrow],
+            "temperature_2m_max": [14.0, 16.0, 18.0],
+            "temperature_2m_min": [9.0, 8.0, 10.0],
+            "precipitation_sum": [0.0, 5.0, 1.5],
+            "precipitation_probability_max": [0, 70, 30],
+            "weathercode": [1, 61, 61],
+            "windspeed_10m_max": [10.0, 12.0, 8.0],
+        },
+        "hourly": {
+            "time": hourly_times,
+            "precipitation_probability": hourly_probs,
+        },
+    }
+
+    card = parse_weather_card_data(cache)
+    assert card is not None
+    assert card["precip_summary"] is not None
+    assert "2 PM" in card["precip_summary"]