feat(weather): add rule-based weather impact summaries

src/accessiweather/display/presentation/current_conditions.py

@@ -5,6 +5,7 @@
 import logging
 from collections.abc import Iterable
 
+from ...impact_summary import build_impact_summary
 from ...models import (
     AppSettings,
     CurrentConditions,
@@ -565,6 +566,15 @@ def build_current_conditions(
     if anomaly_callout is not None:
         metrics.append(Metric("Historical context", anomaly_callout.temp_anomaly_description))
 
+    # Build impact summary and append as metrics
+    impact = build_impact_summary(current, environmental)
+    if impact.outdoor is not None:
+        metrics.append(Metric("Impact: Outdoor", impact.outdoor))
+    if impact.driving is not None:
+        metrics.append(Metric("Impact: Driving", impact.driving))
+    if impact.allergy is not None:
+        metrics.append(Metric("Impact: Allergy", impact.allergy))
+
     # Build fallback text
     # Use metric.label for all metrics — after priority reordering, metrics[0]
     # may no longer be the Temperature metric (e.g. Visibility moves first during fog alerts)
@@ -588,6 +598,7 @@ def build_current_conditions(
         metrics=metrics,
         fallback_text=fallback_text,
         trends=trend_lines,
+        impact_summary=impact,
     )
 
 

src/accessiweather/display/presentation/forecast.py

@@ -6,6 +6,7 @@
 from datetime import UTC, date, datetime, tzinfo
 
 from ...forecast_confidence import ForecastConfidence
+from ...impact_summary import ImpactSummary, build_forecast_impact_summary
 from ...models import AppSettings, Forecast, ForecastPeriod, HourlyForecast, Location
 from ...utils import TemperatureUnit, calculate_dewpoint
 from ...utils.unit_utils import format_precipitation, format_wind_speed
@@ -300,6 +301,12 @@ def build_forecast(
         fallback_sections.append(hourly_section_text)
     fallback_text = "\n\n".join(section for section in fallback_sections if section).rstrip()
 
+    # Derive an impact summary from the first available forecast period
+    first_period = selected_periods[0] if selected_periods else None
+    forecast_impact: ImpactSummary | None = (
+        build_forecast_impact_summary(first_period) if first_period is not None else None
+    )
+
     return ForecastPresentation(
         title=title,
         periods=periods,
@@ -311,6 +318,7 @@ def build_forecast(
         hourly_section_text=hourly_section_text,
         confidence_label=confidence_label,
         summary=summary_line,
+        impact_summary=forecast_impact,
     )
 
 

src/accessiweather/display/weather_presenter.py

@@ -16,6 +16,7 @@
     from accessiweather.alert_lifecycle import AlertLifecycleDiff
 
     from ..forecast_confidence import ForecastConfidence
+    from ..impact_summary import ImpactSummary
 
 from ..models import (
     AppSettings,
@@ -86,6 +87,7 @@ class CurrentConditionsPresentation:
     metrics: list[Metric] = field(default_factory=list)
     fallback_text: str = ""
     trends: list[str] = field(default_factory=list)
+    impact_summary: ImpactSummary | None = None
 
     @property
     def trend_summary(self) -> list[str]:  # pragma: no cover - backward compatibility
@@ -107,6 +109,7 @@ class ForecastPresentation:
     hourly_section_text: str = ""
     confidence_label: str | None = None
     summary: str | None = None
+    impact_summary: ImpactSummary | None = None
 
 
 @dataclass(slots=True)