fix(air-quality): show the Weather card, add voice support and bound the feed

The card never appeared: the Weather panel only passed five fixed ids and only
rendered lists and categorical legends for cyclones. Air quality now reaches
the panel, the legend style comes from the layer's descriptor, and any layer
with list items gets its list. Adds the voice manifest entry main now requires,
reads ECCC through the shared capped JSON reader with a 15 s deadline and the
row limit enforced, reports stale when every reading was too old, adds source
tests, links the ECCC licence and moves the changelog entry into Unreleased.

src/voice/actionSchemas.test.mjs

@@ -37,7 +37,8 @@ test('the complete Realtime tool payload pins the manifest-generated layer relea
     // omit top-level anyOf (OpenAI rejects it). Contacts list routing preserves
     // requested radius and center authority in descriptions only.
     // Street Level and GNSS extend the manifest; tracked and analyst aircraft describe broadcasts.
-    '9398815a573ab29ecc3ce527f6e1a2ad883804e7696e0444aebb11f973700d4b',
+    // Air quality (ECCC AQHI) extends the manifest.
+    '775ba323384b4c1b62fb8415bac52aecc3fc668e20bedcfa57e426dcd1da3969',
   );
 });
 

src/voice/layerManifest.js

@@ -250,6 +250,24 @@ const layers = [
     context: false,
     noQuery: 'map overlay; no countable records',
   },
+  {
+    id: 'air-quality',
+    aliases: ['air quality', 'aqhi', 'smog', 'air pollution'],
+    context: false,
+    query: {
+      fields: {
+        value: ['n', 'AQHI'],
+        band: ['t'],
+        scale: ['t'],
+        provider: ['t'],
+        name: ['t'],
+        zone: ['t'],
+        risk: ['t'],
+        observedMs: ['ms'],
+      },
+      timeField: 'observedMs',
+    },
+  },
   {
     id: 'traffic',
     aliases: ['street traffic', 'road traffic', 'congestion'],