feat(insights): fold structured mood tags into the tag takeaways

The structured taxonomy tags carry a separate, richer signal than the
free-text tag list: a curated catalog pick with a label key and category,
attached to a mood entry through the tag-link join. The tag-mood takeaway
builder only ever read the flat tags, so the structured tags never reached
the ranked lift/drop pool despite both call sites already passing them.

Merge both axes into one ranked pool. A structured candidate emits its
catalog label key as tagKey, which the feed resolves to the active locale
the same way the weekday key already resolves; flat tags keep their
verbatim label. The lean status snapshot now loads the structured-tag
links too, so the takeaways the model sees match the ones on screen.

src/components/insights/mood/__tests__/mood-narrative-feed.test.tsx

@@ -34,6 +34,22 @@ describe("<MoodNarrativeFeed>", () => {
     expect(html).toContain('data-slot="mood-narrative-feed"');
   });
 
+  it("resolves a structured tag key into the sentence", () => {
+    const items: MoodNarrativeItem[] = [
+      {
+        kind: "tag-lift",
+        messageKey: "insights.mood.narrative.tagLift",
+        vars: { tagKey: "charts.weekdaysFull.fri", delta: "0.6" },
+      },
+    ];
+    // `charts.weekdaysFull.fri` stands in for a catalog label key — the
+    // renderer must resolve `tagKey` the same way it resolves `weekdayKey`.
+    const html = render(<MoodNarrativeFeed items={items} />);
+    expect(html).toContain("Friday");
+    expect(html).not.toContain("charts.weekdaysFull.fri");
+    expect(html).toContain("0.6");
+  });
+
   it("renders one row per takeaway in order", () => {
     const items: MoodNarrativeItem[] = [
       {

src/components/insights/mood/mood-narrative-feed.tsx

@@ -70,9 +70,12 @@ export function MoodNarrativeFeed({ items }: { items: MoodNarrativeItem[] }) {
       {items.map((item, index) => {
         const Icon = pickIcon(item);
         // The weekday key is itself an i18n key — resolve it before
-        // interpolating so the sentence reads in the active locale.
+        // interpolating so the sentence reads in the active locale. A
+        // structured tag→mood takeaway carries its catalog `tagKey`
+        // (an i18n key) the same way; flat tags supply `tag` verbatim.
         const vars: Record<string, string> = { ...item.vars };
         if (vars.weekdayKey) vars.weekday = t(vars.weekdayKey);
+        if (vars.tagKey) vars.tag = t(vars.tagKey);
         return (
           <li
             key={`${item.kind}-${index}`}