chore: drop planning tags from comments the review touched

src/components/insights/derived/__tests__/coach-read-strip-placeholder.test.tsx

@@ -40,7 +40,7 @@ describe("CoachReadStrip — placeholder while the read loads", () => {
     expect(markup).toContain('aria-busy="true"');
   });
 
-  function renderFailed(error: unknown) {
+  function renderFailed(error: Error) {
     // `retryOnMount: false` keeps the seeded failure from being reset to a
     // fresh load on render.
     const client = new QueryClient({

src/components/insights/derived/coach-read-strip.tsx

@@ -247,7 +247,7 @@ export function CoachReadStrip({
         <TileHeader
           icon={Sparkles}
           title={t("insights.coach.readStrip.label")}
-          // L3 — top-level section on every metric sub-page, sibling of the
+          // Top-level section on every metric sub-page, sibling of the
           // already-`h2` stat strip directly under the page `h1`.
           titleAs="h2"
         />