refactor(coach): unify launch glyph and propagate medication row shape

The per-target Coach button rode the MessageCircle glyph; hero strip, inline pill, layout FAB and daily-briefing CTA all paint Sparkles. The lone outlier swaps to Sparkles so the Coach-launch glyph reads as one icon vocabulary across the app. Separately, the insights/medikamente per-medication card painted its own header recipe (text-sm title with a Pill glyph and dose on line 2); routing the same row through MedicationCardHeader matches the canonical FB-G1 two-line shape used on the medications page. The streak chip rides the stateBadges slot.

src/components/targets/__tests__/target-coach-button.test.tsx

@@ -6,8 +6,8 @@ import { TargetCoachButton } from "../target-coach-button";
 
 /**
  * v1.4.25 W3e — gate test for the per-card Coach CTA. The button
- * MUST disappear when `aiEnabled` is false (Marc directive: no
- * broken-button state for users with no AI provider configured).
+ * MUST disappear when `aiEnabled` is false (the maintainer's rule:
+ * no broken-button state for users with no provider configured).
  */
 
 function render(props: Parameters<typeof TargetCoachButton>[0]) {
@@ -33,8 +33,12 @@ describe("<TargetCoachButton>", () => {
     // still surface "Ask Coach" / "Coach fragen".
     expect(html).toContain('aria-label="Ask Coach"');
     expect(html).toContain('title="Ask Coach"');
-    // No visible text label — only the chat-bubble glyph.
+    // No visible text label — only the Sparkles glyph.
     expect(html).not.toMatch(/>Ask Coach</);
+    // UI-H2 — the Coach-launch glyph is one Sparkles vocabulary
+    // across hero strip, inline pill, layout FAB and per-card icon.
+    expect(html).toMatch(/lucide-sparkles/i);
+    expect(html).not.toMatch(/lucide-message-circle/i);
   });
 
   it("lifts the tap target to the 44 px WCAG 2.5.5 floor", () => {

src/components/targets/target-coach-button.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { MessageCircle } from "lucide-react";
+import { Sparkles } from "lucide-react";
 
 import { Button } from "@/components/ui/button";
 import { cn } from "@/lib/utils";
@@ -24,8 +24,11 @@ import type { CoachScope, CoachScopeSource } from "@/lib/ai/coach/types";
  * a status pill, range bar, consistency strip, headline number, edit
  * cog and a source link, the labelled pill dominated the visual
  * hierarchy. Dropping the label retains the affordance via the
- * chat-bubble glyph + `aria-label` while shrinking the optical weight
- * to a per-card icon button.
+ * Sparkles glyph + `aria-label` while shrinking the optical weight
+ * to a per-card icon button. UI-H2 — the glyph is the same Sparkles
+ * the hero strip, the inline pill and the layout-level FAB use, so
+ * the per-card Coach launch reads on one icon vocabulary across the
+ * app.
  */
 export interface TargetCoachButtonProps {
   /**
@@ -85,7 +88,7 @@ export function TargetCoachButton({
       // Coach drawer cluster). Glyph stays `size-4`.
       className={cn("min-h-11 min-w-11", className)}
     >
-      <MessageCircle className="size-4" aria-hidden="true" />
+      <Sparkles className="size-4" aria-hidden="true" />
     </Button>
   );
 }