fix(a11y): 44px tap targets + focus-visible on rec-feedback, chart range tabs, export switch (H1/H2/H6/H7)

WCAG 2.5.5 minimum hit-area is 44×44 CSS px and the Wave-C polish set
that as the project floor. Several v1.4.16 surfaces missed it:

- Recommendation thumbs (h-7 = 28 px) — `<RecommendationFeedback>` up
  + down both bumped to `min-h-11 min-w-11` with focus-visible ring.
- Recommendation chevron expand toggle (~24 px, no focus state) —
  `<RecommendationCard>` rec-expand-toggle bumped to `min-h-11
  min-w-11` with focus-visible ring.
- Chart range tabs (7d/30d/90d/All) — `min-h-9 px-2.5` ≈ 36×28 px on
  Pixel 5; bumped to `min-h-11 px-3` across HealthChart, MoodChart,
  MedicationComplianceChart, ComplianceCharts, ComplianceLineChart.
- Medication CSV "include intake history" raw `<input
  type="checkbox">` (16×16, system-blue on iOS Safari) — replaced
  with shadcn `<Switch>` inside a `min-h-11` label so the row is
  properly tappable and visually consistent with every other
  settings toggle.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/settings/export-section.tsx

@@ -33,6 +33,7 @@ import {
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
+import { Switch } from "@/components/ui/switch";
 import {
   DoctorReportDialog,
   type DoctorReportSubmitPayload,
@@ -453,13 +454,15 @@ function MedicationsCsvCard() {
         setSince={setSince}
         setUntil={setUntil}
       />
-      <label className="flex cursor-pointer items-center gap-2 text-xs">
-        <input
+      <label
+        htmlFor="export-medications-include-intake"
+        className="flex min-h-11 cursor-pointer items-center gap-3 text-xs"
+      >
+        <Switch
+          id="export-medications-include-intake"
           data-testid="export-medications-include-intake"
-          type="checkbox"
           checked={includeIntake}
-          onChange={(e) => setIncludeIntake(e.target.checked)}
-          className="border-border h-4 w-4 cursor-pointer rounded border"
+          onCheckedChange={setIncludeIntake}
         />
         <span className="text-muted-foreground">
           {t("settings.sections.export.cards.medicationsCsv.includeIntake")}