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/charts/compliance-charts.tsx

@@ -103,7 +103,7 @@ export function ComplianceCharts({ medications }: ComplianceChartsProps) {
                   type="button"
                   variant={rangePoints === 30 ? "default" : "ghost"}
                   size="sm"
-                  className="min-h-9 px-2.5 text-xs"
+                  className="min-h-11 px-3 text-xs"
                   onClick={() => setRangePoints(30)}
                   title={t("charts.points30Title")}
                 >
@@ -113,7 +113,7 @@ export function ComplianceCharts({ medications }: ComplianceChartsProps) {
                   type="button"
                   variant={rangePoints === 90 ? "default" : "ghost"}
                   size="sm"
-                  className="min-h-9 px-2.5 text-xs"
+                  className="min-h-11 px-3 text-xs"
                   onClick={() => setRangePoints(90)}
                   title={t("charts.points90Title")}
                 >
@@ -123,7 +123,7 @@ export function ComplianceCharts({ medications }: ComplianceChartsProps) {
                   type="button"
                   variant={rangePoints === 0 ? "default" : "ghost"}
                   size="sm"
-                  className="min-h-9 px-2.5 text-xs"
+                  className="min-h-11 px-3 text-xs"
                   onClick={() => setRangePoints(0)}
                   title={t("charts.pointsAllTitle")}
                 >

src/components/charts/compliance-line-chart.tsx

@@ -73,7 +73,7 @@ export function ComplianceLineChart({
               key={r.label}
               variant={activeRangePoints === r.points ? "default" : "ghost"}
               size="sm"
-              className="min-h-9 px-2.5 text-xs"
+              className="min-h-11 px-3 text-xs"
               onClick={() => setActiveRangePoints(r.points)}
               title={r.title}
             >

src/components/charts/health-chart.tsx

@@ -879,7 +879,7 @@ export function HealthChart({
                 key={r.labelKey}
                 variant={rangePoints === r.points ? "default" : "ghost"}
                 size="sm"
-                className="min-h-9 px-2.5 text-xs"
+                className="min-h-11 px-3 text-xs"
                 onClick={() => setRangePoints(r.points)}
                 title={t(r.titleKey)}
                 data-slot="chart-range-tab"

src/components/charts/medication-compliance-chart.tsx

@@ -257,7 +257,7 @@ export function MedicationComplianceChart({
               key={r}
               variant={days === r ? "default" : "ghost"}
               size="sm"
-              className="min-h-9 px-2.5 text-xs"
+              className="min-h-11 px-3 text-xs"
               onClick={() => setDays(r)}
             >
               {r}T

src/components/charts/mood-chart.tsx

@@ -550,7 +550,7 @@ export function MoodChart({
                   key={r.labelKey}
                   variant={rangePoints === r.points ? "default" : "ghost"}
                   size="sm"
-                  className="min-h-9 px-2.5 text-xs"
+                  className="min-h-11 px-3 text-xs"
                   onClick={() => setRangePoints(r.points)}
                   title={t(r.titleKey)}
                   data-slot="chart-range-tab"