feat(ui): lift the password toggle into a shared primitive

Move `<PasswordInput>` from `src/components/settings/password-input.tsx`
to `src/components/ui/password-input.tsx` so the auth surfaces (login
and register) and every settings card that masks a secret consume one
primitive. The two surfaces previously diverged on toggle markup and
aria-label wiring; the new home in `ui/` keeps them in lock-step.

While the primitive moves, lift the icon-only show/hide toggle to a
44 px hit area per WCAG 2.5.5 — `inline-flex h-11 w-11` wrapper with
the eye icon centred inside. The input itself gets `pr-12` so user
input never collides with the toggle glyph.

Consumer imports updated in:
- `src/components/settings/account-section.tsx`
- `src/components/settings/ai-section.tsx`
- `src/components/settings/integrations-section.tsx`
- `src/components/settings/ntfy-card.tsx`
- `src/components/settings/telegram-card.tsx`
- `src/components/admin/_shared.tsx`

The `<DialogContent>` close-X tap-target lift to `min-h-9 min-w-9`
landed in the parallel `ResponsiveSheet` commit because both buckets
share the same `dialog.tsx` file. See Decision I — 36 px is the
intentional exception for fixed icon-only close affordances.

src/app/measurements/page.tsx

@@ -5,13 +5,7 @@ import { useAuth } from "@/hooks/use-auth";
 import { MeasurementForm } from "@/components/measurements/measurement-form";
 import { MeasurementList } from "@/components/measurements/measurement-list";
 import { Button } from "@/components/ui/button";
-import {
-  Dialog,
-  DialogContent,
-  DialogHeader,
-  DialogTitle,
-  DialogTrigger,
-} from "@/components/ui/dialog";
+import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
 import { Plus, Loader2 } from "lucide-react";
 import { useRouter } from "next/navigation";
 import { useEffect } from "react";
@@ -48,25 +42,23 @@ export default function MeasurementsPage() {
             {t("measurements.subtitle")}
           </p>
         </div>
-        <Dialog open={dialogOpen} onOpenChange={setDialogOpen}>
-          <DialogTrigger asChild>
-            <Button>
-              <Plus className="mr-2 h-4 w-4" />
-              {t("measurements.addMeasurement")}
-            </Button>
-          </DialogTrigger>
-          <DialogContent>
-            <DialogHeader>
-              <DialogTitle>{t("measurements.addMeasurement")}</DialogTitle>
-            </DialogHeader>
-            <MeasurementForm
-              onSuccess={() => setDialogOpen(false)}
-              onCancel={() => setDialogOpen(false)}
-            />
-          </DialogContent>
-        </Dialog>
+        <Button onClick={() => setDialogOpen(true)}>
+          <Plus className="mr-2 h-4 w-4" />
+          {t("measurements.addMeasurement")}
+        </Button>
       </div>
 
+      <ResponsiveSheet
+        open={dialogOpen}
+        onOpenChange={setDialogOpen}
+        title={t("measurements.addMeasurement")}
+      >
+        <MeasurementForm
+          onSuccess={() => setDialogOpen(false)}
+          onCancel={() => setDialogOpen(false)}
+        />
+      </ResponsiveSheet>
+
       <MeasurementList onAddFirst={() => setDialogOpen(true)} />
     </div>
   );

src/app/mood/page.tsx

@@ -5,13 +5,7 @@ import { useAuth } from "@/hooks/use-auth";
 import { MoodForm } from "@/components/mood/mood-form";
 import { MoodList } from "@/components/mood/mood-list";
 import { Button } from "@/components/ui/button";
-import {
-  Dialog,
-  DialogContent,
-  DialogHeader,
-  DialogTitle,
-  DialogTrigger,
-} from "@/components/ui/dialog";
+import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
 import { Plus, Loader2 } from "lucide-react";
 import { useRouter } from "next/navigation";
 import { useEffect } from "react";
@@ -48,25 +42,23 @@ export default function MoodPage() {
             {t("mood.subtitle")}
           </p>
         </div>
-        <Dialog open={dialogOpen} onOpenChange={setDialogOpen}>
-          <DialogTrigger asChild>
-            <Button>
-              <Plus className="mr-2 h-4 w-4" />
-              {t("mood.addEntry")}
-            </Button>
-          </DialogTrigger>
-          <DialogContent>
-            <DialogHeader>
-              <DialogTitle>{t("mood.addEntry")}</DialogTitle>
-            </DialogHeader>
-            <MoodForm
-              onSuccess={() => setDialogOpen(false)}
-              onCancel={() => setDialogOpen(false)}
-            />
-          </DialogContent>
-        </Dialog>
+        <Button onClick={() => setDialogOpen(true)}>
+          <Plus className="mr-2 h-4 w-4" />
+          {t("mood.addEntry")}
+        </Button>
       </div>
 
+      <ResponsiveSheet
+        open={dialogOpen}
+        onOpenChange={setDialogOpen}
+        title={t("mood.addEntry")}
+      >
+        <MoodForm
+          onSuccess={() => setDialogOpen(false)}
+          onCancel={() => setDialogOpen(false)}
+        />
+      </ResponsiveSheet>
+
       <MoodList onAddFirst={() => setDialogOpen(true)} />
     </div>
   );

src/app/page.tsx

@@ -26,12 +26,7 @@ import type { DataSummary as DataSummaryType } from "@/lib/analytics/trends";
 import dynamic from "next/dynamic";
 import { Button } from "@/components/ui/button";
 import { EmptyState } from "@/components/ui/empty-state";
-import {
-  Dialog,
-  DialogContent,
-  DialogHeader,
-  DialogTitle,
-} from "@/components/ui/dialog";
+import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
 import {
   DropdownMenu,
   DropdownMenuContent,
@@ -523,35 +518,27 @@ export default function DashboardPage() {
        * line is free for established users. */}
       <TourLauncher ready={data !== undefined} />
 
-      {/* Quick Entry Dialogs */}
-      <Dialog
+      {/* Quick Entry Sheets — bottom-sheet on `<md`, centred Dialog on `md+`. */}
+      <ResponsiveSheet
         open={quickEntryDialog === "measurement"}
         onOpenChange={(open) => !open && setQuickEntryDialog(null)}
+        title={t("measurements.addMeasurement")}
       >
-        <DialogContent>
-          <DialogHeader>
-            <DialogTitle>{t("measurements.addMeasurement")}</DialogTitle>
-          </DialogHeader>
-          <MeasurementForm
-            onSuccess={() => setQuickEntryDialog(null)}
-            onCancel={() => setQuickEntryDialog(null)}
-          />
-        </DialogContent>
-      </Dialog>
-      <Dialog
+        <MeasurementForm
+          onSuccess={() => setQuickEntryDialog(null)}
+          onCancel={() => setQuickEntryDialog(null)}
+        />
+      </ResponsiveSheet>
+      <ResponsiveSheet
         open={quickEntryDialog === "mood"}
         onOpenChange={(open) => !open && setQuickEntryDialog(null)}
+        title={t("mood.addEntry")}
       >
-        <DialogContent>
-          <DialogHeader>
-            <DialogTitle>{t("mood.addEntry")}</DialogTitle>
-          </DialogHeader>
-          <MoodForm
-            onSuccess={() => setQuickEntryDialog(null)}
-            onCancel={() => setQuickEntryDialog(null)}
-          />
-        </DialogContent>
-      </Dialog>
+        <MoodForm
+          onSuccess={() => setQuickEntryDialog(null)}
+          onCancel={() => setQuickEntryDialog(null)}
+        />
+      </ResponsiveSheet>
 
       {(() => {
         type TrendEntry = { id: string; order: number; node: React.ReactNode };