Move `<PasswordInput>` from `src/components/settings/password-input.tsx`
to `src/components/ui/password-input.tsx` so the auth surfaces 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`
