Cleanup: pf2e subclasses + all native dialogs → themed Modals

- pf2e classes now show the defining 1st-level choice (instinct / doctrine /
  bloodline / mystery / racket / implement / thesis / …) in the wizard's
  subclass picker, like 5e. Curated PF2E_SUBCLASSES in pf2e/progression.ts,
  merged into the class during the wizard's pf2e enrich step.
- replaced every remaining native dialog with a themed Modal:
  - PlayerView session-password prompt → password Modal
  - Settings cloud-conflict confirm → "Use cloud / Keep this device" Modal
  - SessionControl host-password prompt → host Modal (optional password)
  - MapEditor text-label prompt → label Modal (captures the click point)
  No window.confirm / window.prompt / window.alert remain in the app.

Realtime e2e updated for the host Modal (Host → Start hosting).
Gate: 293 unit + 35 e2e + 2 realtime; tsc + app/server build clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

e2e-realtime/seats.spec.ts

@@ -20,6 +20,7 @@ test('a player claims a seat and manages their character; edits round-trip to th
   await gm.getByRole('button', { name: 'Load sample campaign' }).click();
   await expect(gm.getByRole('heading', { name: 'Sample: Lost Mine' })).toBeVisible();
   await gm.getByRole('button', { name: 'Host' }).click();
+  await gm.getByRole('button', { name: 'Start hosting' }).click();
   const code = (await gm.getByTestId('join-code').textContent())?.replace(/[^A-Z0-9]/g, '') ?? '';
   expect(code).toHaveLength(6);