refactor(web): reorganize phases + fix Open-your-node URL

Move sections to where they read better:
- Phase 1 (Team registration): drop the "Your Agent" block.
- Phase 2 (Meet your agent): host the "Your Agent" section (say-hi / Telegram /
  voice) AND the agent chat under it; remove "Pick your domain".
- Module 1 (Domain & events): "Pick your domain" moves here (no more read-only
  carry) alongside the ADD Layer 1 card.
- Module 2 (Skills & policies): the chat is gone; the L2/L3 ADD cards show
  directly (still auto-prefilled if the three prompts ran in Meet your agent).

Also: OpenYourNode opens the browser-reachable board URL. In self-host/USB mode
the stored url is container-facing (host.docker.internal) which the browser
can't resolve — derive the current host on :8080 instead. Tests updated.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/pages/Module1.test.tsx

@@ -35,13 +35,10 @@ describe('Module1', () => {
     expect(screen.getByRole('heading', { name: /domain.*events/i })).toBeInTheDocument()
   })
 
-  it('shows the domain carried over from the earlier screen (read-only)', () => {
-    useSession.getState().setDomain('air quality')
+  it('lets you pick the domain here (no read-only carry)', () => {
     renderPage()
-    const carried = screen.getByTestId('domain-carried')
-    expect(carried).toHaveTextContent('air quality')
-    // no editable domain input here anymore
-    expect(screen.queryByLabelText(/your domain/i)).toBeNull()
+    expect(screen.queryByTestId('domain-carried')).toBeNull()
+    expect(screen.getByPlaceholderText(/image measurement|structural stress|air quality/i)).toBeInTheDocument()
   })
 
   it('focuses on Layer 1 — no live board feed or actor map cards', () => {
@@ -50,12 +47,13 @@ describe('Module1', () => {
     expect(screen.queryByTestId('actor-map')).toBeNull()
   })
 
-  it('gates Proceed until the board is online and L1 is filled', async () => {
+  it('gates Proceed until the board is online, a domain is named, and L1 is filled', async () => {
     const user = userEvent.setup()
     renderPage()
     const proceed = screen.getByRole('button', { name: /proceed/i })
     expect(proceed).toBeDisabled()
 
+    act(() => useSession.getState().setDomain('resonance'))
     await user.type(screen.getByLabelText(/layer 1/i), 'structural resonance')
     expect(proceed).toBeDisabled() // board not online yet