feat(web): wire startup Workspace selection and sync docs

- Mount WorkspacesService.startInitialSelection in the runtime apply (the
  one-shot baseline follower shipped in 98633b5aa without a caller): a
  restored current session wins, an explicit clear stays cleared, a failed
  connect retries on the next baseline projection.
- Cover the policy in client-apply and the assembled workspace-flow
  snapshot; startup now lands in the recent Workspace's blank session, so
  the draft-carry scenario starts from the hero directly.
- Bring docs along: startup-selection paragraphs in the session-scope RFC
  note (both languages), bilingual README pairs for the four new client
  packages, doc-graph regeneration with client-declared events exempt from
  the dispatcher requirement (client dispatch sites are structurally
  invisible to the host-side ts.Program), and pairing re-records.

packages/client/runtime/src/client/index.ts

@@ -115,6 +115,10 @@ export function apply(ctx: Context): void {
   const connection = ctx.get('connection') as ConnectionHandle
   const sessions = new SessionsService(ctx, connection.api)
   const workspaces = new WorkspacesService(ctx, connection.api, sessions)
+  ctx.effect(
+    () => workspaces.startInitialSelection(),
+    'runtime: initial Workspace selection',
+  )
   const loop = connection.start({
     onMuxEnvelope: (envelope) => { sessions.handleMuxEnvelope(envelope) },
     onHostEnvelope: (envelope) => {