Merge branch 'master' into worktree/dsh-arg-parser

Integrate the Commander adapter with master's `dsh web --workspace-root`
(workspace-aware session flow).

- args.ts: add `--workspace-root <path>` to the web subcommand; WebInvocation
  carries workspaceRoot.
- web.ts: keep the adapter-parsed signature, take (host, port, dev,
  workspaceRoot) and pass workspaceRoot through to AppCLIEntry (drop master's
  re-added parseArgs and CLI host/port validation — the schema owns those).
- bin.ts forwards invocation.workspaceRoot; args.spec + the Agent Note pair note
  the flag.

apps/cli/tests/args.spec.ts

@@ -33,8 +33,8 @@ describe('parseDshArgs', () => {
     expect(parse(['web'])).toEqual({ mode: 'web', dev: false })
     // Host/port are unvalidated pass-throughs (the webserver schema gates them
     // at boot); the adapter only coerces the port string to a number.
-    expect(parse(['web', '--host', '0.0.0.0', '--port', '8080', '--dev']))
-      .toEqual({ mode: 'web', host: '0.0.0.0', port: 8080, dev: true })
+    expect(parse(['web', '--host', '0.0.0.0', '--port', '8080', '--dev', '--workspace-root', '/w']))
+      .toEqual({ mode: 'web', host: '0.0.0.0', port: 8080, dev: true, workspaceRoot: '/w' })
   })
 
   it('exits nonzero instead of silently starting fresh or dropping inputs', () => {