feat(desktop): create threads from project composer

design/qwen-code-electron-desktop-implementation-plan.md

@@ -20,6 +20,95 @@ execution order, verification, decisions, and remaining work.
 - Every completed slice must leave targeted verification and a conventional
   commit.
 
-## Task Breakdown
+## Codex Alignment Progress
 
-### Slice 1: Composer-First Thread Creation Alignment
+### Active Slice: Composer-First Thread Creation Alignment
+
+Status: completed in iteration 2.
+
+Goal: let a user open a project and type immediately, without first learning
+that they must create or select a session.
+
+User-visible value: the default path becomes
+`Open project -> type request -> agent works`; the composer explains the active
+project context and creates the backing desktop session on first send.
+
+Expected files:
+
+- `packages/desktop/src/renderer/App.tsx`
+- `packages/desktop/src/renderer/components/layout/WorkspacePage.tsx`
+- `packages/desktop/src/renderer/components/layout/ChatThread.tsx`
+- `packages/desktop/src/renderer/components/layout/WorkspacePage.test.tsx`
+- `packages/desktop/src/renderer/styles.css`
+- `packages/desktop/scripts/e2e-cdp-smoke.mjs`
+- `.qwen/e2e-tests/electron-desktop/composer-first-thread-creation.md`
+
+Acceptance criteria:
+
+- Composer is enabled whenever a project is active, even when no session is
+  selected.
+- With no project, composer remains disabled and gives a clear disabled reason.
+- First send from a project with no selected session creates a desktop session,
+  sends the message, clears the composer, and publishes the created thread.
+- Existing explicit `New Thread` behavior continues to work.
+- The composer visibly carries compact project/branch, permission, and model
+  context so it reads as the task control center rather than a plain textarea.
+- `Enter` send and `Shift+Enter` newline behavior are preserved.
+
+Verification:
+
+- Unit/component test command:
+  `cd packages/desktop && SHELL=/bin/bash npx vitest run src/renderer/components/layout/WorkspacePage.test.tsx`
+- Build/typecheck/lint commands:
+  `cd packages/desktop && npm run typecheck && npm run lint && npm run build`
+- Real Electron harness:
+  `cd packages/desktop && npm run e2e:cdp`
+- Harness path: `packages/desktop/scripts/e2e-cdp-smoke.mjs`
+- E2E scenario steps: launch real Electron with isolated HOME/runtime/user-data
+  and fake ACP, open the fake Git project, type a prompt into the project-scoped
+  composer without clicking `New Thread`, send it, approve the fake command
+  request, and assert the created thread/message/response appear.
+- E2E assertions: first viewport landmarks stay present; composer is enabled
+  after project open; no `New Thread` click is required; fake ACP response is
+  received; console errors and failed local requests are absent.
+- Diagnostic artifacts: CDP screenshots, layout JSON, DOM text, Electron log,
+  summary JSON under `.qwen/e2e-tests/electron-desktop/artifacts/`.
+- Required skills applied: `frontend-design` for composer layout/control
+  hierarchy with the prototype as the strict visual contract; `electron-desktop-dev`
+  for renderer changes and real Electron CDP verification.
+
+Notes and decisions:
+
+- The prototype wins over earlier tab/dashboard guidance. This slice keeps the
+  conversation as the default surface and upgrades the bottom composer without
+  opening review, terminal, or settings by default.
+- Model and permission controls are compact context controls in the composer.
+  They use existing session runtime state when available and safe fallback
+  labels before a session exists; changing values still requires a live session
+  until the server API supports project-level defaults.
+- Implementation changed first-send behavior so any active project with no
+  active session creates a session on submit. The explicit `New Thread` button
+  still creates a draft thread for users who want to start intentionally from
+  the sidebar.
+- CDP smoke now sends the first prompt immediately after opening the fake
+  project and before clicking `Changes`, proving the `New Thread` click is no
+  longer required.
+
+Verification results:
+
+- `cd packages/desktop && SHELL=/bin/bash npx vitest run src/renderer/components/layout/WorkspacePage.test.tsx`
+  passed with 4 tests.
+- `cd packages/desktop && npm run typecheck` passed.
+- `cd packages/desktop && npm run lint` passed.
+- `cd packages/desktop && npm run build` passed.
+- `cd packages/desktop && npm run e2e:cdp` passed.
+- Passing artifacts:
+  `.qwen/e2e-tests/electron-desktop/artifacts/2026-04-25T16-41-09-752Z/`.
+
+Next work:
+
+- Continue prototype fidelity by reducing topbar tab weight and moving review
+  access toward compact icon/drawer behavior.
+- Follow-up model configuration work should make composer model/permission
+  controls editable before a session exists by persisting project-level
+  defaults, rather than only reflecting live session runtime state.