chore: 初始化工程骨架、许可与开发规范

建立仓库目录结构、许可证与贡献约定，确认前后端技术选型。

.claude/skills/write-e2e-test/SKILL.md

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+---
+name: write-e2e-test
+description: Write or change a ChatterMate Playwright end-to-end test (e2e/). Use when adding e2e coverage for a feature, fixing a failing e2e spec, or adding a page object, fixture or fake-LLM script.
+---
+
+# Writing a ChatterMate e2e test
+
+The suite lives in `e2e/`. Read `e2e/AUTHORING.md` first — it is the source of truth for
+layout and rules. The essentials:
+
+1. **Specs speak product language.** `specs/<feature>/<name>.spec.ts`, imports only from
+   `@e2e`, no selectors (`page.locator`) and no raw HTTP — lint fails otherwise. Title ends
+   with tags: `@<feature>`, plus `@smoke` only for the few journeys that must run on every PR.
+2. **Selectors go in `src/pages/` (a screen) or `src/components/` (shared UI).** Prefer
+   `getByRole`/`getByLabel`; if the element has no accessible name, add an `aria-label` to
+   the Vue component rather than reaching for CSS. CSS needs a one-line "why" comment.
+3. **Seed through `src/api/`, assert through the UI.** Need a new endpoint? Add a function to
+   the matching `src/api/*.ts` module.
+4. **Script the AI with `llm.script(agent, s => …)`** — `reply`, `handOver`, `createTicket`,
+   `callTool(...).thenReply(...)`. Replies are structured ChatResponse JSON; handover and
+   tickets are boolean fields, not tool calls.
+5. **Fixtures give each test its own `agent` + `widget`.** `test.use({ agentSettings: { transferToHuman: true } })`
+   for handover. `inbox` is Sam Agent's dashboard in a second browser. Never change org-wide
+   settings outside a `*.org.spec.ts`.
+6. **Prove it is stable** before finishing:
+   `cd e2e && npx playwright test specs/<feature> --repeat-each=10 && npm run lint && npm run typecheck`
+   (start the stack once with `./scripts/stack.sh up`; in a Claude worktree pass
+   `E2E_PYTHON` and `E2E_FRONTEND_NODE_MODULES` pointing at the main checkout, and run with
+   the sandbox disabled — Postgres, ports and the node_modules symlink need it).
+7. **Update `e2e/FEATURES.md`** — the row for the journey, with the spec path and ✅.
+
+Enterprise specs live in the private `enterprise_frontend` repo under `e2e/`, import only
+from `@e2e`, and must never be added to this public repo.