feat(my-deepagent): v0.4 — workflow generator UI + hot-reload + UX polish

브라우저에서 YAML 안 쓰고도 새 워크플로우 템플릿 만들기 + 즉시 등록.
+ /new.html / index.html / new-workflow.html / runs.html / conversation.html
의 nav·copy·empty-state 정비.

A. /new.html UX:
- 제목 "새 Run" → "워크플로우 실행 (고급)"
- 상단 info-box: "자유 대화는 여기가 아닙니다 → 메인 페이지"
- 모든 필드에 한 줄 hint
- Persona 오버라이드 <details> 접힘

B. Nav 재정렬 (5 페이지):
- "대화" nav-primary, 나머지 nav-secondary (작고 dim)

C. 메인 안내 + CSS:
- 메인 / 에 "👋 my-deepagent" info-box 추가
- .info-box / .nav-primary / .nav-secondary / .wf-* 신규 스타일

D. Workflow hot-reload:
- api/deps.py get_workflows 가 매 요청 mtime 튜플 검사 후 변경 시 reload
- lifespan 도 user dir 포함하도록 _load_workflows_combined

E. Workflow generator:
- POST /api/workflows: CreateWorkflowRequest → WorkflowTemplate validate →
  <data_dir>/workflows/<name>@<version>.yaml 저장.  중복 409, validation 422.
- static/new-workflow.html: 기본 정보 / Roles / Phases / YAML preview
- app.js bootstrapWorkflowGenerator: capability chip 토글, role select 동적,
  실시간 YAML preview, XSS 정책 유지

테스트 (test_workflow_generator.py, 7 신규):
- 페이지 200 + 마크업
- POST happy / 422 (empty roles) / 422 (unknown role) / 409 (dup)
- GET hot-reload after POST
- GET hot-reload after external file drop

게이트:
- ruff / format / mypy: PASS (142 source files)
- pytest -q --ignore=tests/integration/test_e2e_workflow.py
  --ignore=tests/integration/test_openrouter_smoke.py: 709 passed (+7 신규)
- 라이브 smoke: / / new.html / new-workflow.html 모두 200, screenshot OK

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

my-deepagent/src/my_deepagent/api/deps.py

@@ -3,6 +3,12 @@
 Pulls singletons stashed in `app.state` by the lifespan handler. Database is
 created ONCE per uvicorn process; per-request creation would defeat
 connection pooling.
+
+Workflows are different — they live in YAML files that the user can edit /
+create at runtime via the workflow generator UI.  `get_workflows` does a
+cheap mtime check on every call and reloads when any file in the seed or
+user workflow directory has changed.  No file watcher / inotify needed —
+the directories are tiny (≤ dozens of files) and stat is cheap.
 """
 
 from __future__ import annotations
@@ -14,6 +20,7 @@ from fastapi import Request
 
 from ..config import Config
 from ..persistence.db import Database
+from ..user_dirs import load_combined_workflows, user_workflows_dir
 
 if TYPE_CHECKING:
     from ..persona import Persona
@@ -36,9 +43,41 @@ def get_personas(request: Request) -> list[Persona]:
     return request.app.state.personas  # type: ignore[no-any-return]
 
 
+def _workflow_dir_signature(config: Config) -> tuple[tuple[str, float], ...]:
+    """Cheap mtime-tuple fingerprint of all YAMLs in seed + user dirs.
+
+    Two stat calls per file; the fingerprint changes when any file is
+    created / modified / deleted.  Used as the cache key for
+    :func:`get_workflows` so the API picks up new templates without a
+    process restart.
+    """
+    sig: list[tuple[str, float]] = []
+    for d in (_DOCS_SCHEMAS / "workflows", user_workflows_dir(config)):
+        if not d.is_dir():
+            continue
+        for p in sorted(d.glob("*.yaml")):
+            try:
+                sig.append((str(p), p.stat().st_mtime))
+            except OSError:
+                continue
+    return tuple(sig)
+
+
 def get_workflows(request: Request) -> list[tuple[Path, WorkflowTemplate]]:
-    """Return a list of (yaml_path, WorkflowTemplate) for all seed workflows."""
-    return request.app.state.workflows  # type: ignore[no-any-return]
+    """Return (path, template) list with mtime-based hot-reload.
+
+    On every request, computes the mtime fingerprint of the workflow dirs.
+    If it differs from the cached signature, calls
+    :func:`load_combined_workflows` again to pick up new / edited files.
+    """
+    app = request.app
+    config: Config = app.state.config
+    current_sig = _workflow_dir_signature(config)
+    cached_sig: tuple[tuple[str, float], ...] | None = getattr(app.state, "workflows_sig", None)
+    if cached_sig != current_sig:
+        app.state.workflows = load_combined_workflows(config, _DOCS_SCHEMAS / "workflows")
+        app.state.workflows_sig = current_sig
+    return app.state.workflows  # type: ignore[no-any-return]
 
 
 def seed_root() -> Path: