feat(projets): routes /api/projects + files et git re-racinés

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/main.py

@@ -15,7 +15,10 @@ from fastapi.staticfiles import StaticFiles
 from . import agent_config, coder, db, rag
 from .config import settings
 from .ollama_client import ollama
-from .routes import benchmark, chat, config, files, git, mcp, models, sessions, shell, system
+from .routes import (
+    benchmark, chat, config, files, git, mcp, models, projects, sessions,
+    shell, system,
+)
 
 
 async def _warm_default_model() -> None:
@@ -78,6 +81,7 @@ app.include_router(system.router)
 app.include_router(benchmark.router)
 app.include_router(git.router)
 app.include_router(mcp.router)
+app.include_router(projects.router)
 
 
 @app.get("/api/health")