Restore home page with README display

Instead of redirecting to /runs, show the home page with stats and README.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/routers/home.py

@@ -2,6 +2,9 @@
 Home and root routes for L1 server.
 """
 
+from pathlib import Path
+
+import markdown
 from fastapi import APIRouter, Request, Depends
 from fastapi.responses import HTMLResponse, RedirectResponse
 
@@ -16,16 +19,26 @@ router = APIRouter()
 @router.get("/")
 async def home(request: Request):
     """
-    Home page - redirect to runs if authenticated, show landing otherwise.
+    Home page - show README and stats.
     """
     user = await get_current_user(request)
 
-    if user:
-        return RedirectResponse(url="/runs", status_code=302)
+    # Load README
+    readme_html = ""
+    try:
+        readme_path = Path(__file__).parent.parent.parent / "README.md"
+        if readme_path.exists():
+            readme_html = markdown.markdown(readme_path.read_text())
+    except Exception:
+        pass
 
-    # For now, redirect to login at L2
-    # TODO: Show a landing page with login link
-    return RedirectResponse(url="/runs", status_code=302)
+    templates = get_templates(request)
+    return render(templates, "home.html", request,
+        user=user,
+        readme_html=readme_html,
+        stats={},
+        active_tab="home",
+    )
 
 
 @router.get("/login")