fix(serve): dedent root/SPA catch-all to module level — restore GREEN root route (regressed by /upgrades insertion). ADDITIVE, no change to /upgrades or v10.

serve.py

@@ -96,12 +96,22 @@ async def upgrades_index():
     return _UpgradesHTMLResponse(content=_UPGRADES_HTML)
 
 
-    @app.get("/{path:path}")
-    async def serve_spa(path: str):
-        file_path = STATIC_DIR / path
-        if file_path.exists() and file_path.is_file():
-            return FileResponse(file_path)
-        return FileResponse(STATIC_DIR / "index.html")
+# --- PRESERVED root + SPA catch-all (re-registered at module level).
+# NOTE: previously this catch-all was indented under upgrades_index() and never
+# registered, which 404'd the root memory-cortex landing. Dedented to module level
+# to restore the GREEN root route. ADDITIVE/no-content-change to /upgrades or v10.
+# Registered LAST so /api/amaru, /conduit, /upgrades all take precedence.
+@app.get("/{path:path}")
+async def serve_spa(path: str):
+    file_path = STATIC_DIR / path
+    if file_path.exists() and file_path.is_file():
+        return FileResponse(file_path)
+    return FileResponse(STATIC_DIR / "index.html")
+
+
+@app.get("/")
+async def serve_root():
+    return FileResponse(STATIC_DIR / "index.html")
 
 
 if __name__ == "__main__":