Fix: Enabled POST on MCP discovery to resolve platform 405 error

backend/main.py

@@ -77,11 +77,12 @@ async def process_synthesis(text: str, key: str):
     a = agent_action(record, t, k=key)
     return {"triage": t, "action": a}
 
-# ── MCP Standard (Optimized SSE Discovery) ──────────────────────────────────
+# ── MCP Standard (Optimized Discovery) ──────────────────────────────────
 
-@app.get("/mcp")
-async def mcp_discovery():
-    """Initial Discovery JSON"""
+@app.api_route("/mcp", methods=["GET", "POST", "OPTIONS"])
+async def mcp_discovery(req: Request):
+    """Initial Discovery (Supports both GET/POST for platform validation)"""
+    if req.method == "OPTIONS": return Response(status_code=204)
     return {
         "transport": "sse",
         "endpoint": "https://anil988-codeblue-context.hf.space/mcp/sse",