fix: read raw body as JSON when bricks_fetch omits Content-Type header

wwwroot/api/cockpit_chat.dspy

@@ -9,8 +9,19 @@ if action != 'send_message':
     msg = p.get('message_text', '') or ''
     if not msg:
         inner = p.get('params', None)
-        if hasattr(inner, 'get') and callable(inner.get):
+        if inner is not None and isinstance(inner, dict):
             msg = (inner.get('prompt') or inner.get('message_text') or '').strip()
+    # bricks_fetch sends JSON body without Content-Type — read raw
+    if not msg:
+        try:
+            raw_body = await request.read()
+            if raw_body:
+                import json
+                body = json.loads(raw_body.decode('utf-8'))
+                inner2 = body.get('params', {})
+                if isinstance(inner2, dict):
+                    msg = (inner2.get('prompt') or inner2.get('message_text') or '').strip()
+        except: pass
     if msg:
         action = 'send_message'
 dbname = get_module_dbname('pipeline-sdlc')