feat: remove OpenCode assistant mode

backend/db/seed_assistants.sql

@@ -22,10 +22,6 @@ INSERT INTO assistants (
   ('asst_004', 'FastGPT 售后助手', 'fastgpt', 'pipeline', '', TRUE,
    FALSE, NULL,
    NULL, '', 'https://api.fastgpt.in/api/v1/chat/completions', 'fastgpt-demo-key', 'app-fastgpt-001', '{}',
-   '{"execution_mode":"sequential","opening_mode":"interruptible","entry_mode":"wait_user","actions":[],"opening_message":null}'),
-  ('asst_005', 'OpenCode 代码助手', 'opencode', 'pipeline', '', TRUE,
-   FALSE, NULL,
-   NULL, '你是一个代码助手的语音界面，用简洁口语回答工程问题。', 'http://localhost:4096', 'opencode-demo-key', '', '{}',
    '{"execution_mode":"sequential","opening_mode":"interruptible","entry_mode":"wait_user","actions":[],"opening_message":null}')
 ON CONFLICT (id) DO NOTHING;
 
@@ -40,10 +36,7 @@ VALUES
   ('asst_003', 'Agent', 'model_014', '{}'),
   ('asst_004', 'ASR', 'model_002', '{}'),
   ('asst_004', 'TTS', 'model_004', '{}'),
-  ('asst_004', 'Agent', 'model_015', '{}'),
-  ('asst_005', 'ASR', 'model_002', '{}'),
-  ('asst_005', 'TTS', 'model_004', '{}'),
-  ('asst_005', 'Agent', 'model_016', '{}')
+  ('asst_004', 'Agent', 'model_015', '{}')
 ON CONFLICT (assistant_id, capability) DO UPDATE SET
   model_resource_id = EXCLUDED.model_resource_id,
   updated_at = now();