Refactor LLM verification and update dependencies

- Removed OpenAI and related dependencies from package.json and package-lock.json.
- Simplified LLM verification logic to focus on OpenCode server.
- Updated tests to reflect changes in LLM provider handling.
- Added CI and CD workflows for automated processes in Gitea.

app/llm.js

@@ -1,52 +1,13 @@
 import axios from 'axios';
 import { getLLMConfig, getOpenCodeHttpsAgent } from './config.js';
-import { recordUsage, recordRateLimit } from './usage.js';
+import { recordUsage } from './usage.js';
 import { line, error } from './log.js';
 
-function isOpenAIGpt55(provider, model) {
-  return provider === 'openai' && /^gpt-5\.5(?:-|$)/i.test(model || '');
-}
-
-function chatEndpoint(baseURL, provider, model) {
-  const base = baseURL.replace(/\/$/, '');
-  return isOpenAIGpt55(provider, model) ? `${base}/responses` : `${base}/chat/completions`;
-}
-
-function chatPayload(provider, model, systemPrompt, userContent) {
-  if (isOpenAIGpt55(provider, model)) {
-    return { model, instructions: systemPrompt, input: userContent, temperature: 0.2 };
-  }
-  return { model, messages: [{ role: 'system', content: systemPrompt }, { role: 'user', content: userContent }], temperature: 0.2 };
-}
-
-function extractContent(provider, model, data) {
-  if (!isOpenAIGpt55(provider, model)) return data.choices[0].message.content;
-  if (typeof data.output_text === 'string') return data.output_text;
-  const parts = data.output?.flatMap(item => item.content || []) || [];
-  const text = parts
-    .map(part => {
-      if (typeof part.text === 'string') return part.text;
-      if (typeof part.content === 'string') return part.content;
-      return '';
-    })
-    .filter(Boolean)
-    .join('');
-  if (text) return text;
-  return data.choices?.[0]?.message?.content || '';
-}
-
 function opencodeModelConfig(model) {
   const [providerID, modelID] = model.includes('/') ? model.split('/', 2) : [process.env.OPENCODE_PROVIDER || 'google', model];
   return { providerID, modelID };
 }
 
-function applyOpenCodeAuth(headers) {
-  const password = process.env.OPENCODE_SERVER_PASSWORD;
-  if (!password) return;
-  const username = process.env.OPENCODE_SERVER_USERNAME || 'opencode';
-  headers['Authorization'] = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
-}
-
 function opencodeAxiosOptions(headers) {
   return {
     headers,
@@ -86,37 +47,21 @@ async function chatOpenCode(baseURL, model, systemPrompt, userContent, headers)
 }
 
 export async function chat(systemPrompt, userContent) {
-  const { provider, apiKeys, baseURL, model } = getLLMConfig();
-  if (!provider) throw new Error('未設定任何 LLM API Key');
+  const { provider, baseURL, model } = getLLMConfig();
+  if (!provider) throw new Error('未設定 OpenCode server，請設定 OPENCODE_BASE_URL');
 
   line(`[LLM] provider=${provider} model=${model}`);
 
   const headers = { 'Content-Type': 'application/json' };
-  if (provider === 'claude') headers['anthropic-version'] = '2023-06-01';
 
-  const shuffled = [...apiKeys].sort(() => Math.random() - 0.5);
-  for (let i = 0; i < shuffled.length; i++) {
-    if (provider !== 'ollama' && provider !== 'opencode') headers['Authorization'] = `Bearer ${shuffled[i]}`;
-    try {
-      if (provider === 'opencode') {
-        applyOpenCodeAuth(headers);
-        const { content, data } = await chatOpenCode(baseURL, model, systemPrompt, userContent, headers);
-        recordUsage(data);
-        return content;
-      }
-      const resp = await axios.post(
-        chatEndpoint(baseURL, provider, model),
-        chatPayload(provider, model, systemPrompt, userContent),
-        { headers }
-      );
-      recordUsage(resp.data);
-      recordRateLimit(resp.headers);
-      return extractContent(provider, model, resp.data);
-    } catch (e) {
-      line(`[LLM] key[${i + 1}/${shuffled.length}] 失敗: ${e.message}`);
-    }
+  try {
+    const { content, data } = await chatOpenCode(baseURL, model, systemPrompt, userContent, headers);
+    recordUsage(data);
+    return content;
+  } catch (e) {
+    line(`[LLM] OpenCode 呼叫失敗: ${e.message}`);
   }
-  error('[LLM] 所有 API Key 均失敗，終止流程');
+  error('[LLM] OpenCode 呼叫失敗，終止流程');
   process.exit(1);
 }