feat(ai-review 使用量): 新增多平台 AI 助理使用量統計與剩餘可用百分比

app/main.js

@@ -5,6 +5,7 @@ import { getPRDiff, postComment, getCommitMessageBySha, getBotReviewOutcome, sho
 import { analyzeWithRole, loadOldFindings, mergeFindings, sortByLevel, deduplicateWithAI, loadExclusions, applyExclusions, filterFalsePositivesWithAI } from './findings.js';
 import { reconcileConversations, dropResolvedFindings, addCarriedFindings } from './resolve.js';
 import { saveFindings, postFindingsReview, formatFindingsStatsLine } from './comments.js';
+import { getRunUsage, getRateLimit, fetchAccountQuota, formatUsageStats, formatUsageStatsLine } from './usage.js';
 import { cloneRepo, commitAndPush, getRepoState } from './git.js';
 import { validateJSONArrayFile, ensureJSONArrayFileExists } from './json.js';
 import { runPreflight } from './preflight.js';
@@ -53,7 +54,7 @@ async function main() {
     warn(`Step2 對話收斂失敗（繼續執行）: ${e.message}`);
   }
 
-  const { provider, baseURL, model } = getLLMConfig();
+  const { provider, apiKeys, baseURL, model } = getLLMConfig();
   if (!provider) {
     error('未設定任何 LLM API Key，請檢查 action inputs');
     process.exit(1);
@@ -137,6 +138,14 @@ async function main() {
   step('Step6', 'Findings 寫入與 Review 發布');
   const reviewDir = repoDir || WORKSPACE;
   saveFindings(WORKSPACE, filtered, reviewDir);
+
+  // 蒐集 AI 助理使用量：本次 token 消耗 + 剩餘可用百分比（帳號額度優先，否則用回應 header 的速率配額；皆失敗時降級為「無法計算」，不中斷流程）
+  const runUsage = getRunUsage();
+  const quota = await fetchAccountQuota(provider, { apiKeys, baseURL });
+  const rate = getRateLimit();
+  const usageSection = formatUsageStats(provider, model, runUsage, quota, rate);
+  line(`使用量統計: ${formatUsageStatsLine(provider, model, runUsage, quota, rate)}`);
+
   try {
     logFindingsStats('Step6 儲存 findings 統計', filtered);
     logFindingsStats('Step6 review summary 統計', filtered);
@@ -144,6 +153,7 @@ async function main() {
     await postFindingsReview(filtered, {
       summaryFindings: filtered,
       commentFindings: filtered,
+      usageSection,
     });
     ok('Step6 完成');
   } catch (e) {