fix(log): use local time for log cleanup date comparison

Fix timezone issue in cleanupOldLogs: use new Date(year, month-1, day)
instead of new Date(dateString) to ensure consistent local time comparison.

Author: MikotoZero

.github/workflows/auto-assign.yml

@@ -0,0 +1,50 @@
+name: Auto Assign PR
+
+on:
+  pull_request:
+    types: [opened]
+    branches:
+      - main
+
+permissions:
+  pull-requests: write
+
+jobs:
+  assign:
+    name: Auto Assign & Request Review
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Add assignee to PR
+        uses: actions/github-script@v7
+        with:
+          script: |
+            await github.rest.issues.addAssignees({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.payload.pull_request.number,
+              assignees: ['MikotoZero']
+            });
+            console.log(`✅ Assigned MikotoZero to PR #${context.payload.pull_request.number}`);
+
+      # 请求 Copilot 进行代码审查
+      # 注意：需要 PR 创建者有 Copilot Pro 订阅才能生效
+      - name: Request Copilot Code Review
+        uses: actions/github-script@v7
+        continue-on-error: true
+        with:
+          script: |
+            try {
+              // 使用 GitHub API 请求 Copilot review
+              // 这个 API 是 GitHub Copilot code review 的公开接口
+              await github.request('POST /repos/{owner}/{repo}/pulls/{pull_number}/requested_reviewers', {
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                pull_number: context.payload.pull_request.number,
+                reviewers: ['copilot-pull-request-reviewer[bot]']
+              });
+              console.log(`✅ Requested Copilot review for PR #${context.payload.pull_request.number}`);
+            } catch (error) {
+              console.log(`⚠️ Could not request Copilot review: ${error.message}`);
+              console.log('This may require the PR author to have Copilot Pro subscription.');
+            }

src/core/utils/logWriter.ts

@@ -228,10 +228,18 @@ export class LogWriter {
       for (const file of files) {
         const match = file.match(pattern);
         if (match) {
-          const fileDate = new Date(match[1]);
-          if (fileDate < cutoffDate) {
-            await fs.promises.unlink(path.join(this.config.logDir, file));
-            process.stderr.write(`[LogWriter] Deleted old log: ${file}\n`);
+          // 使用本地时间创建日期，避免时区问题
+          // new Date("YYYY-MM-DD") 会被解释为 UTC 时间，而 cutoffDate 是本地时间
+          const [yearStr, monthStr, dayStr] = match[1].split('-');
+          const year = Number(yearStr);
+          const month = Number(monthStr);
+          const day = Number(dayStr);
+          if (!Number.isNaN(year) && !Number.isNaN(month) && !Number.isNaN(day)) {
+            const fileDate = new Date(year, month - 1, day); // 本地时间
+            if (fileDate < cutoffDate) {
+              await fs.promises.unlink(path.join(this.config.logDir, file));
+              process.stderr.write(`[LogWriter] Deleted old log: ${file}\n`);
+            }
           }
         }
       }