feat: 仓库导入、分支模型重构与审查历史摘要

仓库接入
- 新增「从 Gitea 导入」：用全局 Token 列出可见仓库，一键建配置
- 新增仓库只填 Git 地址，自动解析 owner/name，支持 https/ssh/scp 写法
- 新增「测试连接」按钮，保存前即可校验地址并拉取分支

分支模型
- 由单一 base_branch + glob 改为「一个管理分支 + 多个检查分支」
- 管理分支是唯一合并目标；检查分支全部纳入监控
- 支持从任意分支克隆创建管理分支
- 审查基准改为管理分支的 merge-base；仅目标为管理分支的 PR 才自动合并
- 旧库自动迁移：base_branch 播种 managed_branch，branch_patterns 展开为检查分支

审查历史
- 新增 review_records 表与「审查历史」页
- 记录触发来源、PR 链接、审查范围、阻断阈值、发布方式、自动合并设置、
  排除路径、LLM 模型、token 消耗、耗时、需求背景与全部审查意见
- 详情弹窗一览，支持按仓库过滤

AI 摘要
- 新增独立摘要模块（app/lib/summary.js），与代码审查提示词分离
- 专用提示词输出固定四节、500 字内的中文记录：结论/范围/问题/要点
- 与代码审查共用全局 LLM 设置；摘要失败不影响审查与合并，可单条重跑

修复
- 摘要改用内置 fetch：运行镜像没有 curl，原先 spawn curl 必然 ENOENT
- 去掉 blob:none 部分克隆并把凭据写入 .git/config：
  惰性取 blob 不会带上 per-command extraHeader，私有库会报 could not read Username

UI
- 审查背景改为多行文本域（可滚动）
- 分支改为可点选列表，管理分支高亮
- 仓库表格展示管理分支与检查分支

app/lib/queue.js

@@ -1,6 +1,10 @@
 /** Sequential job worker with retry and stale-job recovery. */
-import { claimNextJob, updateJob } from "./db.js";
+import {
+  claimNextJob, claimPendingSummary, requeueStaleSummaries,
+  updateJob, updateReviewRecord,
+} from "./db.js";
 import { SkipJob } from "./review.js";
+import { summariseReview } from "./summary.js";
 
 const STALE_MS = 2 * 60 * 60 * 1000;
 
@@ -21,6 +25,8 @@ export class JobQueue {
     if (this.running) return;
     this.running = true;
     this.recoverStale();
+    const requeued = requeueStaleSummaries(this.db);
+    if (requeued) this.logger.warn?.(`requeued ${requeued} interrupted summariser task(s)`);
     this.tick();
   }
 
@@ -51,6 +57,8 @@ export class JobQueue {
     }
     const job = claimNextJob(this.db);
     if (!job) {
+      // Nothing to review: use the idle slot for pending summaries.
+      await this.runSummaryOnce();
       this.timer = setTimeout(() => this.tick(), this.pollMs);
       return;
     }
@@ -74,6 +82,65 @@ export class JobQueue {
       this.busy = false;
       this.currentJobId = null;
     }
+    // Summarising runs on the same worker so it never competes with a review
+    // for the LLM endpoint.
+    await this.runSummaryOnce();
     this.timer = setTimeout(() => this.tick(), this.pollMs);
   }
+
+  /**
+   * Summarise one finished review, if any is pending.
+   * Failures are recorded on the record and never block the queue.
+   */
+  async runSummaryOnce() {
+    const record = claimPendingSummary(this.db);
+    if (!record) return false;
+    try {
+      const repo = this.db.prepare("SELECT * FROM repositories WHERE id = ?").get(record.repo_id);
+      if (!repo) {
+        updateReviewRecord(this.db, record.id, {
+          summary_status: "skipped", summary_error: "repository no longer exists",
+        });
+        return false;
+      }
+      let findings = [];
+      try { findings = JSON.parse(record.findings_json || "[]"); } catch { findings = []; }
+      const job = this.db.prepare("SELECT result_json FROM jobs WHERE id = ?").get(record.job_id);
+      let summary = null;
+      try { summary = JSON.parse(job?.result_json || "{}").summary ?? null; } catch { summary = null; }
+
+      const llm = {
+        url: repo.llm_base_url || this.engine.config.llmUrl,
+        token: repo.llm_token || this.engine.config.llmToken,
+        model: repo.llm_model || this.engine.config.llmModel,
+        protocol: repo.llm_provider || this.engine.config.llmProtocol,
+        authHeader: this.engine.config.llmAuthHeader,
+        extraHeaders: this.engine.config.llmExtraHeaders,
+      };
+      this.logger.info?.(`summarising review record #${record.id} (${repo.owner}/${repo.name} ${record.ref_name})`);
+      const res = await summariseReview({
+        llm, repo, record, findings, summary, requirement: record.requirement,
+      });
+      if (res.ok) {
+        updateReviewRecord(this.db, record.id, {
+          summary_status: "done",
+          summary: res.text,
+          summary_model: res.model,
+          summary_error: res.complete ? null : "摘要缺少标准小节，已按原文保存",
+        });
+        this.logger.info?.(`review record #${record.id} summarised (${res.text.length} chars)`);
+      } else {
+        updateReviewRecord(this.db, record.id, {
+          summary_status: "failed", summary_error: String(res.error).slice(0, 500),
+        });
+        this.logger.warn?.(`review record #${record.id} summary failed: ${res.error}`);
+      }
+    } catch (err) {
+      updateReviewRecord(this.db, record.id, {
+        summary_status: "failed", summary_error: String(err.message || err).slice(0, 500),
+      });
+      this.logger.warn?.(`review record #${record.id} summary error: ${err.message}`);
+    }
+    return true;
+  }
 }