feat: 同步全部分支的 Git 提交，不再仅限默认分支

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend/src/api/gitea-client.ts

@@ -58,12 +58,22 @@ export async function getRepos(): Promise<GiteaRepo[]> {
   return Array.isArray(data) ? data : [];
 }
 
-export async function getCommits(owner: string, repo: string, since?: string): Promise<GiteaCommit[]> {
+export interface GiteaBranch {
+  name: string;
+}
+
+export async function getBranches(owner: string, repo: string): Promise<GiteaBranch[]> {
+  const data = await giteaGet<GiteaBranch[]>(`/repos/${owner}/${repo}/branches?limit=50`);
+  return Array.isArray(data) ? data : [];
+}
+
+export async function getCommits(owner: string, repo: string, since?: string, branch?: string): Promise<GiteaCommit[]> {
   // 分页拉取所有 commit（每页 50，最多 10 页 = 500 条）
   const all: GiteaCommit[] = [];
   for (let page = 1; page <= 10; page++) {
     let path = `/repos/${owner}/${repo}/commits?limit=50&page=${page}`;
     if (since) path += `&since=${since}`;
+    if (branch) path += `&sha=${encodeURIComponent(branch)}`;
     const data = await giteaGet<GiteaCommit[]>(path);
     if (!Array.isArray(data) || data.length === 0) break;
     all.push(...data);

backend/src/sync/sync-gitea.ts

@@ -70,9 +70,16 @@ export async function syncGitea(): Promise<void> {
 
     for (const repo of reposToSync) {
       try {
-        // Sync commits
+        // Sync commits from all branches
-        const commits = await giteaClient.getCommits(repo.owner, repo.name);
+        const branches = await giteaClient.getBranches(repo.owner, repo.name);
+        const seenShas = new Set<string>();
+
+        for (const branch of branches) {
+          const commits = await giteaClient.getCommits(repo.owner, repo.name, undefined, branch.name);
           for (const commit of commits) {
+            if (seenShas.has(commit.sha)) continue;
+            seenShas.add(commit.sha);
+
             const existingCommit = await db.query.gitCommits.findFirst({
               where: eq(gitCommits.sha, commit.sha),
             });
@@ -101,6 +108,7 @@ export async function syncGitea(): Promise<void> {
               recordsProcessed++;
             }
           }
+        }
 
         // Sync PRs
         const prs = await giteaClient.getPullRequests(repo.owner, repo.name);
@@ -143,7 +151,7 @@ export async function syncGitea(): Promise<void> {
           recordsProcessed++;
         }
 
-        console.info(`[SYNC] Repo ${repo.owner}/${repo.name}: synced`);
+        console.info(`[SYNC] Repo ${repo.owner}/${repo.name}: synced (${branches.length} branches)`);
       } catch (repoErr) {
         const msg = repoErr instanceof Error ? repoErr.message : 'Unknown error';
         console.error(`[SYNC] Repo ${repo.owner}/${repo.name} failed:`, msg);