fix: stop desktop startup update loop — manifest version matches bundles

Do not inflate latest.json from dmg filenames; use build version only.
Add client loop guard when the same update retries without version bump.

Co-authored-by: Cursor <cursoragent@cursor.com>

desktop/src/bridge/updater.ts

@@ -2,6 +2,82 @@ import { check } from '@tauri-apps/plugin-updater';
 import { relaunch } from '@tauri-apps/plugin-process';
 import { getVersion } from '@tauri-apps/api/app';
 
+const UPDATE_LOOP_GUARD_KEY = 'goldenchart:startup-update-guard';
+const UPDATE_LOOP_MAX_ATTEMPTS = 2;
+const UPDATE_LOOP_WINDOW_MS = 15 * 60 * 1000;
+
+function cmpSemver(a: string, b: string): number {
+  const pa = a.split('.').map(Number);
+  const pb = b.split('.').map(Number);
+  for (let i = 0; i < 3; i++) {
+    const d = (pa[i] || 0) - (pb[i] || 0);
+    if (d !== 0) return d;
+  }
+  return 0;
+}
+
+interface UpdateLoopGuard {
+  targetVersion: string;
+  fromVersion: string;
+  attempts: number;
+  lastAt: number;
+}
+
+function readUpdateLoopGuard(): UpdateLoopGuard | null {
+  try {
+    const raw = localStorage.getItem(UPDATE_LOOP_GUARD_KEY);
+    if (!raw) return null;
+    return JSON.parse(raw) as UpdateLoopGuard;
+  } catch {
+    return null;
+  }
+}
+
+function writeUpdateLoopGuard(guard: UpdateLoopGuard) {
+  try {
+    localStorage.setItem(UPDATE_LOOP_GUARD_KEY, JSON.stringify(guard));
+  } catch {
+    /* ignore */
+  }
+}
+
+function clearUpdateLoopGuard() {
+  try {
+    localStorage.removeItem(UPDATE_LOOP_GUARD_KEY);
+  } catch {
+    /* ignore */
+  }
+}
+
+function shouldBlockUpdateLoop(currentVersion: string, targetVersion: string): boolean {
+  const guard = readUpdateLoopGuard();
+  if (!guard) return false;
+  if (guard.targetVersion !== targetVersion) return false;
+  if (currentVersion === targetVersion) return false;
+  if (Date.now() - guard.lastAt > UPDATE_LOOP_WINDOW_MS) return false;
+  return guard.attempts >= UPDATE_LOOP_MAX_ATTEMPTS && guard.fromVersion === currentVersion;
+}
+
+function recordUpdateLoopAttempt(currentVersion: string, targetVersion: string) {
+  const guard = readUpdateLoopGuard();
+  const now = Date.now();
+  if (
+    guard
+    && guard.targetVersion === targetVersion
+    && guard.fromVersion === currentVersion
+    && now - guard.lastAt < UPDATE_LOOP_WINDOW_MS
+  ) {
+    writeUpdateLoopGuard({ ...guard, attempts: guard.attempts + 1, lastAt: now });
+    return;
+  }
+  writeUpdateLoopGuard({
+    targetVersion,
+    fromVersion: currentVersion,
+    attempts: 1,
+    lastAt: now,
+  });
+}
+
 export type DesktopUpdatePhase =
   | 'checking'
   | 'uptodate'
@@ -172,11 +248,29 @@ export async function runDesktopUpdate(
   try {
     const update = await check();
     if (!update) {
+      clearUpdateLoopGuard();
       const message = `최신 버전입니다. (v${currentVersion})`;
       emit(onProgress, { phase: 'uptodate', message, currentVersion });
       return { ok: true, phase: 'uptodate', message, currentVersion };
     }
 
+    if (cmpSemver(update.version, currentVersion) <= 0) {
+      clearUpdateLoopGuard();
+      const message = `최신 버전입니다. (v${currentVersion})`;
+      emit(onProgress, { phase: 'uptodate', message, currentVersion });
+      return { ok: true, phase: 'uptodate', message, currentVersion };
+    }
+
+    if (shouldBlockUpdateLoop(currentVersion, update.version)) {
+      const message =
+        `v${update.version} 업데이트가 반복 실패했습니다. 서버 패키지와 버전이 맞지 않을 수 있습니다. ` +
+        'PC 프로그램 탭에서 설치 파일을 받아 다시 설치해 주세요.';
+      emit(onProgress, { phase: 'error', message, currentVersion, newVersion: update.version });
+      return { ok: false, phase: 'error', message, currentVersion, newVersion: update.version };
+    }
+
+    recordUpdateLoopAttempt(currentVersion, update.version);
+
     emit(onProgress, {
       phase: 'available',
       message: `새 버전 v${update.version}을(를) 받습니다. (현재 v${currentVersion})`,