feat: account management overhaul + 7 issue resolutions (#147)

- Add smart JSON export/import with schema validation and deduplication
- Add per-account proxy configurations (Issue #79)
- Add advanced account sorting engine (Issues #126 & #99)
- Add compact horizontal layout, AI credits, inline model visibility (Issues #145 & #134)
- Add desktop push notifications for low quota (Issue #53)
- Fix Arch Linux AUR process detection bug (Issue #117)
- Default theme set to Dark Mode (it's better)
- UI Polishing: Improved sort dropdown and symmetrical dialog layouts
- Dev Mode: Resolved port conflicts and single-instance locks
- Updated README and README.zh-CN with new features

src/services/CloudMonitorService.ts

@@ -1,3 +1,4 @@
+import { Notification } from 'electron';
 import { CloudAccountRepo } from '../ipc/database/cloudHandler';
 import { GoogleAPIService } from './GoogleAPIService';
 import { AutoSwitchService } from './AutoSwitchService';
@@ -101,18 +102,33 @@ export class CloudMonitorService {
           let accessToken = account.token.access_token;
           if (account.token.expiry_timestamp < now + 600) {
             logger.info(`Monitor: Refreshing token for ${account.email}`);
-            const newToken = await GoogleAPIService.refreshAccessToken(account.token.refresh_token);
-            account.token.access_token = newToken.access_token;
-            account.token.expires_in = newToken.expires_in;
-            account.token.expiry_timestamp = now + newToken.expires_in;
-            await CloudAccountRepo.updateToken(account.id, account.token);
-            accessToken = newToken.access_token;
+            try {
+              const newToken = await GoogleAPIService.refreshAccessToken(
+                account.token.refresh_token,
+                account.proxy_url,
+              );
+              account.token.access_token = newToken.access_token;
+              account.token.expires_in = newToken.expires_in;
+              account.token.expiry_timestamp = now + newToken.expires_in;
+              await CloudAccountRepo.updateToken(account.id, account.token);
+              accessToken = newToken.access_token;
+            } catch (refreshError) {
+              logger.error(`Monitor: Token refresh failed for ${account.email}`, refreshError);
+              continue;
+            }
           }
 
-          // 2. Fetch Quota
-          // We delay slightly between requests to act human/avoid spike
           await new Promise((r) => setTimeout(r, 1000));
-          const quota = await GoogleAPIService.fetchQuota(accessToken);
+          const quota = await GoogleAPIService.fetchQuota(accessToken, account.proxy_url);
+
+          try {
+            const aiCredits = await GoogleAPIService.fetchAICredits(accessToken, account.proxy_url);
+            if (aiCredits) {
+              quota.ai_credits = aiCredits;
+            }
+          } catch (creditError) {
+            logger.warn(`Monitor: Failed to fetch credits for ${account.email}`, creditError);
+          }
 
           // 3. Update DB
           await CloudAccountRepo.updateQuota(account.id, quota);
@@ -123,7 +139,30 @@ export class CloudMonitorService {
         }
       }
 
-      // 4. Check for Auto-Switch
+      // 4. Check for Quota Alerts
+      const alertEnabled = CloudAccountRepo.getSetting<boolean>('quota_alert_enabled', false);
+      const alertThreshold = CloudAccountRepo.getSetting<number>('quota_alert_threshold', 20);
+
+      if (alertEnabled) {
+        for (const account of accounts) {
+          if (!account.quota?.models) continue;
+          const lowQuotaModels = Object.entries(account.quota.models)
+            .filter(([_, info]) => info.percentage <= alertThreshold && info.percentage > 0)
+            .map(([name, info]) => {
+              return info.display_name || name.replace('models/', '').replace(/-/g, ' ');
+            });
+
+          if (lowQuotaModels.length > 0) {
+            new Notification({
+              title: 'Low Quota Alert',
+              body: `${account.email}: ${lowQuotaModels.join(', ')} are low on quota`,
+              silent: false,
+            }).show();
+          }
+        }
+      }
+
+      // 5. Check for Auto-Switch
       await AutoSwitchService.checkAndSwitchIfNeeded();
     } finally {
       this.isPolling = false;