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/server/modules/proxy/clients/upstream-error.ts

@@ -15,9 +15,23 @@ export class UpstreamRequestError extends Error {
   }) {
     super(params.message);
     this.name = 'UpstreamRequestError';
+
+    if (params.status && typeof params.status !== 'number') {
+      throw new TypeError('status must be a number');
+    }
+    if (params.headers && typeof params.headers !== 'object') {
+      throw new TypeError('headers must be an object');
+    }
+
     this.status = params.status;
     this.headers = params.headers;
-    this.body = params.body;
+
+    // Sanitize and limit body size
+    if (typeof params.body === 'string') {
+      const sanitized = params.body.replace(/<[^>]*>?/gm, '');
+      this.body = sanitized.substring(0, 1000);
+    } else {
+      this.body = undefined;
+    }
   }
 }
-

src/server/modules/proxy/proxy.service.ts

@@ -29,7 +29,10 @@ import {
   AnthropicContent,
 } from './interfaces/request-interfaces';
 import { getServerConfig } from '../../server-config';
-import { normalizeGeminiModelAlias, resolveModelRoute } from '../../../lib/antigravity/ModelMapping';
+import {
+  normalizeGeminiModelAlias,
+  resolveModelRoute,
+} from '../../../lib/antigravity/ModelMapping';
 import { getMaxOutputTokens, getThinkingBudget } from '../../../lib/antigravity/ModelSpecs';
 import { resolveRequestUserAgent } from './request-user-agent';
 import { UpstreamRequestError } from './clients/upstream-error';
@@ -679,7 +682,9 @@ export class ProxyService {
     for (let i = 0; i < maxRetries; i++) {
       if (i > 0) {
         const delay = calculateRetryDelay(i - 1);
-        this.logger.log(`OpenAI-compatible retry ${i + 1}/${maxRetries}, backoff=${delay}ms (jittered)`);
+        this.logger.log(
+          `OpenAI-compatible retry ${i + 1}/${maxRetries}, backoff=${delay}ms (jittered)`,
+        );
         await sleep(delay);
       }
 

src/server/modules/proxy/token-manager.service.ts

@@ -435,6 +435,10 @@ export class TokenManagerService implements OnModuleInit {
     return candidates.find(([accountId]) => accountId === stickyBinding.accountId) ?? null;
   }
 
+  public resetSelectionState(): void {
+    this.currentIndex = 0;
+  }
+
   private pickRoundRobinEntry(candidates: TokenEntry[]): TokenEntry | null {
     if (candidates.length === 0) {
       return null;
@@ -507,10 +511,7 @@ export class TokenManagerService implements OnModuleInit {
 
     const stickyBinding = this.getValidSessionBinding(sessionKey, now);
     if (stickyBinding && mode === 'cache-first') {
-      const waitSec = this.rateLimitTracker.getRemainingWaitSeconds(
-        stickyBinding.accountId,
-        model,
-      );
+      const waitSec = this.rateLimitTracker.getRemainingWaitSeconds(stickyBinding.accountId, model);
       const waitMs = waitSec * 1000;
       const maxWaitMs = this.getMaxWaitDurationMs();
       if (waitMs > 0 && waitMs <= maxWaitMs) {
@@ -586,18 +587,18 @@ export class TokenManagerService implements OnModuleInit {
   ): void {
     const now = Date.now();
     const legacyAccountId = this.predictLegacyAccountCandidateId(allTokens, sessionKey, now);
-    const parityAccountId = this.predictParityAccountCandidateId(
-      allTokens,
-      sessionKey,
-      model,
-      now,
-    );
+    const parityAccountId = this.predictParityAccountCandidateId(allTokens, sessionKey, model, now);
+
+    this.updateShadowStats(legacyAccountId, parityAccountId);
+  }
+
+  private updateShadowStats(legacyId: string | null, parityId: string | null): void {
     this.shadowComparisonCount++;
 
-    if (legacyAccountId !== parityAccountId) {
+    if (legacyId !== parityId) {
       this.shadowMismatchCount++;
       this.logger.warn(
-        `Parity shadow mismatch detected: legacy=${legacyAccountId ?? 'n/a'}, parity=${parityAccountId ?? 'n/a'}`,
+        `Parity shadow mismatch detected: legacy=${legacyId ?? 'n/a'}, parity=${parityId ?? 'n/a'}`,
       );
     }