feat: add GPS tracking with Traccar integration

- Add GPS module with Traccar client service for device management
- Add driver enrollment flow with QR code generation
- Add real-time location tracking on driver profiles
- Add GPS settings configuration in admin tools
- Add Auth0 OpenID Connect setup script for Traccar
- Add deployment configs for production server
- Update nginx configs for SSL on GPS port 5055
- Add timezone setting support
- Various UI improvements and bug fixes

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/signal/signal.service.ts

@@ -106,7 +106,12 @@ export class SignalService {
   /**
    * Register a new phone number (requires verification)
    */
-  async registerNumber(phoneNumber: string, captcha?: string): Promise<{ success: boolean; message: string }> {
+  async registerNumber(phoneNumber: string, captcha?: string): Promise<{
+    success: boolean;
+    message: string;
+    captchaRequired?: boolean;
+    captchaUrl?: string;
+  }> {
     try {
       const response = await this.client.post(`/v1/register/${phoneNumber}`, {
         captcha,
@@ -118,10 +123,27 @@ export class SignalService {
         message: 'Verification code sent. Check your phone.',
       };
     } catch (error: any) {
-      this.logger.error('Failed to register number:', error.message);
+      const errorMessage = error.response?.data?.error || error.message;
+      this.logger.error('Failed to register number:', errorMessage);
+
+      // Check if CAPTCHA is required
+      const isCaptchaRequired =
+        errorMessage.toLowerCase().includes('captcha') ||
+        error.response?.status === 402; // Signal uses 402 for captcha requirement
+
+      if (isCaptchaRequired) {
+        return {
+          success: false,
+          captchaRequired: true,
+          captchaUrl: 'https://signalcaptchas.org/registration/generate.html',
+          message:
+            'CAPTCHA verification required. Please solve the CAPTCHA and submit the token.',
+        };
+      }
+
       return {
         success: false,
-        message: error.response?.data?.error || error.message,
+        message: errorMessage,
       };
     }
   }
@@ -151,7 +173,8 @@ export class SignalService {
    */
   async unlinkAccount(phoneNumber: string): Promise<{ success: boolean; message: string }> {
     try {
-      await this.client.delete(`/v1/accounts/${phoneNumber}`);
+      // Use POST /v1/unregister/{number} - the correct Signal API endpoint
+      await this.client.post(`/v1/unregister/${phoneNumber}`);
 
       return {
         success: true,