feat: Single-port deployment with improved error handling and SvelteKit static build

- Frontend now uses @sveltejs/adapter-static for production builds
- Backend serves both API and static files from single port (originally port 3000)
- Removed all throw statements from services to avoid Elysia prototype errors
- Fixed favicon serving and SvelteKit assets path handling
- Added ecosystem.config.js for PM2 process management
- Comprehensive deployment documentation (PM2 + HAProxy)
- Updated README with single-port architecture
- Created start.sh script for easy production start

src/backend/services/auth.service.js

@@ -30,8 +30,7 @@ async function verifyPassword(password, hash) {
  * @param {string} userData.email - User email
  * @param {string} userData.password - Plain text password
  * @param {string} userData.callsign - Ham radio callsign
- * @returns {Promise<Object>} Created user object (without password)
- * @throws {Error} If email already exists
+ * @returns {Promise<Object|null>} Created user object (without password) or null if email exists
  */
 export async function registerUser({ email, password, callsign }) {
   // Check if user already exists
@@ -42,7 +41,7 @@ export async function registerUser({ email, password, callsign }) {
     .limit(1);
 
   if (existingUser) {
-    throw new Error('Email already registered');
+    return null;
   }
 
   // Hash password
@@ -79,13 +78,13 @@ export async function authenticateUser(email, password) {
     .limit(1);
 
   if (!user) {
-    throw new Error('Invalid email or password');
+    return null;
   }
 
   // Verify password
   const isValid = await verifyPassword(password, user.passwordHash);
   if (!isValid) {
-    throw new Error('Invalid email or password');
+    return null;
   }
 
   // Return user without password hash

src/backend/services/awards.service.js

@@ -546,7 +546,7 @@ export async function getAwardProgressDetails(userId, awardId) {
   const award = definitions.find((def) => def.id === awardId);
 
   if (!award) {
-    throw new Error('Award not found');
+    return null;
   }
 
   // Calculate progress
@@ -572,7 +572,7 @@ export async function getAwardEntityBreakdown(userId, awardId) {
   const award = definitions.find((def) => def.id === awardId);
 
   if (!award) {
-    throw new Error('Award not found');
+    return null;
   }
 
   let { rules } = award;

src/backend/services/job-queue.service.js

@@ -107,7 +107,12 @@ async function processJobAsync(jobId, userId, type, data) {
       // Get the processor for this job type
       const processor = jobProcessors[type];
       if (!processor) {
-        throw new Error(`No processor registered for job type: ${type}`);
+        await updateJob(jobId, {
+          status: JobStatus.FAILED,
+          completedAt: new Date(),
+          error: `No processor registered for job type: ${type}`,
+        });
+        return null;
       }
 
       // Execute the job processor

src/backend/services/lotw.service.js

@@ -84,7 +84,9 @@ async function fetchQSOsFromLoTW(lotwUsername, lotwPassword, sinceDate = null) {
   for (let attempt = 0; attempt < POLLING_CONFIG.maxRetries; attempt++) {
     const elapsed = Date.now() - startTime;
     if (elapsed > POLLING_CONFIG.maxTotalTime) {
-      throw new Error(`LoTW sync timeout: exceeded maximum wait time of ${POLLING_CONFIG.maxTotalTime / 1000} seconds`);
+      return {
+        error: `LoTW sync timeout: exceeded maximum wait time of ${POLLING_CONFIG.maxTotalTime / 1000} seconds`
+      };
     }
 
     if (attempt > 0) {
@@ -104,9 +106,9 @@ async function fetchQSOsFromLoTW(lotwUsername, lotwPassword, sinceDate = null) {
           await sleep(POLLING_CONFIG.retryDelay);
           continue;
         } else if (response.status === 401) {
-          throw new Error('Invalid LoTW credentials. Please check your username and password in Settings.');
+          return { error: 'Invalid LoTW credentials. Please check your username and password in Settings.' };
         } else if (response.status === 404) {
-          throw new Error('LoTW service not found (404). The LoTW API URL may have changed.');
+          return { error: 'LoTW service not found (404). The LoTW API URL may have changed.' };
         } else {
           logger.warn(`LoTW returned ${response.status}, retrying...`);
           await sleep(POLLING_CONFIG.retryDelay);
@@ -117,7 +119,7 @@ async function fetchQSOsFromLoTW(lotwUsername, lotwPassword, sinceDate = null) {
       const adifData = await response.text();
 
       if (adifData.toLowerCase().includes('username/password incorrect')) {
-        throw new Error('Username/password incorrect');
+        return { error: 'Username/password incorrect' };
       }
 
       const header = adifData.trim().substring(0, 39).toLowerCase();
@@ -127,7 +129,8 @@ async function fetchQSOsFromLoTW(lotwUsername, lotwPassword, sinceDate = null) {
           await sleep(POLLING_CONFIG.retryDelay);
           continue;
         }
-        throw new Error('Downloaded LoTW report is invalid. Check your credentials.');
+
+        return { error: 'Downloaded LoTW report is invalid. Check your credentials.' };
       }
 
       logger.info('LoTW report downloaded successfully', { size: adifData.length });
@@ -159,7 +162,9 @@ async function fetchQSOsFromLoTW(lotwUsername, lotwPassword, sinceDate = null) {
   }
 
   const totalTime = Math.round((Date.now() - startTime) / 1000);
-  throw new Error(`LoTW sync failed: Report not ready after ${POLLING_CONFIG.maxRetries} attempts (${totalTime}s). LoTW may be experiencing high load. Please try again later.`);
+  return {
+    error: `LoTW sync failed: Report not ready after ${POLLING_CONFIG.maxRetries} attempts (${totalTime}s). LoTW may be experiencing high load. Please try again later.`
+  };
 }
 
 /**