feat: Runtime configuration and Docker deployment improvements

Frontend:
- Add runtime configuration service for deployment-time API URL injection
- Create docker-entrypoint.sh to generate config.json from environment variables
- Update ApiService, ApprovalService, and DocumentViewer to use RuntimeConfigService
- Add APP_INITIALIZER to load runtime config before app starts

Backend:
- Fix init-blockchain.js to properly quote mnemonic phrases in .env file
- Improve docker-entrypoint.sh with health checks and better error handling

Docker:
- Add API_BASE_URL environment variable to frontend container
- Update docker-compose.yml with clear documentation for remote deployment
- Reorganize .env.example with clear categories (REQUIRED FOR REMOTE, PRODUCTION, AUTO-GENERATED)

Workflow fixes:
- Fix DepartmentApproval interface to match backend schema
- Fix stage transformation for 0-indexed stageOrder
- Fix workflow list to show correct stage count from definition.stages

Cleanup:
- Move development artifacts to .trash directory
- Remove root-level package.json (was only for utility scripts)
- Add .trash/ to .gitignore

backend/scripts/init-blockchain.js

@@ -140,6 +140,7 @@ async function deployPlaceholderContract(wallet, name) {
 
 /**
  * Update .env file with generated values
+ * Values containing spaces are quoted for shell compatibility
  */
 function updateEnvFile(values) {
   const envPath = path.join(__dirname, '../.env');
@@ -151,11 +152,13 @@ function updateEnvFile(values) {
 
   // Update or add each value
   for (const [key, value] of Object.entries(values)) {
+    // Quote values that contain spaces (like mnemonic phrases)
+    const formattedValue = value.includes(' ') ? `"${value}"` : value;
     const regex = new RegExp(`^${key}=.*$`, 'm');
     if (regex.test(envContent)) {
-      envContent = envContent.replace(regex, `${key}=${value}`);
+      envContent = envContent.replace(regex, `${key}=${formattedValue}`);
     } else {
-      envContent += `\n${key}=${value}`;
+      envContent += `\n${key}=${formattedValue}`;
     }
   }