Add structured logging, navigation bar, and code cleanup

## Backend
- Add Pino logging framework with timestamps and structured output
- Replace all console.error statements (49+) with proper logging levels
- Fix Drizzle ORM bug: replace invalid .get() calls with .limit(1)
- Remove unused auth routes file (already in index.js)
- Make internal functions private (remove unnecessary exports)
- Simplify code by removing excessive debug logging

## Frontend
- Add navigation bar to layout with:
  - User's callsign display
  - Navigation links (Dashboard, QSOs, Settings)
  - Logout button with red color distinction
- Navigation only shows when user is logged in
- Dark themed design matching footer

## Documentation
- Update README.md with new project structure
- Update docs/DOCUMENTATION.md with logging and nav bar info
- Add logger.js to configuration section

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

src/backend/init-db.js

@@ -1,26 +1,15 @@
-import Database from 'bun:sqlite';
-import { drizzle } from 'drizzle-orm/bun-sqlite';
-import * as schema from './db/schema/index.js';
+import logger from './config/logger.js';
+import { execSync } from 'child_process';
 
-const sqlite = new Database('./award.db');
-const db = drizzle({
-  client: sqlite,
-  schema,
-});
-
-console.log('Creating database tables...');
-
-// Use drizzle-kit to push the schema
-// Since we don't have migrations, let's use the push command
-const { execSync } = await import('child_process');
+logger.info('Initializing database...');
 
 try {
   execSync('bun drizzle-kit push', {
     cwd: '/Users/joergdorgeist/Dev/award',
     stdio: 'inherit'
   });
-  console.log('✓ Database initialized successfully!');
+  logger.info('Database initialized successfully');
 } catch (error) {
-  console.error('Failed to initialize database:', error);
+  logger.error('Failed to initialize database', { error: error.message });
   process.exit(1);
 }