Improve logging, rate limiting, and error handling (#29)

* feat: apply local user changes and fixes

* ;D

* Clean up PR #28: Remove duplicate code lines and unnecessary file

- Remove pullrequest.md (PR notes file not needed in repo)
- Fix duplicate lines in account-manager.js:
  - rateLimitResetTime assignment
  - saveToDisk() calls in markRateLimited and markInvalid
  - invalidReason/invalidAt assignments
  - double return statement in discoverProject

Original PR by M2noa: fix sticky accs, 500s, logging updates, and rate limit handling

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: M2noa <226494568+M2noa@users.noreply.github.com>
Co-Authored-By: Claude <noreply@anthropic.com>

* chore: replace console.log with logger methods for consistency

- Replace all console.log calls with logger.warn/debug in:
  - src/cloudcode-client.js (4 places)
  - src/format/thinking-utils.js (7 places)

This ensures consistent logging behavior with the new logger utility,
respecting --debug mode for verbose output.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

---------

Co-authored-by: M1noa <minoa@minoa.cat>
Co-authored-by: M2noa <226494568+M2noa@users.noreply.github.com>
Co-authored-by: Claude <noreply@anthropic.com>

src/utils/logger.js

@@ -0,0 +1,114 @@
+/**
+ * Logger Utility
+ * 
+ * Provides structured logging with colors and debug support.
+ * Simple ANSI codes used to avoid dependencies.
+ */
+
+const COLORS = {
+    RESET: '\x1b[0m',
+    BRIGHT: '\x1b[1m',
+    DIM: '\x1b[2m',
+    
+    RED: '\x1b[31m',
+    GREEN: '\x1b[32m',
+    YELLOW: '\x1b[33m',
+    BLUE: '\x1b[34m',
+    MAGENTA: '\x1b[35m',
+    CYAN: '\x1b[36m',
+    WHITE: '\x1b[37m',
+    GRAY: '\x1b[90m'
+};
+
+class Logger {
+    constructor() {
+        this.isDebugEnabled = false;
+    }
+
+    /**
+     * Set debug mode
+     * @param {boolean} enabled 
+     */
+    setDebug(enabled) {
+        this.isDebugEnabled = !!enabled;
+    }
+
+    /**
+     * Get current timestamp string
+     */
+    getTimestamp() {
+        return new Date().toISOString();
+    }
+
+    /**
+     * Format and print a log message
+     * @param {string} level 
+     * @param {string} color 
+     * @param {string} message 
+     * @param  {...any} args 
+     */
+    print(level, color, message, ...args) {
+        // Format: [TIMESTAMP] [LEVEL] Message
+        const timestamp = `${COLORS.GRAY}[${this.getTimestamp()}]${COLORS.RESET}`;
+        const levelTag = `${color}[${level}]${COLORS.RESET}`;
+        
+        console.log(`${timestamp} ${levelTag} ${message}`, ...args);
+    }
+
+    /**
+     * Standard info log
+     */
+    info(message, ...args) {
+        this.print('INFO', COLORS.BLUE, message, ...args);
+    }
+
+    /**
+     * Success log
+     */
+    success(message, ...args) {
+        this.print('SUCCESS', COLORS.GREEN, message, ...args);
+    }
+
+    /**
+     * Warning log
+     */
+    warn(message, ...args) {
+        this.print('WARN', COLORS.YELLOW, message, ...args);
+    }
+
+    /**
+     * Error log
+     */
+    error(message, ...args) {
+        this.print('ERROR', COLORS.RED, message, ...args);
+    }
+
+    /**
+     * Debug log - only prints if debug mode is enabled
+     */
+    debug(message, ...args) {
+        if (this.isDebugEnabled) {
+            this.print('DEBUG', COLORS.MAGENTA, message, ...args);
+        }
+    }
+
+    /**
+     * Direct log (for raw output usually) - proxied to console.log but can be enhanced
+     */
+    log(message, ...args) {
+        console.log(message, ...args);
+    }
+    
+    /**
+     * Print a section header
+     */
+    header(title) {
+        console.log(`\n${COLORS.BRIGHT}${COLORS.CYAN}=== ${title} ===${COLORS.RESET}\n`);
+    }
+}
+
+// Export a singleton instance
+export const logger = new Logger();
+
+// Export class if needed for multiple instances
+export { Logger };