feat: enhance audit logging, add MCP settings, and production docker setup

- Implemented comprehensive audit logging for Tasks, Users, Settings, Goals, Labels, AI Chat, and Rewards.
- Added Admin UI for MCP Server settings and Audit Logs.
- Created docker-compose-production.yml with Traefik configuration.
- Fixed backend bugs (missing storage methods, route closure).
- Added Audit Logging Guidelines.

shared/gamification.ts

@@ -0,0 +1,58 @@
+export const LEVEL_THRESHOLDS = [
+    0,      // Level 1: 0-99
+    100,    // Level 2: 100-249
+    250,    // Level 3: 250-499
+    500,    // Level 4: 500-999
+    1000,   // Level 5: 1000-1999
+    2000,   // Level 6: 2000-3499
+    3500,   // Level 7: 3500-4999
+    5000,   // Level 8: 5000-7499
+    7500,   // Level 9: 7500-9999
+    10000   // Level 10: 10000+
+];
+
+export function getLevelFromXP(xp: number): number {
+    for (let i = LEVEL_THRESHOLDS.length - 1; i >= 0; i--) {
+        if (xp >= LEVEL_THRESHOLDS[i]) {
+            return i + 1;
+        }
+    }
+    return 1;
+}
+
+export function getNextLevelXP(level: number): number {
+    if (level >= LEVEL_THRESHOLDS.length) {
+        return LEVEL_THRESHOLDS[LEVEL_THRESHOLDS.length - 1] * 1.5; // Scale indefinitely
+    }
+    return LEVEL_THRESHOLDS[level];
+}
+
+export function getLevelProgress(xp: number): number {
+    const currentLevel = getLevelFromXP(xp);
+    const currentLevelStart = LEVEL_THRESHOLDS[currentLevel - 1];
+    const nextLevelStart = getNextLevelXP(currentLevel);
+
+    if (xp >= nextLevelStart) return 100;
+
+    const progress = ((xp - currentLevelStart) / (nextLevelStart - currentLevelStart)) * 100;
+    return Math.min(100, Math.max(0, progress));
+}
+
+export const RANK_KEYS = [
+    'novice',       // Level 1
+    'apprentice',   // Level 2
+    'journeyman',   // Level 3
+    'artisan',      // Level 4
+    'expert',       // Level 5
+    'master',       // Level 6
+    'grandmaster',  // Level 7
+    'virtuoso',     // Level 8
+    'legend',       // Level 9
+    'mythic'        // Level 10
+];
+
+export function getRankKey(level: number): string {
+    if (level <= 0) return 'novice';
+    if (level > RANK_KEYS.length) return RANK_KEYS[RANK_KEYS.length - 1];
+    return RANK_KEYS[level - 1];
+}