feat: Complete localization system with i18n and DeepSeek AI translation

🌐 Interface Localization:
- Added i18next for multi-language interface support
- Created LocalizationService with language detection
- Added translation files for Russian and English
- Implemented language selection in user settings

🤖 AI Profile Translation (Premium feature):
- Integrated DeepSeek API for profile translation
- Added TranslationController for translation management
- Premium-only access to profile translation feature
- Support for 10 languages (ru, en, es, fr, de, it, pt, zh, ja, ko)

�� Database & Models:
- Added language field to users table with migration
- Updated User model to support language preferences
- Added language constraints and indexing

🎛️ User Interface:
- Added language settings menu in bot settings
- Implemented callback handlers for language selection
- Added translate profile button for VIP users
- Localized all interface strings

📚 Documentation:
- Created comprehensive LOCALIZATION.md guide
- Documented API usage and configuration
- Added examples for extending language support

package-lock.json

@@ -10,8 +10,9 @@
       "license": "MIT",
       "dependencies": {
         "@types/node-telegram-bot-api": "^0.64.11",
-        "axios": "^1.6.2",
+        "axios": "^1.12.1",
         "dotenv": "^16.6.1",
+        "i18next": "^25.5.2",
         "node-telegram-bot-api": "^0.64.0",
         "pg": "^8.11.3",
         "sharp": "^0.32.6",
@@ -438,6 +439,14 @@
         "@babel/core": "^7.0.0-0"
       }
     },
+    "node_modules/@babel/runtime": {
+      "version": "7.28.4",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.28.4.tgz",
+      "integrity": "sha512-Q/N6JNWvIvPnLDvjlE1OUBLPQHH6l3CltCEsHIujp45zQUSSh8K+gHnaEX45yAT1nyngnINhvWtzN+Nb9D8RAQ==",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@babel/template": {
       "version": "7.27.2",
       "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.27.2.tgz",
@@ -1349,9 +1358,9 @@
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     },
     "node_modules/axios": {
-      "version": "1.12.0",
-      "resolved": "https://registry.npmjs.org/axios/-/axios-1.12.0.tgz",
-      "integrity": "sha512-oXTDccv8PcfjZmPGlWsPSwtOJCZ/b6W5jAMCNcfwJbCzDckwG0jrYJFaWH1yvivfCXjVzV/SPDEhMB3Q+DSurg==",
+      "version": "1.12.1",
+      "resolved": "https://registry.npmjs.org/axios/-/axios-1.12.1.tgz",
+      "integrity": "sha512-Kn4kbSXpkFHCGE6rBFNwIv0GQs4AvDT80jlveJDKFxjbTYMUeB4QtsdPCv6H8Cm19Je7IU6VFtRl2zWZI0rudQ==",
       "dependencies": {
         "follow-redirects": "^1.15.6",
         "form-data": "^4.0.4",
@@ -2993,6 +3002,36 @@
         "node": ">=10.17.0"
       }
     },
+    "node_modules/i18next": {
+      "version": "25.5.2",
+      "resolved": "https://registry.npmjs.org/i18next/-/i18next-25.5.2.tgz",
+      "integrity": "sha512-lW8Zeh37i/o0zVr+NoCHfNnfvVw+M6FQbRp36ZZ/NyHDJ3NJVpp2HhAUyU9WafL5AssymNoOjMRB48mmx2P6Hw==",
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://locize.com"
+        },
+        {
+          "type": "individual",
+          "url": "https://locize.com/i18next.html"
+        },
+        {
+          "type": "individual",
+          "url": "https://www.i18next.com/how-to/faq#i18next-is-awesome.-how-can-i-support-the-project"
+        }
+      ],
+      "dependencies": {
+        "@babel/runtime": "^7.27.6"
+      },
+      "peerDependencies": {
+        "typescript": "^5"
+      },
+      "peerDependenciesMeta": {
+        "typescript": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/ieee754": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
@@ -6255,7 +6294,7 @@
       "version": "5.9.2",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
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-      "dev": true,
+      "devOptional": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"