refactor: Remove deprecated INTERNAL_API_PORT (ultrathin monolith cleanup)

Architecture cleanup after migration to ultrathin monolith:

- Remove INTERNAL_API_PORT from .env files (was port 8002)
- Clean up bot_main.py: remove uvicorn, Thread, run_internal_api()
- Update validate.md to check /api/telegram/health instead of port 8002
- Add deprecation notices to old Windows deployment docs
- Update docs/telegram/README.md with architecture note

The Telegram internal API is now served at /api/telegram/internal/*
on the main backend port (8000/8001) instead of separate port 8002.

Also includes: menu updates, ServerLogsView improvements, script fixes

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

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

backend/.env.dev.example

@@ -143,7 +143,7 @@ TELEGRAM_BOT_TOKEN=your_bot_token_from_botfather
 BACKEND_URL=http://localhost:8000
 
 # Internal API port (bot's internal API for backend callbacks)
-INTERNAL_API_PORT=8002
+# INTERNAL_API_PORT=8002  # DEPRECATED: Now served via main app at /api/telegram/internal/*
 
 # Enable internal API documentation (development only)
 ENABLE_DOCS=false

backend/.env.prod.example

@@ -137,7 +137,7 @@ TELEGRAM_BOT_TOKEN=your_bot_token_from_botfather
 BACKEND_URL=http://localhost:8000
 
 # Internal API port (bot's internal API for backend callbacks)
-INTERNAL_API_PORT=8002
+# INTERNAL_API_PORT=8002  # DEPRECATED: Now served via main app at /api/telegram/internal/*
 
 # Enable internal API documentation (DISABLE in production!)
 ENABLE_DOCS=false

backend/.env.test.example

@@ -144,7 +144,7 @@ TELEGRAM_BOT_TOKEN=8483383555:AAGNY1z6WiBkvVfy1ZV_gM_JnAqW4q4MlEY
 BACKEND_URL=http://localhost:8000
 
 # Internal API port (bot's internal API for backend callbacks)
-INTERNAL_API_PORT=8002
+# INTERNAL_API_PORT=8002  # DEPRECATED: Now served via main app at /api/telegram/internal/*
 
 # Enable internal API documentation (development only)
 ENABLE_DOCS=false

backend/modules/telegram/bot_main.py

@@ -10,8 +10,7 @@ import logging
 import os
 from pathlib import Path
 from dotenv import load_dotenv
-import uvicorn
-from threading import Thread
+# Note: uvicorn and threading removed - internal API now served via main.py
 
 # ============================================================================
 # LOAD ENVIRONMENT VARIABLES FIRST - BEFORE ANY APP IMPORTS
@@ -69,8 +68,7 @@ from backend.modules.telegram.bot.handlers import (
 # Import email authentication handler
 from backend.modules.telegram.bot.email_handlers import email_login_handler
 
-# Import internal API
-from backend.modules.telegram.internal_api import internal_api
+# Note: internal_api import removed - now served via main.py at /api/telegram/internal/*
 
 # Configure logging
 logging.basicConfig(
@@ -82,7 +80,7 @@ logger = logging.getLogger(__name__)
 # Environment variables (already loaded above)
 TELEGRAM_BOT_TOKEN = os.getenv('TELEGRAM_BOT_TOKEN')
 BACKEND_URL = os.getenv('BACKEND_URL', 'http://localhost:8000')
-INTERNAL_API_PORT = int(os.getenv('INTERNAL_API_PORT', '8002'))
+# Note: INTERNAL_API_PORT removed - internal API now served via main.py
 
 
 # ============================================================================
@@ -153,29 +151,10 @@ def create_telegram_application() -> Application:
     return application
 
 
-# ============================================================================
-# INTERNAL API SERVER
-# ============================================================================
-
-def run_internal_api():
-    """
-    Run the internal FastAPI server in a separate thread.
-
-    This API handles communication from the backend (saving auth codes).
-    """
-    logger.info(f"Starting internal API on port {INTERNAL_API_PORT}...")
-
-    uvicorn.run(
-        internal_api,
-        host="0.0.0.0",
-        port=INTERNAL_API_PORT,
-        log_level="info"
-    )
-
-
 # ============================================================================
 # STARTUP/SHUTDOWN
 # ============================================================================
+# Note: Internal API server removed - now served via main.py at /api/telegram/internal/*
 
 async def startup():
     """
@@ -247,10 +226,7 @@ async def main():
         # Create Telegram application
         telegram_app = create_telegram_application()
 
-        # Start internal API in a separate thread
-        api_thread = Thread(target=run_internal_api, daemon=True)
-        api_thread.start()
-        logger.info(f"✅ Internal API started on port {INTERNAL_API_PORT}")
+        # Note: Internal API server removed - now served via main.py
 
         # Start scheduled cleanup task in background
         cleanup_task = asyncio.create_task(scheduled_cleanup())