Enhance Telegram bot UI with YTD comparison, 12-month evolution, and improved navigation

- Add YTD year-over-year comparison table for cash flow evolution
- Extend monthly evolution from 6 to 12 months with dynamic year extraction
- Simplify monthly view to show only Net values aligned with YTD table
- Upgrade client/supplier display from Top 5 to Top 10 with alphabetical sorting
- Remove Refresh and Export buttons from dashboard and evolution views
- Add get_trends() API method for 12-month historical data from backend
- Fix default years to 2025/2024 for accurate YTD calculations

Changes:
- client.py: New get_trends() method calls /api/dashboard/trends endpoint
- helpers.py: Rewrite get_cashflow_evolution_data() to use trends and calculate YTD
- formatters.py: Complete redesign with YTD table and simplified 12-month Net view
- menus.py: Alphabetical sorting for clients/suppliers, removed refresh buttons
- handlers.py: Disabled refresh/export buttons on dashboard and evolution views

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

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

reports-app/telegram-bot/app/bot/handlers.py

@@ -984,7 +984,7 @@ async def evolutie_command(update: Update, context: ContextTypes.DEFAULT_TYPE):
             evolution_data['monthly']
         )
         response = format_response_with_company(content, company['name'])
-        keyboard = create_action_buttons("evolutie", show_export=False)
+        keyboard = create_action_buttons("evolutie", show_export=False, show_refresh=False)
 
         await update.message.reply_text(
             response,
@@ -1301,7 +1301,7 @@ async def handle_menu_callback(query, telegram_user_id: int, callback_data: str)
             evolution_data['monthly']
         )
         response = format_response_with_company(content, company['name'])
-        keyboard = create_action_buttons("evolutie", show_export=False)
+        keyboard = create_action_buttons("evolutie", show_export=False, show_refresh=False)
 
         await query.edit_message_text(
             response,
@@ -2149,7 +2149,7 @@ async def _handle_sold_view(
 
         content = format_dashboard_response(data)
         response = format_response_with_company(content, company['name'])
-        keyboard = create_action_buttons("sold", show_export=True)
+        keyboard = create_action_buttons("sold", show_export=False, show_refresh=False)
 
         if is_callback:
             await query_or_update.edit_message_text(