Implement unified Telegram bot interface with Login/Logout and fix callback_data limits

**Interface improvements:**
- Add persistent Login/Logout buttons to main menu
- Help button now updates text above menu (not separate message)
- Expired token automatically transforms menu to Login state
- Consolidate linking success messages (single welcome + menu)

**Fix callback_data length limits (Telegram 64-byte limit):**
- Truncate client/supplier names to 40 chars in callback_data
- Use full names for API calls but truncated for buttons
- Fix pagination buttons for long partner names (30 chars limit)
- Search entities by prefix match to handle truncated names

**Treasury improvements:**
- Show ALL bank/cash accounts (removed 5-item limit)
- Remove unnecessary Refresh/Export buttons from treasury views
- Handle "Message is not modified" error gracefully

**Bug fixes:**
- Fix Markdown parsing errors (replace <cod> with `CODUL_TAU`)
- Fix silent errors when token expires (show user-friendly message)
- Fix Button_data_invalid errors on pagination and details

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

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

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

@@ -124,13 +124,10 @@ def format_treasury_casa_response(data: Dict[str, Any], company_name: str = None
     casa_accounts = data.get('accounts', [])
     if casa_accounts:
         text += "**Conturi de Casa:**\n"
-        for acc in casa_accounts[:5]:  # Max 5
+        for acc in casa_accounts:  # Show all accounts
             name = acc.get('name', 'N/A')
             balance = round(acc.get('balance', 0))
             text += f"  - {name}: {balance:,} RON\n"
-
-        if len(casa_accounts) > 5:
-            text += f"  ... si inca {len(casa_accounts) - 5} conturi"
     else:
         text += "Nu exista conturi de casa configurate."
 
@@ -162,13 +159,10 @@ def format_treasury_banca_response(data: Dict[str, Any], company_name: str = Non
     bank_accounts = data.get('accounts', [])
     if bank_accounts:
         text += "**Conturi Bancare:**\n"
-        for acc in bank_accounts[:5]:  # Max 5
+        for acc in bank_accounts:  # Show all accounts
             name = acc.get('name', 'N/A')
             balance = round(acc.get('balance', 0))
             text += f"  - {name}: {balance:,} RON\n"
-
-        if len(bank_accounts) > 5:
-            text += f"  ... si inca {len(bank_accounts) - 5} conturi"
     else:
         text += "Nu exista conturi bancare configurate."