feat(telegram): Unify Trezorerie button (Casa + Banca combined)

- Replace separate [Trezorerie Casa] and [Trezorerie Banca] buttons
  with single unified [Trezorerie] button in main menu
- Add format_treasury_combined_response() formatter showing:
  - Grand total (Sold Trezorerie)
  - Casa section with total + all accounts
  - Banca section with total + all accounts
- Compact menu layout: Row 2 [Sold Companie][Trezorerie],
  Row 3 [Sold Clienti][Sold Furnizori], Row 4 [Evolutie Incasari]
- Use Romanian number format (period as thousands separator)

Also includes:
- Oracle pool: Support both SERVICE_NAME and SID connections
  (ORACLE_SERVICE_NAME takes priority over ORACLE_SID)

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

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

.auto-build/specs/telegram-trezorerie/plan.md

@@ -0,0 +1,106 @@
+# Implementation Plan: telegram-trezorerie
+
+**Status**: ✅ COMPLETE
+**Created**: 2025-12-30T18:45:00Z
+
+## Progress Tracker
+
+| Task | Status | Completed |
+|------|--------|-----------|
+| Task 1: Add unified formatter | ✅ Done | 2025-12-30 18:48 |
+| Task 2: Update main menu layout | ✅ Done | 2025-12-30 18:49 |
+| Task 3: Add callback handler | ✅ Done | 2025-12-30 18:50 |
+| Task 4: Manual testing | ✅ Done | 2025-12-30 18:51 |
+
+## Tasks
+
+### Task 1: Add unified formatter
+- **Status**: ✅ Done (2025-12-30 18:48)
+- **Files**: `backend/modules/telegram/bot/formatters.py`
+- **Description**: Add `format_treasury_combined_response()` function after line 187 (after `format_treasury_banca_response`). This new formatter will:
+  - Calculate grand total (casa + banca)
+  - Format unified message with three sections: Grand Total, Casa breakdown, Banca breakdown
+  - Follow existing patterns (Markdown bold, account lists, RON amounts with thousands separator)
+- **Dependencies**: None
+
+### Task 2: Update main menu layout
+- **Status**: ✅ Done (2025-12-30 18:49)
+- **Files**: `backend/modules/telegram/bot/menus.py`
+- **Description**: Update `create_main_menu()` function (lines 233-247) to:
+  - Replace 2-button rows (Trezorerie Casa + Trezorerie Banca) with single "Trezorerie" button
+  - Compact layout: Row 2 [Sold Companie][Trezorerie], Row 3 [Sold Clienti][Sold Furnizori], Row 4 [Evolutie Incasari]
+  - Use callback_data="menu:trezorerie" for new button
+- **Dependencies**: None
+
+### Task 3: Add callback handler
+- **Status**: ✅ Done (2025-12-30 18:50)
+- **Files**: `backend/modules/telegram/bot/handlers.py`
+- **Description**: Add `menu:trezorerie` case in `button_callback()` function after line 1485 (before existing casa/banca handlers). The handler will:
+  - Call `get_treasury_breakdown_split()` to get data
+  - Use new `format_treasury_combined_response()` formatter
+  - Add performance footer
+  - Display with action buttons
+- **Dependencies**: Task 1
+
+### Task 4: Manual testing
+- **Status**: ✅ Done (2025-12-30 18:51)
+- **Files**: None (testing only)
+- **Description**: Test the implementation:
+  - Verify new menu layout shows single [Trezorerie] button
+  - Verify unified view shows grand total + Casa section + Banca section
+  - Verify grand total = Casa total + Banca total
+  - Verify legacy `/trezorerie_casa` and `/trezorerie_banca` commands still work
+  - Verify [Menu Principal] button returns to menu
+- **Dependencies**: Tasks 1, 2, 3
+
+## Implementation Notes
+
+### Existing Code Patterns
+
+**Formatter pattern** (from `format_treasury_casa_response`):
+```python
+def format_treasury_xxx_response(data: Dict[str, Any], company_name: str = None) -> str:
+    text = ""
+    total = round(data.get('total', 0))
+    text += f"**Sold Total XXX:** {total:,} RON\n\n"
+    # ... account list
+    return text
+```
+
+**Menu button pattern** (from `create_main_menu`):
+```python
+InlineKeyboardButton("Button Text", callback_data="menu:action")
+```
+
+**Callback handler pattern** (from existing casa handler):
+```python
+elif action == "trezorerie":
+    from backend.modules.telegram.bot.helpers import get_treasury_breakdown_split
+    treasury_data = await get_treasury_breakdown_split(company['id'], jwt_token)
+    from backend.modules.telegram.bot.formatters import format_treasury_combined_response, add_performance_footer
+    from backend.modules.telegram.bot.menus import create_action_buttons, format_response_with_company
+    content = format_treasury_combined_response(treasury_data)
+    response = format_response_with_company(content, company['name'])
+    # ... performance footer
+    keyboard = create_action_buttons("trezorerie", show_export=False, show_refresh=False)
+    # ... edit message
+```
+
+### Data Structure
+
+The `get_treasury_breakdown_split()` helper returns:
+```python
+{
+    'casa': {
+        'accounts': [{'name': str, 'balance': float, 'cont': str}, ...],
+        'total': float
+    },
+    'banca': {
+        'accounts': [{'name': str, 'balance': float, 'cont': str}, ...],
+        'total': float
+    },
+    'cache_hit': bool,
+    'response_time_ms': int,
+    'cache_source': str | None
+}
+```