feat: Add A-Z filter for clients/suppliers in Telegram bot

- Add A-Z alphabetical filter keyboard for clients and suppliers lists
  (same pattern as company selection, without emoji)
- Increase clients/suppliers list pagination from 10 to 20 items per page
- Remove emoji from company A-Z filter button for consistency
- Add 6 new callback handlers: clients_alpha_menu, clients_alpha:LETTER,
  clients_alpha_page:PAGE:LETTER, and supplier equivalents
- Dashboard service and models updates
- Telegram bot: email handlers, auth, DB operations, internal API improvements
- Frontend: dashboard cards updates (CashFlow, Clienti, Furnizori, Treasury)
- Frontend: SolduriCompactCard and CollapsibleCard improvements
- DashboardView enhancements
- start.sh and run-with-restart.sh script updates
- IIS web.config and service worker updates

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/modules/reports/models/dashboard.py

@@ -2,6 +2,22 @@ from pydantic import BaseModel
 from decimal import Decimal
 from typing import List, Dict, Optional, Any
 
+
+class BudgetDebtSubAccount(BaseModel):
+    """Cont individual din cadrul unui grup de datorii buget"""
+    cont: str           # ex: "4311"
+    label: str          # ex: "4311 - CAS angajat"
+    precedent: Decimal  # sold luna precedentă (pozitiv=datorie, negativ=creanță)
+    curent: Decimal     # sold luna curentă (pozitiv=datorie, negativ=creanță)
+
+class BudgetDebtGroup(BaseModel):
+    """Grup de datorii la buget (TVA / BASS / CAM)"""
+    key: str                              # 'TVA', 'BASS', 'CAM'
+    label: str                            # 'TVA', 'BASS', 'CAM'
+    precedent: Decimal                    # total grup luna prec (semn ±)
+    curent: Decimal                       # total grup luna crt (semn ±)
+    sub_accounts: List[BudgetDebtSubAccount] = []
+
 class TreasuryAccount(BaseModel):
     """Cont de trezorerie (bancă/casă)"""
     cont: str           # 5121, 5124, 5311, 5314
@@ -126,4 +142,8 @@ class DashboardSummary(BaseModel):
     tva_plata_precedent: Decimal = Decimal('0')
     tva_recuperat_precedent: Decimal = Decimal('0')
     tva_plata_curent: Decimal = Decimal('0')
-    tva_recuperat_curent: Decimal = Decimal('0')
+    tva_recuperat_curent: Decimal = Decimal('0')
+
+    # DATORII LA BUGET - breakdown pe grupe (TVA / BASS / CAM) cu sub-conturi
+    budget_debt_breakdown: List[BudgetDebtGroup] = []
+    budget_debt_total_precedent: Decimal = Decimal('0')  # suma tuturor grupurilor luna prec