i18n(finance): full page — tabs/periods/pnl/balance + Expense.CATEGORIES

- All 4 tabs (Overview/Cashflow/P&L/Balanță) built with __() around
  the text portion, emoji stays in code
- 4 period presets wrapped with __()
- P&L table Marjă/Marjă piese footer wrapped
- Expense::CATEGORIES values look up through __() in the expensesByCat
  loop so categories show translated (Salariu → Зарплата etc.)
- +25 translations covering all UI copy on /app/finance

306 tests pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Filament/Tenant/Pages/Finance.php

@@ -45,10 +45,10 @@ class Finance extends Page
     public function tabs(): array
     {
         return [
-            'overview' => '📊 Overview',
-            'cashflow' => '💸 Cashflow',
-            'pnl' => '📈 P&L',
-            'balance' => __('⚖️ Balanță'),
+            'overview' => '📊 ' . __('Overview'),
+            'cashflow' => '💸 ' . __('Cashflow'),
+            'pnl' => '📈 ' . __('P&L'),
+            'balance' => '⚖️ ' . __('Balanță'),
         ];
     }
 
@@ -57,8 +57,8 @@ class Finance extends Page
         return [
             'this_month' => __('Luna curentă'),
             'last_month' => __('Luna trecută'),
-            'this_year' => 'Anul curent',
-            'last_30' => 'Ultimele 30 zile',
+            'this_year' => __('Anul curent'),
+            'last_30' => __('Ultimele 30 zile'),
         ];
     }