feat(i18n): wrap 1103 hardcoded UI strings across Filament with __()

- Convert static $modelLabel/$pluralModelLabel/$title to getter methods
- Wrap ->label()/->placeholder()/->helperText()/->description()/->title()/->body() args
- Wrap Section::make()/Fieldset::make()/Notification::make()->title() args
- Fix RelationManagers::getTitle() signature to match parent (Model, string)
- Fix Pages::getTitle() to instance method (BasePage::getTitle is non-static)
- Extend lang/ru.json + lang/en.json with 700+ common terms; identity fallback for the rest
- Remove duplicate getters in 5 resources that had manual getModelLabel already

All 306 tests pass. Missing translations fall back to the RO key so the UI never breaks.

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

app/Filament/Central/Widgets/PendingPayments.php

@@ -17,7 +17,7 @@ class PendingPayments extends BaseWidget
     public function table(Table $table): Table
     {
         return $table
-            ->heading('Facturi pending / overdue')
+            ->heading(__('Facturi pending / overdue'))
             ->query(
                 Subscription::query()
                     ->whereIn('status', ['pending', 'overdue'])
@@ -27,10 +27,10 @@ class PendingPayments extends BaseWidget
             )
             ->columns([
                 Tables\Columns\TextColumn::make('invoice_number')
-                    ->label('Factură')
+                    ->label(__('Factură'))
                     ->copyable()
                     ->url(fn ($record) => SubscriptionResource::getUrl('edit', ['record' => $record])),
-                Tables\Columns\TextColumn::make('company.name')->label('Companie'),
+                Tables\Columns\TextColumn::make('company.name')->label(__('Companie')),
                 Tables\Columns\TextColumn::make('plan.name')->placeholder('—'),
                 Tables\Columns\TextColumn::make('amount')->money(fn ($record) => $record->currency)->weight('bold'),
                 Tables\Columns\TextColumn::make('status')
@@ -38,11 +38,11 @@ class PendingPayments extends BaseWidget
                     ->color(fn ($s) => $s === 'overdue' ? 'danger' : 'warning')
                     ->formatStateUsing(fn ($s) => Subscription::STATUSES[$s] ?? $s),
                 Tables\Columns\TextColumn::make('due_at')
-                    ->label('Scadent')
+                    ->label(__('Scadent'))
                     ->dateTime()
                     ->color(fn ($record) => $record->due_at && $record->due_at->isPast() ? 'danger' : null),
             ])
-            ->emptyStateHeading('🎉 Toate facturile sunt plătite')
+            ->emptyStateHeading(__('🎉 Toate facturile sunt plătite'))
             ->paginated(false);
     }
 }

app/Filament/Central/Widgets/PlatformStats.php

@@ -39,7 +39,7 @@ class PlatformStats extends BaseWidget
                 ->color('primary')
                 ->url(\App\Filament\Central\Resources\CompanyResource::getUrl('index')),
             Stat::make('Active', $active)
-                ->description("✓ Pe abonament plătit")
+                ->description(__("✓ Pe abonament plătit"))
                 ->descriptionIcon('heroicon-m-check-circle')
                 ->color('success'),
             Stat::make('În trial', $trial)
@@ -51,7 +51,7 @@ class PlatformStats extends BaseWidget
                 ->descriptionIcon('heroicon-m-exclamation-triangle')
                 ->color($expiring > 0 ? 'danger' : 'success'),
             Stat::make('Venit luna curentă', number_format($mrr, 0, ',', ' ') . ' MDL')
-                ->description('MRR realizat')
+                ->description(__('MRR realizat'))
                 ->descriptionIcon('heroicon-m-banknotes')
                 ->color('success'),
             Stat::make('Facturi neplătite', $overdue)

app/Filament/Central/Widgets/RecentTenants.php

@@ -17,7 +17,7 @@ class RecentTenants extends BaseWidget
     public function table(Table $table): Table
     {
         return $table
-            ->heading('Tenants recenți')
+            ->heading(__('Tenants recenți'))
             ->query(Company::query()->latest()->limit(8))
             ->columns([
                 Tables\Columns\TextColumn::make('slug')
@@ -33,8 +33,8 @@ class RecentTenants extends BaseWidget
                         default => 'gray',
                     }),
                 Tables\Columns\TextColumn::make('plan.name')->placeholder('—'),
-                Tables\Columns\TextColumn::make('users_count')->counts('users')->label('Useri'),
-                Tables\Columns\TextColumn::make('created_at')->label('Creat')->since(),
+                Tables\Columns\TextColumn::make('users_count')->counts('users')->label(__('Useri')),
+                Tables\Columns\TextColumn::make('created_at')->label(__('Creat'))->since(),
             ])
             ->paginated(false);
     }