feat: AI model selector + i18n nav labels (RU/EN) on new modules

AI model selector:
- AiAssistantService::MODEL_DEFAULTS and MODEL_OPTIONS const tables (3 picks per
  provider: Claude Opus 4.7 / Sonnet 4.6 / Haiku 4.5, OpenAI 4o / 4o-mini,
  Gemini 1.5 Pro / Flash). Default upgraded from Sonnet 4.5 → Sonnet 4.6.
- modelFor(provider, company?) resolves tenant override > global default.
- All 8 hardcoded model strings replaced with modelFor() across callClaude
  (chat with tool-use), callOpenAI, callGemini (chat), postClaude/postOpenAI/
  postGemini (single-shot), and OcrInvoiceService.
- Settings page adds 3 model selectors per provider with persistence at
  settings.ai.models.{claude,gpt,gemini}.

i18n nav labels:
- TireSet / Bodyshop / Subcontractor / SubcontractJob / PricingCoefficient /
  ShopCustomer resources: getNavigationLabel / getNavigationGroup /
  getModelLabel / getPluralModelLabel return __()-wrapped strings.
- 20 keys added to lang/ru.json and lang/en.json.

Tests (4 new): default model, tenant override wins, unknown provider falls
back to claude default, options dictionary contains each default key.

Full suite: 134 passed.

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

app/Filament/Tenant/Pages/Settings.php

@@ -63,6 +63,9 @@ class Settings extends Page
             'ai_claude_key' => $settings['ai']['claude_key'] ?? null,
             'ai_gpt_key' => $settings['ai']['gpt_key'] ?? null,
             'ai_gemini_key' => $settings['ai']['gemini_key'] ?? null,
+            'ai_model_claude' => data_get($settings, 'ai.models.claude', \App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['claude']),
+            'ai_model_gpt' => data_get($settings, 'ai.models.gpt', \App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['gpt']),
+            'ai_model_gemini' => data_get($settings, 'ai.models.gemini', \App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['gemini']),
         ]);
     }
 
@@ -193,8 +196,20 @@ class Settings extends Page
                             ->options(['claude' => 'Claude (Anthropic)', 'gpt' => 'ChatGPT (OpenAI)', 'gemini' => 'Gemini (Google)'])
                             ->default('claude'),
                         Forms\Components\TextInput::make('ai_claude_key')->label('Claude API Key')->password()->revealable()->placeholder('sk-ant-...'),
+                        Forms\Components\Select::make('ai_model_claude')
+                            ->label('Model Claude')
+                            ->options(\App\Services\Ai\AiAssistantService::MODEL_OPTIONS['claude'])
+                            ->default(\App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['claude']),
                         Forms\Components\TextInput::make('ai_gpt_key')->label('OpenAI API Key')->password()->revealable()->placeholder('sk-proj-...'),
+                        Forms\Components\Select::make('ai_model_gpt')
+                            ->label('Model OpenAI')
+                            ->options(\App\Services\Ai\AiAssistantService::MODEL_OPTIONS['gpt'])
+                            ->default(\App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['gpt']),
                         Forms\Components\TextInput::make('ai_gemini_key')->label('Gemini API Key')->password()->revealable(),
+                        Forms\Components\Select::make('ai_model_gemini')
+                            ->label('Model Gemini')
+                            ->options(\App\Services\Ai\AiAssistantService::MODEL_OPTIONS['gemini'])
+                            ->default(\App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['gemini']),
                     ]),
             ])
             ->statePath('data');
@@ -246,6 +261,11 @@ class Settings extends Page
                     'claude_key' => $data['ai_claude_key'] ?? null,
                     'gpt_key' => $data['ai_gpt_key'] ?? null,
                     'gemini_key' => $data['ai_gemini_key'] ?? null,
+                    'models' => [
+                        'claude' => $data['ai_model_claude'] ?? \App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['claude'],
+                        'gpt' => $data['ai_model_gpt'] ?? \App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['gpt'],
+                        'gemini' => $data['ai_model_gemini'] ?? \App\Services\Ai\AiAssistantService::MODEL_DEFAULTS['gemini'],
+                    ],
                 ],
             ]),
         ]);

app/Filament/Tenant/Resources/BodyshopJobResource.php

@@ -134,6 +134,27 @@ class BodyshopJobResource extends Resource
         ];
     }
 
+
+    public static function getNavigationLabel(): string
+    {
+        return __('Tinichigerie / Detailing');
+    }
+
+    public static function getNavigationGroup(): ?string
+    {
+        return __('Tinichigerie');
+    }
+
+    public static function getModelLabel(): string
+    {
+        return __('lucrare caroserie');
+    }
+
+    public static function getPluralModelLabel(): string
+    {
+        return __('lucrări caroserie');
+    }
+
     public static function getPages(): array
     {
         return [

app/Filament/Tenant/Resources/PricingCoefficientResource.php

@@ -97,6 +97,27 @@ class PricingCoefficientResource extends Resource
             ->defaultSort('priority');
     }
 
+
+    public static function getNavigationLabel(): string
+    {
+        return __('Coeficienți preț');
+    }
+
+    public static function getNavigationGroup(): ?string
+    {
+        return __('Depozit');
+    }
+
+    public static function getModelLabel(): string
+    {
+        return __('coeficient');
+    }
+
+    public static function getPluralModelLabel(): string
+    {
+        return __('coeficienți preț');
+    }
+
     public static function getPages(): array
     {
         return [

app/Filament/Tenant/Resources/ShopCustomerResource.php

@@ -93,6 +93,27 @@ class ShopCustomerResource extends Resource
         ];
     }
 
+
+    public static function getNavigationLabel(): string
+    {
+        return __('Clienți magazin');
+    }
+
+    public static function getNavigationGroup(): ?string
+    {
+        return __('Magazin');
+    }
+
+    public static function getModelLabel(): string
+    {
+        return __('client magazin');
+    }
+
+    public static function getPluralModelLabel(): string
+    {
+        return __('clienți magazin');
+    }
+
     public static function getPages(): array
     {
         return [

app/Filament/Tenant/Resources/SubcontractJobResource.php

@@ -122,6 +122,27 @@ class SubcontractJobResource extends Resource
             ->defaultSort('created_at', 'desc');
     }
 
+
+    public static function getNavigationLabel(): string
+    {
+        return __('Lucrări terți');
+    }
+
+    public static function getNavigationGroup(): ?string
+    {
+        return __('Subcontractare');
+    }
+
+    public static function getModelLabel(): string
+    {
+        return __('lucrare terți');
+    }
+
+    public static function getPluralModelLabel(): string
+    {
+        return __('lucrări terți');
+    }
+
     public static function getPages(): array
     {
         return [

app/Filament/Tenant/Resources/SubcontractorResource.php

@@ -73,6 +73,27 @@ class SubcontractorResource extends Resource
             ->defaultSort('name');
     }
 
+
+    public static function getNavigationLabel(): string
+    {
+        return __('Subcontractori');
+    }
+
+    public static function getNavigationGroup(): ?string
+    {
+        return __('Subcontractare');
+    }
+
+    public static function getModelLabel(): string
+    {
+        return __('subcontractor');
+    }
+
+    public static function getPluralModelLabel(): string
+    {
+        return __('subcontractori');
+    }
+
     public static function getPages(): array
     {
         return [

app/Filament/Tenant/Resources/TireSetResource.php

@@ -185,6 +185,27 @@ class TireSetResource extends Resource
         ];
     }
 
+
+    public static function getNavigationLabel(): string
+    {
+        return __('Seturi anvelope');
+    }
+
+    public static function getNavigationGroup(): ?string
+    {
+        return __('Anvelope');
+    }
+
+    public static function getModelLabel(): string
+    {
+        return __('set anvelope');
+    }
+
+    public static function getPluralModelLabel(): string
+    {
+        return __('seturi anvelope');
+    }
+
     public static function getPages(): array
     {
         return [

app/Services/Ai/AiAssistantService.php

@@ -21,6 +21,37 @@ use Illuminate\Support\Facades\Http;
  */
 class AiAssistantService
 {
+    /** Per-provider default model + the dropdown options exposed in Settings. */
+    public const MODEL_DEFAULTS = [
+        'claude' => 'claude-sonnet-4-6',
+        'gpt' => 'gpt-4o-mini',
+        'gemini' => 'gemini-1.5-flash',
+    ];
+
+    public const MODEL_OPTIONS = [
+        'claude' => [
+            'claude-opus-4-7' => 'Opus 4.7 — cel mai capabil',
+            'claude-sonnet-4-6' => 'Sonnet 4.6 — echilibrat (recomandat)',
+            'claude-haiku-4-5-20251001' => 'Haiku 4.5 — rapid și ieftin',
+        ],
+        'gpt' => [
+            'gpt-4o' => 'GPT-4o',
+            'gpt-4o-mini' => 'GPT-4o mini (recomandat)',
+        ],
+        'gemini' => [
+            'gemini-1.5-pro' => 'Gemini 1.5 Pro',
+            'gemini-1.5-flash' => 'Gemini 1.5 Flash (recomandat)',
+        ],
+    ];
+
+    /** Resolve the model id for a provider — tenant override > global default. */
+    public function modelFor(string $provider, ?Company $company = null): string
+    {
+        $company ??= $this->currentCompany();
+        $override = $company ? data_get($company->settings, "ai.models.{$provider}") : null;
+        return $override ?: (self::MODEL_DEFAULTS[$provider] ?? 'claude-sonnet-4-6');
+    }
+
     public function ask(AiChat $chat, string $userMessage): AiMessage
     {
         // Persist user message.
@@ -148,7 +179,7 @@ TXT;
             $r = Http::withHeaders($headers)->timeout(60)->post(
                 'https://api.anthropic.com/v1/messages',
                 [
-                    'model' => 'claude-sonnet-4-5',
+                    'model' => $this->modelFor('claude', $company),
                     'max_tokens' => 1024,
                     'system' => $system,
                     'tools' => $tools,
@@ -214,7 +245,7 @@ TXT;
         $r = Http::withHeaders(['Authorization' => 'Bearer ' . $key, 'content-type' => 'application/json'])
             ->timeout(60)
             ->post('https://api.openai.com/v1/chat/completions', [
-                'model' => 'gpt-4o-mini',
+                'model' => $this->modelFor('gpt', $company),
                 'messages' => $messages,
                 'max_tokens' => 1024,
             ]);
@@ -390,7 +421,7 @@ TXT;
             ])
             ->timeout(60)
             ->post('https://api.anthropic.com/v1/messages', [
-                'model' => 'claude-sonnet-4-5',
+                'model' => $this->modelFor('claude'),
                 'max_tokens' => 1024,
                 'system' => $system,
                 'messages' => $messages,
@@ -413,7 +444,7 @@ TXT;
         $r = Http::withHeaders(['Authorization' => 'Bearer ' . $key, 'content-type' => 'application/json'])
             ->timeout(60)
             ->post('https://api.openai.com/v1/chat/completions', [
-                'model' => 'gpt-4o-mini',
+                'model' => $this->modelFor('gpt'),
                 'messages' => array_merge([['role' => 'system', 'content' => $system]], $messages),
                 'max_tokens' => 1024,
             ]);
@@ -442,7 +473,7 @@ TXT;
         }
         $r = Http::withHeaders(['content-type' => 'application/json'])
             ->timeout(60)
-            ->post('https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash:generateContent?key=' . $key, [
+            ->post('https://generativelanguage.googleapis.com/v1beta/models/' . $this->modelFor('gemini') . ':generateContent?key=' . $key, [
                 'systemInstruction' => ['parts' => [['text' => $system]]],
                 'contents' => $contents,
                 'generationConfig' => ['maxOutputTokens' => 1024],
@@ -452,7 +483,7 @@ TXT;
         }
         $body = $r->json();
         $text = $body['candidates'][0]['content']['parts'][0]['text'] ?? '(răspuns gol)';
-        return [$text, ['model' => 'gemini-1.5-flash', 'tokens' => $body['usageMetadata'] ?? null]];
+        return [$text, ['model' => $this->modelFor('gemini'), 'tokens' => $body['usageMetadata'] ?? null]];
     }
 
     protected function currentCompany(): ?Company
@@ -474,7 +505,7 @@ TXT;
 
         $r = Http::withHeaders(['content-type' => 'application/json'])
             ->timeout(60)
-            ->post('https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash:generateContent?key=' . $key, [
+            ->post('https://generativelanguage.googleapis.com/v1beta/models/' . $this->modelFor('gemini', $company) . ':generateContent?key=' . $key, [
                 'systemInstruction' => ['parts' => [['text' => $this->buildSystemPrompt($company)]]],
                 'contents' => $contents,
                 'generationConfig' => ['maxOutputTokens' => 1024],
@@ -486,7 +517,7 @@ TXT;
         $body = $r->json();
         $text = $body['candidates'][0]['content']['parts'][0]['text'] ?? '(răspuns gol)';
         return [$text, [
-            'model' => 'gemini-1.5-flash',
+            'model' => $this->modelFor('gemini', $company),
             'tokens' => $body['usageMetadata'] ?? null,
         ]];
     }

app/Services/Ai/OcrInvoiceService.php

@@ -52,7 +52,7 @@ class OcrInvoiceService
             ])
             ->timeout(60)
             ->post('https://api.anthropic.com/v1/messages', [
-                'model' => 'claude-sonnet-4-5',
+                'model' => app(AiAssistantService::class)->modelFor('claude', $company),
                 'max_tokens' => 2048,
                 'system' => $this->systemPrompt(),
                 'messages' => [[

lang/en.json

@@ -21,7 +21,6 @@
     "Status": "Status",
     "Actions": "Actions",
     "Notifications": "Notifications",
-
     "Clienți": "Clients",
     "Mașini": "Vehicles",
     "Cereri": "Leads",
@@ -53,5 +52,25 @@
     "Jurnal": "Audit log",
     "Telefonie": "Calls",
     "Finanțe": "Finance",
-    "Site PSauto": "Public site"
+    "Site PSauto": "Public site",
+    "Seturi anvelope": "Tire sets",
+    "Anvelope": "Tires",
+    "set anvelope": "tire set",
+    "seturi anvelope": "tire sets",
+    "Tinichigerie / Detailing": "Body / Detailing",
+    "Tinichigerie": "Body shop",
+    "lucrare caroserie": "body job",
+    "lucrări caroserie": "body jobs",
+    "Subcontractori": "Subcontractors",
+    "Subcontractare": "Subcontracting",
+    "subcontractor": "subcontractor",
+    "Lucrări terți": "Outsourced jobs",
+    "lucrare terți": "outsourced job",
+    "lucrări terți": "outsourced jobs",
+    "Coeficienți preț": "Pricing coefficients",
+    "coeficient": "coefficient",
+    "Magazin": "Shop",
+    "Clienți magazin": "Shop customers",
+    "client magazin": "shop customer",
+    "clienți magazin": "shop customers"
 }

lang/ru.json

@@ -21,7 +21,6 @@
     "Status": "Статус",
     "Actions": "Действия",
     "Notifications": "Уведомления",
-
     "Clienți": "Клиенты",
     "Mașini": "Машины",
     "Cereri": "Заявки",
@@ -53,5 +52,25 @@
     "Jurnal": "Журнал",
     "Telefonie": "Телефония",
     "Finanțe": "Финансы",
-    "Site PSauto": "Сайт"
+    "Site PSauto": "Сайт",
+    "Seturi anvelope": "Шины (комплекты)",
+    "Anvelope": "Шины",
+    "set anvelope": "комплект шин",
+    "seturi anvelope": "комплекты шин",
+    "Tinichigerie / Detailing": "Кузов / Детейлинг",
+    "Tinichigerie": "Кузовной цех",
+    "lucrare caroserie": "кузовная работа",
+    "lucrări caroserie": "кузовные работы",
+    "Subcontractori": "Субподрядчики",
+    "Subcontractare": "Субподряд",
+    "subcontractor": "субподрядчик",
+    "Lucrări terți": "Работы у третьих лиц",
+    "lucrare terți": "работа у третьих лиц",
+    "lucrări terți": "работы у третьих лиц",
+    "Coeficienți preț": "Ценовые коэффициенты",
+    "coeficient": "коэффициент",
+    "Magazin": "Магазин",
+    "Clienți magazin": "Клиенты магазина",
+    "client magazin": "клиент магазина",
+    "clienți magazin": "клиенты магазина"
 }

tests/Feature/AiModelSelectorTest.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Central\Company;
+use App\Models\Central\Plan;
+use App\Services\Ai\AiAssistantService;
+use App\Tenancy\TenantManager;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AiModelSelectorTest extends TestCase
+{
+    use RefreshDatabase;
+
+    public function test_default_model_when_no_override(): void
+    {
+        $svc = app(AiAssistantService::class);
+        $company = $this->makeCompany(['ai' => ['claude_key' => 'sk']]);
+
+        $this->assertEquals('claude-sonnet-4-6', $svc->modelFor('claude', $company));
+        $this->assertEquals('gpt-4o-mini', $svc->modelFor('gpt', $company));
+        $this->assertEquals('gemini-1.5-flash', $svc->modelFor('gemini', $company));
+    }
+
+    public function test_tenant_override_wins(): void
+    {
+        $svc = app(AiAssistantService::class);
+        $company = $this->makeCompany([
+            'ai' => [
+                'claude_key' => 'sk',
+                'models' => [
+                    'claude' => 'claude-opus-4-7',
+                    'gpt' => 'gpt-4o',
+                ],
+            ],
+        ]);
+
+        $this->assertEquals('claude-opus-4-7', $svc->modelFor('claude', $company));
+        $this->assertEquals('gpt-4o', $svc->modelFor('gpt', $company));
+        // Provider without override → default.
+        $this->assertEquals('gemini-1.5-flash', $svc->modelFor('gemini', $company));
+    }
+
+    public function test_unknown_provider_falls_back(): void
+    {
+        $svc = app(AiAssistantService::class);
+        $company = $this->makeCompany([]);
+        $this->assertEquals('claude-sonnet-4-6', $svc->modelFor('xyz', $company));
+    }
+
+    public function test_options_dictionary_keys_match_defaults(): void
+    {
+        foreach (AiAssistantService::MODEL_DEFAULTS as $provider => $default) {
+            $this->assertArrayHasKey(
+                $default,
+                AiAssistantService::MODEL_OPTIONS[$provider],
+                "default '$default' for $provider is not in MODEL_OPTIONS"
+            );
+        }
+    }
+
+    private function makeCompany(array $settings): Company
+    {
+        $plan = Plan::firstOrCreate(['slug' => 'test'], ['name' => 'T', 'price' => 0, 'features' => []]);
+        $company = Company::create([
+            'plan_id' => $plan->id, 'slug' => 'mdl-' . uniqid(),
+            'name' => 'Model Co', 'status' => 'active', 'settings' => $settings,
+        ]);
+        app(TenantManager::class)->setCurrent($company);
+        return $company;
+    }
+}