feat: 新增租戶品牌客製化系統（Logo、主色系）、修正 hardcoded 顏色為 CSS 變數

routes/landlord.php

@@ -30,4 +30,8 @@ Route::prefix('landlord')->name('landlord.')->middleware(['web', 'auth', \App\Ht
     // 租戶域名管理
     Route::post('tenants/{tenant}/domains', [TenantController::class, 'addDomain'])->name('tenants.domains.store');
     Route::delete('tenants/{tenant}/domains/{domain}', [TenantController::class, 'removeDomain'])->name('tenants.domains.destroy');
+    
+    // 租戶樣式管理
+    Route::get('tenants/{tenant}/branding', [TenantController::class, 'showBranding'])->name('tenants.branding');
+    Route::post('tenants/{tenant}/branding', [TenantController::class, 'updateBranding'])->name('tenants.branding.update');
 });