diff --git a/app/bootstrap/app.php b/app/bootstrap/app.php
index 1ad2dd6b..f4e0d7d2 100644
--- a/app/bootstrap/app.php
+++ b/app/bootstrap/app.php
@@ -2,9 +2,12 @@
 
 use App\Http\Middleware\EnsureSaasAdmin;
 use App\Http\Middleware\SetTenantContext;
+use Illuminate\Database\QueryException;
 use Illuminate\Foundation\Application;
 use Illuminate\Foundation\Configuration\Exceptions;
 use Illuminate\Foundation\Configuration\Middleware;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Log;
 
 return Application::configure(basePath: dirname(__DIR__))
     ->withRouting(
@@ -30,5 +33,18 @@ return Application::configure(basePath: dirname(__DIR__))
         ]);
     })
     ->withExceptions(function (Exceptions $exceptions): void {
-        //
+        $exceptions->render(function (QueryException $e, Request $request) {
+            Log::error('db.query_exception', [
+                'message' => $e->getMessage(),
+                'sql' => $e->getSql(),
+                'path' => $request->path(),
+            ]);
+            if ($request->expectsJson()) {
+                return response()->json([
+                    'message' => 'Не удалось сохранить. Проверьте данные или попробуйте ещё раз.',
+                ], 422);
+            }
+
+            return null; // default render for non-JSON
+        });
     })->create();
diff --git a/app/phpstan-baseline.neon b/app/phpstan-baseline.neon
index 4b541d69..e3356923 100644
--- a/app/phpstan-baseline.neon
+++ b/app/phpstan-baseline.neon
@@ -258,6 +258,90 @@ parameters:
 			count: 1
 			path: app/Services/Supplier/SupplierProjectGrouping.php
 
+		-
+			message: '#^Class NunoMaduro\\PhpInsights\\Domain\\Insights\\ForbiddenDefineFunctions not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class NunoMaduro\\PhpInsights\\Domain\\Insights\\ForbiddenFinalClasses not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class NunoMaduro\\PhpInsights\\Domain\\Insights\\ForbiddenNormalClasses not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class NunoMaduro\\PhpInsights\\Domain\\Insights\\ForbiddenPrivateMethods not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class NunoMaduro\\PhpInsights\\Domain\\Insights\\ForbiddenTraits not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class NunoMaduro\\PhpInsights\\Domain\\Insights\\SyntaxCheck not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class NunoMaduro\\PhpInsights\\Domain\\Metrics\\Architecture\\Classes not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class SlevomatCodingStandard\\Sniffs\\Commenting\\UselessFunctionDocCommentSniff not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class SlevomatCodingStandard\\Sniffs\\Namespaces\\AlphabeticallySortedUsesSniff not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class SlevomatCodingStandard\\Sniffs\\TypeHints\\DeclareStrictTypesSniff not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class SlevomatCodingStandard\\Sniffs\\TypeHints\\DisallowMixedTypeHintSniff not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class SlevomatCodingStandard\\Sniffs\\TypeHints\\ParameterTypeHintSniff not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class SlevomatCodingStandard\\Sniffs\\TypeHints\\PropertyTypeHintSniff not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
+		-
+			message: '#^Class SlevomatCodingStandard\\Sniffs\\TypeHints\\ReturnTypeHintSniff not found\.$#'
+			identifier: class.notFound
+			count: 1
+			path: config/insights.php
+
 		-
 			message: '#^Return type \(array\<string, mixed\>\) of method Database\\Factories\\BalanceTransactionFactory\:\:definition\(\) should be compatible with return type \(array\<model property of App\\Models\\BalanceTransaction, mixed\>\) of method Illuminate\\Database\\Eloquent\\Factories\\Factory\<App\\Models\\BalanceTransaction\>\:\:definition\(\)$#'
 			identifier: method.childReturnType
@@ -1572,6 +1656,12 @@ parameters:
 			count: 14
 			path: tests/Feature/Plan5/Projects/ProjectsUpdateTest.php
 
+		-
+			message: '#^Call to an undefined method Pest\\PendingCalls\\TestCall\:\:getJson\(\)\.$#'
+			identifier: method.notFound
+			count: 1
+			path: tests/Feature/Project/QueryExceptionRenderTest.php
+
 		-
 			message: '#^Access to an undefined property Pest\\PendingCalls\\TestCall\:\:\$tenant\.$#'
 			identifier: property.notFound
diff --git a/app/tests/Feature/Project/QueryExceptionRenderTest.php b/app/tests/Feature/Project/QueryExceptionRenderTest.php
new file mode 100644
index 00000000..b88c45f0
--- /dev/null
+++ b/app/tests/Feature/Project/QueryExceptionRenderTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\QueryException;
+use Illuminate\Support\Facades\Route;
+
+it('renders QueryException as human JSON message, not SQLSTATE', function () {
+    Route::get('/_test/boom-query', function () {
+        throw new QueryException('pgsql', 'SELECT 1', [], new Exception('SQLSTATE[23505] duplicate key'));
+    });
+
+    $res = $this->getJson('/_test/boom-query');
+    $res->assertStatus(422);
+    expect($res->json('message'))->not->toContain('SQLSTATE');
+    expect($res->json('message'))->toContain('Не удалось');
+});