fix: resolve QG-001 typography token drift and QG-006 style violations

Replace raw line-height values with --leading-none/--leading-loose
design tokens in 3 CSS files. Fix 7 PHP style issues: import ordering,
unused imports, brace placement, multi-line argument formatting.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/Support/ThemeResolutionTest.php

@@ -5,7 +5,6 @@ namespace MintyPHP\Tests\Support;
 use MintyPHP\App\AppContainer;
 use MintyPHP\Service\Settings\SettingCacheService;
 use MintyPHP\Service\Settings\ThemeConfigGateway;
-use MintyPHP\Tests\Support\AppContainerIsolationTrait;
 use PHPUnit\Framework\TestCase;
 
 class ThemeResolutionTest extends TestCase

tests/Unit/Module/LayoutContextProviderTest.php

@@ -77,7 +77,10 @@ final class LayoutContextProviderTest extends TestCase
         // addressbook.nav via the provider loop
         $layoutNav = appBuildLayoutNavContext([], [], []);
 
-        self::assertArrayHasKey('addressbook.nav', $layoutNav,
-            'addressbook.nav key must be present in layoutNav when module is active');
+        self::assertArrayHasKey(
+            'addressbook.nav',
+            $layoutNav,
+            'addressbook.nav key must be present in layoutNav when module is active'
+        );
     }
 }

tests/Unit/Module/SearchProviderCollectionTest.php

@@ -46,8 +46,11 @@ final class SearchProviderCollectionTest extends TestCase
         $coreResources = SearchConfig::resources('test', 'en');
         $coreKeys = array_column($coreResources, 'key');
 
-        self::assertNotContains('address-book', $coreKeys,
-            'address-book must not be in Core search resources (moved to module)');
+        self::assertNotContains(
+            'address-book',
+            $coreKeys,
+            'address-book must not be in Core search resources (moved to module)'
+        );
     }
 
     public function testAddressBookSearchProviderDirectly(): void
@@ -105,16 +108,22 @@ final class SearchProviderCollectionTest extends TestCase
     {
         $moduleResources = SearchConfig::moduleResources();
 
-        self::assertArrayHasKey('address-book', $moduleResources,
-            'address-book resource must come from module provider via SearchConfig');
+        self::assertArrayHasKey(
+            'address-book',
+            $moduleResources,
+            'address-book resource must come from module provider via SearchConfig'
+        );
     }
 
     public function testTenantFilterMergedFromModule(): void
     {
         $filters = SearchConfig::tenantScopeFilters();
 
-        self::assertArrayHasKey('address-book', $filters,
-            'address-book tenant scope filter must be provided by module');
+        self::assertArrayHasKey(
+            'address-book',
+            $filters,
+            'address-book tenant scope filter must be provided by module'
+        );
     }
 
     public function testSearchConfigListUrlDelegatesToModule(): void