fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

src/Framework/Display/Themes/DefaultHtmlThemes.php

@@ -0,0 +1,94 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Display\Themes;
+
+/**
+ * Factory for creating default HTML themes
+ */
+final readonly class DefaultHtmlThemes
+{
+    public static function default(): HtmlTheme
+    {
+        return new HtmlTheme(
+            themeClass: 'display-theme-default',
+        );
+    }
+
+    public static function dark(): HtmlTheme
+    {
+        return new HtmlTheme(
+            keyClass: 'display-key-dark',
+            valueClass: 'display-value-dark',
+            stringClass: 'display-string-dark',
+            numberClass: 'display-number-dark',
+            booleanClass: 'display-boolean-dark',
+            nullClass: 'display-null-dark',
+            typeClass: 'display-type-dark',
+            classNameClass: 'display-class-name-dark',
+            errorClass: 'display-error-dark',
+            warningClass: 'display-warning-dark',
+            infoClass: 'display-info-dark',
+            circularReferenceClass: 'display-circular-reference-dark',
+            collectionClass: 'display-collection-dark',
+            summaryClass: 'display-summary-dark',
+            arrayBracketClass: 'display-array-bracket-dark',
+            objectBracketClass: 'display-object-bracket-dark',
+            separatorClass: 'display-separator-dark',
+            metadataClass: 'display-metadata-dark',
+            themeClass: 'display-theme-dark',
+        );
+    }
+
+    public static function light(): HtmlTheme
+    {
+        return new HtmlTheme(
+            keyClass: 'display-key-light',
+            valueClass: 'display-value-light',
+            stringClass: 'display-string-light',
+            numberClass: 'display-number-light',
+            booleanClass: 'display-boolean-light',
+            nullClass: 'display-null-light',
+            typeClass: 'display-type-light',
+            classNameClass: 'display-class-name-light',
+            errorClass: 'display-error-light',
+            warningClass: 'display-warning-light',
+            infoClass: 'display-info-light',
+            circularReferenceClass: 'display-circular-reference-light',
+            collectionClass: 'display-collection-light',
+            summaryClass: 'display-summary-light',
+            arrayBracketClass: 'display-array-bracket-light',
+            objectBracketClass: 'display-object-bracket-light',
+            separatorClass: 'display-separator-light',
+            metadataClass: 'display-metadata-light',
+            themeClass: 'display-theme-light',
+        );
+    }
+
+    public static function colorful(): HtmlTheme
+    {
+        return new HtmlTheme(
+            keyClass: 'display-key-colorful',
+            valueClass: 'display-value-colorful',
+            stringClass: 'display-string-colorful',
+            numberClass: 'display-number-colorful',
+            booleanClass: 'display-boolean-colorful',
+            nullClass: 'display-null-colorful',
+            typeClass: 'display-type-colorful',
+            classNameClass: 'display-class-name-colorful',
+            errorClass: 'display-error-colorful',
+            warningClass: 'display-warning-colorful',
+            infoClass: 'display-info-colorful',
+            circularReferenceClass: 'display-circular-reference-colorful',
+            collectionClass: 'display-collection-colorful',
+            summaryClass: 'display-summary-colorful',
+            arrayBracketClass: 'display-array-bracket-colorful',
+            objectBracketClass: 'display-object-bracket-colorful',
+            separatorClass: 'display-separator-colorful',
+            metadataClass: 'display-metadata-colorful',
+            themeClass: 'display-theme-colorful',
+        );
+    }
+}
+