build: add eslint with angular-eslint and typescript-eslint

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QwNRDG9WaKM3Bb9WJddFzx

eslint.config.mjs

@@ -0,0 +1,33 @@
+// @ts-check
+import eslint from '@eslint/js';
+import { defineConfig } from 'eslint/config';
+import tseslint from 'typescript-eslint';
+import angular from 'angular-eslint';
+
+export default defineConfig([
+    { ignores: ['dist', '.angular', 'pocketbase'] },
+    {
+        files: ['**/*.ts'],
+        extends: [
+            eslint.configs.recommended,
+            tseslint.configs.recommended,
+            tseslint.configs.stylistic,
+            angular.configs.tsRecommended,
+        ],
+        processor: angular.processInlineTemplates,
+        rules: {
+            '@angular-eslint/directive-selector': [
+                'error',
+                { type: 'attribute', prefix: 'app', style: 'camelCase' },
+            ],
+            '@angular-eslint/component-selector': [
+                'error',
+                { type: 'element', prefix: 'app', style: 'kebab-case' },
+            ],
+        },
+    },
+    {
+        files: ['**/*.html'],
+        extends: [angular.configs.templateRecommended, angular.configs.templateAccessibility],
+    },
+]);