fix: use One Dark theme for CodeMirror syntax highlighting

- Replace custom highlight styles with @codemirror/theme-one-dark
- Cleaner implementation with official CodeMirror theme
- Keep custom font and padding overrides

package-lock.json

@@ -14,6 +14,7 @@
 				"@codemirror/lang-css": "^6.3.1",
 				"@codemirror/lang-html": "^6.4.11",
 				"@codemirror/state": "^6.5.2",
+				"@codemirror/theme-one-dark": "^6.1.3",
 				"@codemirror/view": "^6.39.4",
 				"@emmetio/codemirror6-plugin": "^0.4.0",
 				"codemirror": "^6.0.2",
@@ -269,6 +270,18 @@
 				"@marijn/find-cluster-break": "^1.0.0"
 			}
 		},
+		"node_modules/@codemirror/theme-one-dark": {
+			"version": "6.1.3",
+			"resolved": "https://registry.npmjs.org/@codemirror/theme-one-dark/-/theme-one-dark-6.1.3.tgz",
+			"integrity": "sha512-NzBdIvEJmx6fjeremiGp3t/okrLPYT0d9orIc7AFun8oZcRk58aejkqhv6spnz4MLAevrKNPMQYXEWMg4s+sKA==",
+			"license": "MIT",
+			"dependencies": {
+				"@codemirror/language": "^6.0.0",
+				"@codemirror/state": "^6.0.0",
+				"@codemirror/view": "^6.0.0",
+				"@lezer/highlight": "^1.0.0"
+			}
+		},
 		"node_modules/@codemirror/view": {
 			"version": "6.39.4",
 			"resolved": "https://registry.npmjs.org/@codemirror/view/-/view-6.39.4.tgz",