fix: improved JSON validation for comments and placeholders

src/componets/content/ConfigTemplate.tsx

@@ -40,14 +40,56 @@ export function ConfigTemplateEditor({ config, onSaved }: ConfigTemplateEditorPr
         setJsonError(null);
         return true;
       }
-      
-      // Strip comments (// single-line and /* */ multi-line) and placeholders
-      const sanitizedValue = value
-        .replace(/\/\*[\s\S]*?\*\//g, '')  // Remove /* */ comments
-        .replace(/\/\/.*$/gm, '')          // Remove // comments
-        .replace(/@[^@]+@/g, '1');         // Replace placeholders
-      
-      JSON.parse(sanitizedValue);
+
+      // Step 1: Remove /* */ multi-line comments (safe, can't appear in strings)
+      let sanitized = value.replace(/\/\*[\s\S]*?\*\//g, '');
+
+      // Step 2: Process line by line to handle // comments and placeholders
+      // Only remove // comments that are OUTSIDE of quoted strings
+      const lines = sanitized.split('\n');
+      const processedLines = lines.map(line => {
+        // Find // that's outside quotes
+        // Strategy: split by quotes, only process odd-indexed segments (outside quotes)
+        let result = '';
+        let inQuote = false;
+        let quoteChar = '';
+        
+        for (let i = 0; i < line.length; i++) {
+          const char = line[i];
+          const prevChar = i > 0 ? line[i - 1] : '';
+          
+          // Check for quote start/end (not escaped)
+          if ((char === '"' || char === "'") && prevChar !== '\\') {
+            if (!inQuote) {
+              inQuote = true;
+              quoteChar = char;
+            } else if (char === quoteChar) {
+              inQuote = false;
+              quoteChar = '';
+            }
+            result += char;
+          }
+          // Check for // comment start (only outside quotes)
+          else if (!inQuote && char === '/' && line[i + 1] === '/') {
+            // Rest of line is comment, stop processing
+            break;
+          }
+          else {
+            result += char;
+          }
+        }
+        
+        return result;
+      });
+
+      sanitized = processedLines.join('\n');
+
+      // Step 3: Replace unquoted @placeholders@ with dummy values
+      // Placeholders in JSON values are typically quoted: "@param@"
+      // We replace all @param@ with 1 (works for both quoted and unquoted)
+      sanitized = sanitized.replace(/@[^@]+@/g, '1');
+
+      JSON.parse(sanitized);
       setJsonError(null);
       return true;
     } catch (e) {