feat: improve prompts

lib/dashbot/core/utils/safe_parse_json_message.dart

@@ -0,0 +1,30 @@
+import 'dart:convert';
+
+/// Lightweight JSON parser helper to avoid adding dependencies.
+/// Intended for parsing AI agent structured outputs that may be wrapped
+/// in markdown code fences or include extra prose.
+class MessageJson {
+  static Map<String, dynamic> safeParse(String input) {
+    // Try strict JSON first
+    try {
+      return _parseJson(input);
+    } catch (_) {
+      // If input looks like markdown fenced block containing JSON, try to extract
+      final start = input.indexOf('{');
+      final end = input.lastIndexOf('}');
+      if (start != -1 && end != -1 && end > start) {
+        final slice = input.substring(start, end + 1);
+        return _parseJson(slice);
+      }
+      rethrow;
+    }
+  }
+
+  static Map<String, dynamic> _parseJson(String s) {
+    final decoded = jsonDecode(s);
+    if (decoded is Map<String, dynamic>) {
+      return decoded;
+    }
+    return {};
+  }
+}