Improve state v2 parsing and errors

modules/variables/state2/executor.js

@@ -261,9 +261,23 @@ function popVar(path, value) {
  * =========================
  */
 const EXT_ID = 'LittleWhiteBox';
+const ERR_VAR_NAME = 'LWB_STATE_ERRORS';
 const LOG_KEY = 'stateLogV2';
 const CKPT_KEY = 'stateCkptV2';
 
+
+/**
+ * 写入状态错误到本地变量（覆盖写入）
+ */
+function writeStateErrorsToLocalVar(lines) {
+    try {
+        const text = Array.isArray(lines) && lines.length
+            ? lines.map(s => `- ${String(s)}`).join('\n')
+            : '';
+        setLocalVariable(ERR_VAR_NAME, text);
+    } catch {}
+}
+
 function getLwbExtMeta() {
     const ctx = getContext();
     const meta = ctx?.chatMetadata || (ctx.chatMetadata = {});
@@ -416,6 +430,7 @@ export function applyStateForMessage(messageId, messageContent) {
     // ✅ 统一：只要没有可执行 blocks，就视为本层 state 被移除
     if (!signature || blocks.length === 0) {
         clearStateAppliedFor(messageId);
+        writeStateErrorsToLocalVar([]);
         // delete WAL record
         try {
             const ext = getLwbExtMeta();
@@ -470,10 +485,21 @@ export function applyStateForMessage(messageId, messageContent) {
 
             const guard = validate(op, absPath, op === 'inc' ? delta : value, oldValue);
             if (!guard.allow) {
-                errors.push(`[${path}] 拒绝: ${guard.reason}`);
+                errors.push(`${path}: ${guard.reason || '\u88ab\u89c4\u5219\u62d2\u7edd'}`);
                 continue;
             }
 
+            // 记录修正信息
+            if (guard.note) {
+                if (op === 'inc') {
+                    const raw = Number(delta);
+                    const rawTxt = Number.isFinite(raw) ? `${raw >= 0 ? '+' : ''}${raw}` : String(delta ?? '');
+                    errors.push(`${path}: ${rawTxt} ${guard.note}`);
+                } else {
+                    errors.push(`${path}: ${guard.note}`);
+                }
+            }
+
             let execOk = true;
             let execReason = '';
 
@@ -539,6 +565,9 @@ export function applyStateForMessage(messageId, messageContent) {
     // ✅ checkpoint：执行完该楼后，可选存一次全量
     saveCheckpointIfNeeded(messageId);
 
+    // Write error list to local variable
+    writeStateErrorsToLocalVar(errors);
+
     return { atoms, errors, skipped: false };
 }