feat: 添加输入框编辑索引管理，优化输入文本分发逻辑

AGENTS.md

@@ -40,7 +40,7 @@ Git 历史采用 Conventional Commits，且摘要多为中文，例如 `feat:
 <claude-mem-context>
 # Memory Context
 
-# $CMEM mp-xieyingeng 2026-05-13 8:06am GMT+8
+# $CMEM mp-xieyingeng 2026-05-13 8:12am GMT+8
 
 Legend: 🎯session 🔴bugfix 🟣feature 🔄refactor ✅change 🔵discovery ⚖️decision
 Format: ID TIME TYPE TITLE

assets/prefabs/PageLevel.ts

@@ -234,6 +234,9 @@ export class PageLevel extends BaseView {
     /** 最近一次自动提交的答案，避免填满后重复提交同一内容 */
     private _lastAutoSubmittedAnswer: string = '';
 
+    /** 当前正在编辑的输入格索引 */
+    private _editingInputIndex: number = -1;
+
     /** 倒计时剩余秒数 */
     private _countdown: number = 60;
 
@@ -659,28 +662,13 @@ export class PageLevel extends BaseView {
 
     // ========== EditBox 事件回调 ==========
 
-    /**
-     * 输入框开始编辑时，把当前所有格子的内容合并到当前输入框里
-     */
     private onInputEditingBegan(editBox: EditBox): void {
         if (this._isSyncingInputText) return;
 
         const inputIndex = this._inputNodes.findIndex(node => node === editBox.node);
         if (inputIndex < 0) return;
 
-        const answer = this.getAnswer();
-        this._isSyncingInputText = true;
-
-        try {
-            for (let i = 0; i < this._inputNodes.length; i++) {
-                const itemEditBox = this._inputNodes[i].getComponent(EditBox);
-                if (itemEditBox) {
-                    itemEditBox.string = i === inputIndex ? answer : '';
-                }
-            }
-        } finally {
-            this._isSyncingInputText = false;
-        }
+        this._editingInputIndex = inputIndex;
     }
 
     /**
@@ -696,22 +684,48 @@ export class PageLevel extends BaseView {
     private onInputEditingEnded(editBox: EditBox): void {
         if (this._isSyncingInputText) return;
 
-        const inputIndex = this._inputNodes.findIndex(node => node === editBox.node);
+        const inputIndex = this._editingInputIndex >= 0
+            ? this._editingInputIndex
+            : this._inputNodes.findIndex(node => node === editBox.node);
         if (inputIndex < 0) return;
 
-        this.distributeInputText(editBox.string);
+        this.applyInputTextToBlocks(editBox.string, inputIndex);
+        this._editingInputIndex = -1;
         this.tryAutoSubmitAnswer();
     }
 
-    private distributeInputText(text: string): void {
-        const chars = Array.from(text);
+    private applyInputTextToBlocks(text: string, inputIndex: number): void {
+        const chars = Array.from(text.trim());
+        if (chars.length <= 1) {
+            this.setInputBlockText(inputIndex, chars[0] ?? '');
+            return;
+        }
+
+        this.distributeInputText(text, inputIndex);
+    }
+
+    private setInputBlockText(index: number, text: string): void {
+        const editBox = this._inputNodes[index]?.getComponent(EditBox);
+        if (!editBox) return;
+
+        this._isSyncingInputText = true;
+        try {
+            editBox.string = Array.from(text.trim())[0] ?? '';
+        } finally {
+            this._isSyncingInputText = false;
+        }
+    }
+
+    private distributeInputText(text: string, startIndex: number = 0): void {
+        const chars = Array.from(text.trim());
+        const safeStartIndex = Math.max(0, Math.min(startIndex, this._inputNodes.length - 1));
         this._isSyncingInputText = true;
 
         try {
-            for (let i = 0; i < this._inputNodes.length; i++) {
+            for (let i = safeStartIndex; i < this._inputNodes.length; i++) {
                 const editBox = this._inputNodes[i].getComponent(EditBox);
                 if (editBox) {
-                    editBox.string = chars[i] ?? '';
+                    editBox.string = chars[i - safeStartIndex] ?? '';
                 }
             }
         } finally {
@@ -752,6 +766,10 @@ export class PageLevel extends BaseView {
         this.onSubmitAnswer();
     }
 
+    private normalizeAnswerForCompare(answer: string): string {
+        return answer.trim().toLocaleLowerCase();
+    }
+
     // ========== IconSetting 按钮相关 ==========
 
     /**
@@ -1741,7 +1759,7 @@ export class PageLevel extends BaseView {
         const userAnswer = this.getAnswer();
         console.log(`[PageLevel] 提交答案: ${userAnswer}, 正确答案: ${this._currentConfig.answer}`);
 
-        if (userAnswer === this._currentConfig.answer) {
+        if (this.normalizeAnswerForCompare(userAnswer) === this.normalizeAnswerForCompare(this._currentConfig.answer)) {
             if (this._isShareMode) {
                 this._recordCurrentShareSubmission(userAnswer);
             }