工欲善其事，必先利其器：準備更新哈哈倉頡

[ejsoon]

「婧婊」似乎應該調換位置。

[ejsoon]

「縹」是常用字，如「縹渺、縹緲」。

[ejsoon]

「糌」應改為fdho，現在是fdhy。

[ejsoon]

把「垸」調至「埞」前。

[ejsoon]

「秽」仍應放到後面，改成hdun。

[ejsoon]

陨和预一樣也都沒改。

[ejsoon]

發現「氳」是錯碼，應該為onwo，之前為onwk。

[ejsoon]

倾應為opmo

[ejsoon]

躖應改為rmvi

[ejsoon]

躅應置前

[ejsoon]

改進：
當輸入一個單字時，如這個單字的編碼為abcd，則程式會列出「a,ab,abc,abcd」所對應的字。這時如果再輸入「abef」，則之前不要清除，而是加上「abe,abef」。只有點擊finish後才會清除。

「save to undostack」以及「更新比對」等相關受影響的代碼也要進行更改。

需要給出所有更改的地方和所要替換的代碼，不用給出全部代碼。所有的代碼和注釋都要使用英文。

代码： 全选

改進：
當輸入一個單字時，如這個單字的編碼為abcd，則程式會列出「a,ab,abc,abcd」所對應的字。這時如果再輸入「abef」，則之前不要清除，而是加上「abe,abef」。只有點擊finish後才會清除。

「save to undostack」以及「更新比對」等相關受影響的代碼也要進行更改。

需要給出所有更改的地方和所要替換的代碼，不用給出全部代碼。所有的代碼和注釋都要使用英文。

[ejsoon]

改進：
當輸入一個單字時，如這個單字的編碼為abcd，則程式會列出「a,ab,abc,abcd」所對應的字。這時如果再輸入「abef」，則之前不要清除，而是加上「abe,abef」。只有點擊finish（頁面上已有）後才會清除。

「save to undostack」以及「更新比對」等相關受影響的代碼也要進行更改。

需要給出所有更改的地方和所要替換的代碼，不用給出全部代碼。所有的代碼和注釋都要使用英文。

代码： 全选

改進：
當輸入一個單字時，如這個單字的編碼為abcd，則程式會列出「a,ab,abc,abcd」所對應的字。這時如果再輸入「abef」，則之前不要清除，而是加上「abe,abef」。只有點擊finish（頁面上已有）後才會清除。

「save to undostack」以及「更新比對」等相關受影響的代碼也要進行更改。

需要給出所有更改的地方和所要替換的代碼，不用給出全部代碼。所有的代碼和注釋都要使用英文。

gemini pro：

代码： 全选

Here are the required modifications to make the code sequences accumulate correctly without clearing the display until "Finish" is clicked. This also ensures that the undo/redo stack and diffing engine accurately track the cumulative interface state.

Please find the specific functions below and replace the corresponding blocks in your code.

### 1. Update `handleEditSubmit()`

This change stops `activeEditKeys` from resetting on every input. It also wraps `originalSnapshotState` in a condition so that the diffing baseline is preserved across cumulative edits, keeping your comparison highlights intact.

**Replace this block:**

```javascript
        if (isSingleWordMode) {
          activeEditKeys.clear(); // Only show sequences for this code
          for (let i = 1; i <= singleWordActiveCode.length; i++) {
            activeEditKeys.add(singleWordActiveCode.substring(0, i));
          }
          originalSnapshotState = getSystemState();
        } else {

```

**With this code:**

```javascript
        if (isSingleWordMode) {
          // Do not clear activeEditKeys to allow cumulative display
          for (let i = 1; i <= singleWordActiveCode.length; i++) {
            activeEditKeys.add(singleWordActiveCode.substring(0, i));
          }
          // Only initialize the baseline snapshot once per session to maintain diffs
          // across multiple subsequent inputs.
          if (!originalSnapshotState || originalSnapshotState.size === 0) {
            originalSnapshotState = getSystemState();
          }
        } else {

```

---

### 2. Update `saveStateForUndo()`

To ensure the undo system remembers which lines were expanded when an edit occurred, we need to save the current state of `activeEditKeys` into the history stack.

**Replace the entire function with:**

```javascript
      function saveStateForUndo(description = 'Manual Edit') {
        let currentLines = mcc0string.split('\n').filter(l => l.trim() !== '');
        let charDefMapCopy = new Map();
        for (let [k, v] of charDefCodeMap.entries()) {
          charDefMapCopy.set(k, [...v]);
        }
        undoStack.push({
          lines: currentLines,
          filecontent: filecontent,
          charDefCodeMap: charDefMapCopy,
          activeKeys: new Set(activeEditKeys), // Save cumulative keys state
          desc: description
        });
        redoStack = []; // Clear redo stack whenever a new action occurs
        renderActionLogs(); // Update visual logs
      }

```

---

### 3. Update `handleUndo()`

When undoing an action, the UI must also restore the `activeEditKeys` that were visually present at that point in time.

**Replace this block:**

```javascript
        let lastActionDesc = undoStack[undoStack.length - 1].desc;
        redoStack.push({
          lines: currentLines,
          filecontent: filecontent,
          charDefCodeMap: charDefMapCopy,
          desc: `Undo: ${lastActionDesc}`
        });

        let prevState = undoStack.pop();
        let oldState = getSystemState();

```

**With this code:**

```javascript
        let lastActionDesc = undoStack[undoStack.length - 1].desc;
        redoStack.push({
          lines: currentLines,
          filecontent: filecontent,
          charDefCodeMap: charDefMapCopy,
          activeKeys: new Set(activeEditKeys), // Save active keys for redo
          desc: `Undo: ${lastActionDesc}`
        });

        let prevState = undoStack.pop();
        if (prevState.activeKeys) activeEditKeys = new Set(prevState.activeKeys); // Restore keys
        let oldState = getSystemState();

```

---

### 4. Update `handleRedo()`

Similar to undo, redoing an action should accurately push and pull the `activeEditKeys` state from the stack.

**Replace this block:**

```javascript
        let nextState = redoStack.pop();
        undoStack.push({
          lines: currentLines,
          filecontent: filecontent,
          charDefCodeMap: charDefMapCopy,
          desc: nextState.desc
        });

        let oldState = getSystemState();

```

**With this code:**

```javascript
        let nextState = redoStack.pop();
        undoStack.push({
          lines: currentLines,
          filecontent: filecontent,
          charDefCodeMap: charDefMapCopy,
          activeKeys: new Set(activeEditKeys), // Save active keys for undo
          desc: nextState.desc
        });

        if (nextState.activeKeys) activeEditKeys = new Set(nextState.activeKeys); // Restore keys
        let oldState = getSystemState();

```

---

### 5. Update `jumpToLog()`

This ensures that jumping back to a specific timeline point correctly cascades the active UI keys down the redo stack and restores the target layout.

**Replace this block:**

```javascript
        // Transfer chronological items into the redo stack from the trailing end down to the split boundary
        for (let i = undoStack.length - 1; i > index; i--) {
          redoStack.push({
            lines: i === undoStack.length - 1 ? currentLines : undoStack[i + 1].lines,
            filecontent: i === undoStack.length - 1 ? filecontent : undoStack[i + 1].filecontent,
            charDefCodeMap: i === undoStack.length - 1 ? charDefMapCopy : undoStack[i + 1].charDefCodeMap,
            desc: undoStack[i].desc
          });
        }

        // Keep the stack history slice up to and including the targeted executed action index
        undoStack = undoStack.slice(0, index + 1);
        let oldState = getSystemState();

```

**With this code:**

```javascript
        // Transfer chronological items into the redo stack from the trailing end down to the split boundary
        for (let i = undoStack.length - 1; i > index; i--) {
          redoStack.push({
            lines: i === undoStack.length - 1 ? currentLines : undoStack[i + 1].lines,
            filecontent: i === undoStack.length - 1 ? filecontent : undoStack[i + 1].filecontent,
            charDefCodeMap: i === undoStack.length - 1 ? charDefMapCopy : undoStack[i + 1].charDefCodeMap,
            activeKeys: i === undoStack.length - 1 ? new Set(activeEditKeys) : new Set(undoStack[i + 1].activeKeys),
            desc: undoStack[i].desc
          });
        }

        // Keep the stack history slice up to and including the targeted executed action index
        undoStack = undoStack.slice(0, index + 1);
        if (targetState && targetState.activeKeys) activeEditKeys = new Set(targetState.activeKeys); // Restore keys
        let oldState = getSystemState();

```