Quick Fix Menu does not display "Add to dictionary"

**Describe the bug**
I am unable to add words to the dictionary via the "Quick Fix" menu, despite having a custom dictionary file created and configured in `.vscode/settings.json`. The "Add to Dictionary" option simply does not appear in the context menu for flagged typos.

**To Reproduce**
Steps to reproduce the behavior:
1. Create a blank file named `.harper-dictionary.txt` in the workspace root.
2. Configure `.vscode/settings.json` with the following settings:
```json
{
"harper.workspaceDictPath": "./.harper-dictionary.txt",
"harper.codeActions.forceStable": true
}
```
3. Run the command `Harper: Restart Language Server`.
4. Type a deliberate typo in a file (e.g., `myuniquewordtest`).
5. Hover over the squiggly line and press `Ctrl` + `.` (Quick Fix).
6. **See error:** The menu appears, but the option "Add 'myuniquewordtest' to dictionary" is missing.

**Expected behavior**
When a valid workspace dictionary path is configured and a typo is flagged, the Quick Fix menu should include an option to "Add [word] to dictionary," which should append the word to the referenced text file.

**Screenshots**
*(If applicable, add screenshots to help explain your problem)*

**Platform**
Visual Studio Code

**Additional context**
* **Settings Used:**
```json
{
"editor.defaultFormatter": "myriad-dreamin.tinymist",
"harper.workspaceDictPath": "./.harper-dictionary.txt"
}
```
* I have verified that the `.harper-dictionary.txt` file exists in the root.
* I have tried restarting the Language Server and reloading the VS Code window multiple times.
* I attempted to use `harper.workspaceDictPath` initially, but also tried `harper-ls.workspaceDictPath` with no success.

Start by reproducing the missing action with .vscode/settings.json, .harper-dictionary.txt, and the Harper: Restart Language Server command, then trace the Quick Fix code action entry point. Done means the menu offers “Add [word] to dictionary” for a flagged typo and appends the word to the configured dictionary file.

Written by the indexing model from the issue text.