Dashboard renders in French instead of English

[TogetherBuilt]

When using the "Open dashboard" command, the dashboard interface and notifications are displayed in French (e.g., "Tâche ajoutée", "Êtes-vous sûr de vouloir supprimer la tâche ... ?", "Oui"/"Non"), regardless of the user's locale or VS Code settings. This impacts accessibility and usability for non-French speaking users.

Steps to Reproduce:

1. Open VS Code with the Copilot Tasks extension installed.
2. Run the "Open dashboard" command.
3. Observe that prompts, confirmation dialogs, and notifications are in French.

Expected Behavior:
All user-facing messages on the dashboard should render in English by default, or respect the user's VS Code locale/language settings.

Actual Behavior:
Messages are hardcoded in French.

Source of Issue:
French strings are hardcoded in src/ui/dashboard-panel.ts. Example lines:

vscode.window.showInformationMessage(`Tâche ajoutée: ${taskText}`);
const response = await vscode.window.showWarningMessage(
  `Êtes-vous sûr de vouloir supprimer la tâche "${task.text}" ?`,
  "Oui",
  "Non"
);
if (response === "Oui") {
  vscode.window.showInformationMessage("Tâche supprimée avec succès");
}

Suggested Solution:

• Replace all hardcoded French strings with English equivalents.
• (Optional) Consider implementing localization support to respect VS Code’s language settings.

Additional Context:
Repository: copilot-tasks
File: src/ui/dashboard-panel.ts

---