chore: move appdata folder to .claudeDo

src/ClaudeDo.Data/Paths.cs

@@ -41,7 +41,50 @@ public static class Paths
         return trimmed.Length == 0 || trimmed.EndsWith(':') ? path : trimmed;
     }
 
-    /// <summary>~/.todo-app — parent directory for db, logs, config, sandbox, worktrees.</summary>
-    public static string AppDataRoot() =>
-        Expand("~/.todo-app");
+    private const string DirName = ".claudeDo";
+    private const string LegacyDirName = ".todo-app";
+
+    /// <summary>
+    /// ~/.claudeDo — parent directory for db, logs, config, sandbox, worktrees.
+    /// Falls back to the legacy ~/.todo-app while that one still exists and the new one
+    /// doesn't, so a failed <see cref="MigrateLegacyAppDataRoot"/> degrades to "keep using
+    /// the old folder" instead of silently starting over on an empty one.
+    /// </summary>
+    public static string AppDataRoot()
+    {
+        var root = Expand("~/" + DirName);
+        if (!Directory.Exists(root))
+        {
+            var legacy = Expand("~/" + LegacyDirName);
+            if (Directory.Exists(legacy)) return legacy;
+        }
+        return root;
+    }
+
+    /// <summary>
+    /// One-time rename of ~/.todo-app to ~/.claudeDo, including the path literals stored
+    /// inside worker.config.json / ui.config.json. No-op once the new folder exists.
+    /// Called from the Worker at startup before anything opens a file under the root —
+    /// the single mover, so the UI never races it.
+    /// </summary>
+    public static void MigrateLegacyAppDataRoot() => MigrateLegacyAppDataRoot(Expand("~"));
+
+    internal static void MigrateLegacyAppDataRoot(string home)
+    {
+        var root = Path.Combine(home, DirName);
+        var legacy = Path.Combine(home, LegacyDirName);
+        if (Directory.Exists(root) || !Directory.Exists(legacy)) return;
+
+        // A locked file (e.g. an old worker still holding todo.db) fails the move; AppDataRoot
+        // then keeps returning the legacy path and the next start retries.
+        try { Directory.Move(legacy, root); }
+        catch (IOException) { return; }
+        catch (UnauthorizedAccessException) { return; }
+
+        foreach (var cfg in Directory.EnumerateFiles(root, "*.config.json"))
+        {
+            try { File.WriteAllText(cfg, File.ReadAllText(cfg).Replace(LegacyDirName, DirName)); }
+            catch (IOException) { /* best effort — the default already points at the new root */ }
+        }
+    }
 }