frontend: add unified file action model with context menus across tree, list and pending changes

Co-authored-by: Cursor <cursoragent@cursor.com>

mactfsui/app/lib/tfs/index.ts

@@ -0,0 +1,24 @@
+export { SERVER_ROOT_PATH } from "./session"
+export type { WorkspaceSession } from "./session"
+export {
+  getAncestorPaths,
+  getParentPath,
+  isSameOrUnderPath,
+  normalizeServerPath,
+} from "./path"
+export { findMapping, resolveLocalPath } from "./mapping"
+export {
+  STATUS_BADGE_CLASSES,
+  STATUS_LABELS,
+  resolveItemLocalState,
+  statusBadgeClass,
+  statusLabel,
+} from "./status"
+export type { ItemLocalState } from "./status"
+export { buildFileMenu, makeFileTarget } from "./actions"
+export type {
+  FileActionId,
+  FileMenuItem,
+  FileTarget,
+  FileTargetSource,
+} from "./actions"