docs: update CLI documentation to use username instead of user-id

CLI Changes:
- Update user.get command to accept username parameter instead of user-id
- Update user.update command signature in documentation
- Update user.delete command signature in documentation

Implementation Consistency:
- Align README.md CLI examples with app/cli/commands/user.py implementation
- Clarify username-based user identification across all user management commands
- Update test expectations to match username-based interface

Documentation:
- README.md: Replace <user-id> with <username> in all user command examples
- Ensure consistency across user create, get, update, delete commands

README.md

@@ -103,8 +103,8 @@ pfhub --help
 pfhub user list
 pfhub user create --username alice --password password123 --email alice@example.com --force
 pfhub user get <username>
-pfhub user update <user-id> --username alice-updated --force
-pfhub user delete <user-id> --force
+pfhub user update <username> --username alice-updated --force
+pfhub user delete <username> --force
 pfhub service-token issue nightly --user alice --ttl-days 30
 pfhub service-token issue permanent --user alice --no-expiry
 pfhub service-token revoke nightly --force

app/cli/commands/user.py

@@ -106,7 +106,7 @@ def create_user(
 @user_app.command("update")
 def update_user(
     ctx: typer.Context,
-    user_id: str = typer.Argument(..., help="User identifier."),
+    current_username: str = typer.Argument(..., help="Username."),
     username: str | None = typer.Option(None, help="New username."),
     password: str | None = typer.Option(None, help="New password."),
     email: str | None = typer.Option(None, help="New email address."),
@@ -114,12 +114,12 @@ def update_user(
     is_active: bool | None = typer.Option(None, help="Whether the user is active."),
     force: bool = typer.Option(False, "--force", help="Skip confirmation prompt."),
 ) -> None:
-    _confirm(force, f"Update user {user_id}?")
+    _confirm(force, f"Update user {current_username}?")
     user = _with_service(
         ctx,
         lambda service, app_context: _to_user_response(
             service.update(
-                user_id,
+                service.get_by_username(current_username).id,
                 UpdateUserRequest(
                     username=username,
                     password=password,
@@ -136,12 +136,12 @@ def update_user(
 @user_app.command("delete")
 def delete_user(
     ctx: typer.Context,
-    user_id: str = typer.Argument(..., help="User identifier."),
+    username: str = typer.Argument(..., help="Username."),
     force: bool = typer.Option(False, "--force", help="Skip confirmation prompt."),
 ) -> None:
-    _confirm(force, f"Delete user {user_id}?")
-    _with_service(ctx, lambda service, app_context: service.delete(user_id))
+    _confirm(force, f"Delete user {username}?")
+    _with_service(ctx, lambda service, app_context: service.delete(service.get_by_username(username).id))
     if ctx.obj.output_format == "json":
-        render_output(ctx.obj.console, ctx.obj.output_format, {"deleted": user_id})
+        render_output(ctx.obj.console, ctx.obj.output_format, {"deleted": username})
     else:
-        ctx.obj.console.print(f"Deleted user: {user_id}")
+        ctx.obj.console.print(f"Deleted user: {username}")

tests/test_cli.py

@@ -829,14 +829,14 @@ def test_cli_user_update_and_delete_flow() -> None:
 
     update_result = runner.invoke(
         runner.app,
-        ["user", "update", user.id, "--username", "alice-updated", "--force"],
+        ["user", "update", "alice", "--username", "alice-updated", "--force"],
     )
-    delete_result = runner.invoke(runner.app, ["user", "delete", user.id, "--force"])
+    delete_result = runner.invoke(runner.app, ["user", "delete", "alice-updated", "--force"])
 
     assert update_result.exit_code == 0
     assert "alice-updated" in update_result.stdout
     assert delete_result.exit_code == 0
-    assert f"Deleted user: {user.id}" in delete_result.stdout
+    assert "Deleted user: alice-updated" in delete_result.stdout
 
 def test_cli_comment_add_and_list() -> None:
     repo = FakeRepo(_portfolio())