TP-29 — End-to-end theme import test

[ZhuchkaTriplesix]

Epic: E
Depends on: TP-21, TP-23

Source: docs/theme-parser-github-issues.md

Goal

Cover the full import/select path with a fake filesystem theme.

Files

• test/features/settings/theme_import_flow_test.dart

Implementation

Use fake/temp app support path if project test support allows it.

Flow:

1. Put custom JSON in temp source.
2. Import through service/controller.
3. Registry list includes it.
4. Select it.
5. ThemeController.activeTheme changes expected token.
6. Restart-like reload preserves selection.

Acceptance Criteria

• Custom theme can be imported, selected, and restored.
• Test does not depend on real user home directory.

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