Enable touch controls in the mobile File Manager

[bifrost0x]

Summary

• open folders with a single touch tap while keeping file selection and checkbox multi-select predictable
• preserve native vertical touch scrolling, enlarge coarse-pointer targets, and keep desktop drag-and-drop unchanged
• replace the long-press action sheet with localized, accessible buttons and prevent release events from triggering actions accidentally
• add unit and real touch-emulation coverage for taps, scrolling, long-press actions, and pointer-specific dragging

Testing

• node --test tests/js/*.test.js (35 test files)
• python -m pytest -q tests/test_file_manager_source_ui.py tests/test_i18n_parity.py tests/test_webssh2_shell.py tests/test_profile_launcher_ui.py tests/test_key_management_ui.py (81 passed)
• playwright test tests/e2e/file-workspace.spec.js tests/e2e/session-workspace.spec.js --forbid-only (22 passed)
• ESLint on the changed JavaScript and Playwright files
• git diff --check

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-08-31T12:51:29.323459Z	19767be	PR opened

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 19767bec46

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