feat(ui): use dropdown selectors for camera brand, model, and lens profile selection - #1191

This PR replaces the plain text input fields in the camera calibration panel with structured ComboBox selectors linked to the built-in camera/lens profiles database. This prevents manual typing typos, ensures data validity, and streamlines the calibration workflow.

Key Changes:

• Database Exposure: Marked the map field of LensProfileDatabase as pub in src/core/lens_profile_database.rs to allow querying profile metadata.
• Rust Controller Methods: Added get_camera_brands(), get_camera_models(brand), and get_lens_models(brand, model) to src/controller.rs to return sorted, unique lists of brands, models, and lenses.
• Generic QML Table Component: Extended TableList.qml to support the "type": "combobox" field mapping, displaying a styled ComboBox that queries the database dynamically and supports autocompletion.
• Calibration UI Panel: Refactored the camera metadata fields in LensCalibrate.qml to use comboboxes, implementing cascading resets (changing brand clears model & lens) to prevent invalid profile configurations.

Verified with cargo test (all 98 tests pass successfully).