Feat:
- Using Tauri v2 by default
- Add new configuration to initiate mobile app
- Add dependencies needed for mobile build
Test:
- Confirm to be built successfully
- Confirm to keep settings for desktop and build successfully
- Reuse most of components from desktop version
Implemented `isAbsolutePath` helper to correctly identify POSIX, Windows drive‑letter, and UNC absolute paths. Updated `planModelLoad` to automatically resolve relative model and mmproj paths against the Jan data folder, enhancing usability for users supplying non‑absolute paths. Also refined minor formatting for readability.
Expose the new `mmproj_offload` option in the model settings UI and include it in the `ModelPlan` type. The component now collects the offload flag (`result.offloadMmproj`) and queues it with other setting updates to ensure a single atomic change, preventing race conditions when toggling this feature. This enables users to control MMProj offloading directly from the app.
The flag `noOffloadMmproj` was misleading – it actually indicates when the mmproj file **is** offloaded to VRAM. Renaming it to `offloadMmproj` clarifies its purpose and aligns the naming with the surrounding code.
Additionally, the `planModelLoad` signature has been reordered to place `mmprojPath` before `requestedCtx`, improving readability and making the optional parameters more intuitive. All related logic, calculations, and log messages have been updated to use the new flag name.
The original calculation used only the `block_count` from the model metadata, which excludes the final LM head and the embedding layer. This caused an underestimation of the total number of layers and consequently an incorrect `layerSize` value. Adding `+2` accounts for these two missing layers, ensuring accurate model size metrics.
Added a GPU memory check using `getSystemInfo` to ensure Vulkan is selected only on systems with at least 6 GB of VRAM.
* Made `determineBestBackend` asynchronous and updated all callers to `await` it.
* Adjusted backend priority list to include or demote Vulkan based on the memory check.
* Updated Vulkan support detection in `backend.ts` to rely solely on API version (memory check moved to selection logic).
* Imported `getSystemInfo` and refined file‑existence validation.
These changes prevent sub‑optimal Vulkan usage on low‑memory GPUs and improve backend selection reliability.
