ui : add the models manager (#29583)
* ui : add the drawer, sheet and grouped list primitives
Add the drawer and sheet overlay components, the toggle and toggle
group, the shared searchable input, the collapsible sections and the
grouped list, and the near viewport helper they position with.
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* ui : add the shared model components and data layer
Add the model row pieces shared by the selector and the manager, the
models store with its download status feed, the huggingface and
migration services, and the model utils, enums and constants they
read through.
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* ui : rework the models selector around its providers
Group the selector components under their own folder, rework the list
around the provider grouping, add the mobile trigger and the download
item, and derive the selection state in one hook.
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* ui : add the models manager
Add the manager table with its repo, quant and status rows, the
filters and the toolbar, the row actions in a drawer, the downloads
section, the manage models dialog and the stories and tests.
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* ui : rework the chat form actions and the mobile experience
Move the add actions into a drawer and a sheet, float the model
actions in a bar on a phone, open the context panel in a drawer, and
derive the attachment, reasoning and tools menus in hooks.
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* ui : move the mcp servers to the sidebar rail and tidy the dialogs
Move the mcp servers dialog to the sidebar rail with its menu
entries, even out the dialogs on a phone, and group the mcp and
settings stores behind their own modules.
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* ui : polish the shell
The secondary button gets its own look back and the chat add button its
own light surface. Pressable elements get a pointer cursor again, the
font rendering smooths on the app shell, and the agent skills stay out
of prettier's way.
The root layout props probe rework that came with this polish reads the
providers api url and stays with the providers change instead.
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* ui : wrap the model id classes
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* ui : load the model the new chat CTA picks
Start a new chat selected the model but left it unloaded, so the chat
opened against a server with nothing in memory. Both CTAs share a load
helper now.
Assisted-by: pi:llama.cpp/DeepSeek-V4.1-Flash
* refactor: Post-review fixes
