feat: list and route models through every configured provider

Metadata now resolves models.ini over provider defaults over presets.ini,
so a local model keeps getting its context and vision from the preset
while remaining overridable. A model whose vision support is unknown no
longer blocks an attachment: unknown is not the same as no, and the API
will reject an image if it really cannot take one.

Key resolution moves to the worker thread so a pass: key's pinentry
never freezes the GUI. KeyResolver gains a lock since StreamWorker and
TitleWorker can now overlap. Skipped providers surface in the status bar
rather than only on stderr. model_info uses dataclasses.replace to avoid
mutating the ModelInfo that resolve() may return from the store.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

0 files changed, 0 insertions, 0 deletions