* fix(ui): unify channel pickers with icons
Preserve channel values and mutation ownership across Automations, pairing, setup, and Workboard while sharing accessible picker rendering and artwork.
* refactor(ui): unify model pickers
Share provider-aware model selection across chat, new sessions, Automations, Agents, model defaults, Session Observer, Talk, and Memory while preserving owner-specific values and locks.
* fix(ui): keep picker change callbacks value-only
Keep the Web Awesome element private to model-picker custom-mode handling while preserving one-argument callbacks for every picker consumer.
* fix(ui): satisfy model picker types
Keep custom sentinel options within the shared model option shape and guard optional Memory placeholder translation keys.
* refactor(ui): remove obsolete model option template import
Drop the Lit import after Agents model options became pure shared-picker data.
* fix(ui): satisfy picker lint gates
Use explicit model option mapping, remove stale E2E locals, and keep the Cron behavior suite within its enforced line budget.
* test(ui): target unified session model picker
joshavant