Generalize the scratchpad-only model/reasoning-effort selector to work
in any session whose pattern has exactly one agent. This enables model
switching above the chat input for project 1-on-1 chats, not just
scratchpads.
- Rename ScratchpadSessionConfig -> SessionModelConfig across domain,
contracts, IPC, preload, and renderer
- Replace isScratchpadProject guard with agents.length === 1 check in
EryxAppService.updateSessionModelConfig and ChatPane pills gate
- Apply session model config in buildEffectivePattern whenever present,
regardless of project type
- Seed sessionModelConfig on session creation for any single-agent
pattern
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Add persisted session and pattern metadata for pinning, archiving, manual titles, and favorite patterns. Expose backend query and mutation APIs for session library features, and cover the shared helpers with tests.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
