feat(named-agents): sidebar view, synthetic provider, auto-save, snapshot semantics

Implement the frontend of the Named Agents feature (plan §5-§9):
- New features/named-agents module: pure logic (types re-exported from
  @dispatch/wire + transport-contract, validation, provider/model options,
  snapshot helpers, network normalizers, auto-save status model) + an injected
  auto-save controller (name debounce, immediate provider/model save, monotonic
  stale-response guard) + the collapsible sidebar card view.
- Store: /named-agents CRUD + boot seed; selectModel(model, snapshot?) persists
  the raw model WITH the namedAgent snapshot; draft promotion carries it;
  refreshModel restores ModelResponse.namedAgent.
- Chat store setNamedAgent (sends namedAgent on chat.send); Tab.snapshot +
  setSnapshot (retained across rename/remove, persisted with tabs).
- Model selector: synthetic Named Agents provider ALWAYS first; selecting one
  resolves to the raw model + records a snapshot; a retained snapshot of a
  renamed/removed agent still displays as unavailable (plan §7).
- Composition root wires the view (viewKinds + loaded-modules manifest) + feeds
  the selector.

Tests: logic + controller + selector + app-store CRUD (1246 pass), typecheck 0,
biome clean (only pre-existing config infos pending a future migrate), build OK.

1 files changed, 10 insertions, 0 deletions

diff --git a/AGENTS.md b/AGENTS.md
index 8636b61..b29811e 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -145,6 +145,16 @@ reasoning-effort selector (Model view, under the provider/model dropdowns; stick
 `GET`/`PUT /reasoning-effort`, `null` ⇒ "high (default)"). Plan in
 `../backend/notes/frontend-design.md` §10.
 
+NAMED AGENTS DONE + committed (feature/named-agents): a collapsible **Named Agents** sidebar view
+(cards with name/provider/model controls, auto-save statuses incl. debounced name edits + the
+monotonic stale-response guard, Remove/Add/empty state), the synthetic **Named Agents** provider as
+the ALWAYS-FIRST option in the regular model selector (selecting one resolves it to its raw model and
+records a `NamedAgentSelectionSnapshot` on the conversation — plan §7), full CRUD over
+`GET/POST/PUT/DELETE /named-agents`, and snapshot semantics retained on tabs (survive rename/remove +
+persist to localStorage). Backend contract (this worktree) carries `NamedAgent`/`NamedAgentSelectionSnapshot`
+(`@dispatch/wire`) + `/named-agents` types and `ChatRequest.namedAgent`/`ModelResponse.namedAgent`/
+`SetModelRequest.namedAgent` (`@dispatch/transport-contract`); see `backend-handoff.md`.
+
 ## Reports
 Optionally record a finished milestone in `reports/<name>.md` (gitignored): what you built,
 the public surface, verification output, and any contract gaps / backend-contract CRs.