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, 64 insertions, 0 deletions

diff --git a/src/features/named-agents/index.ts b/src/features/named-agents/index.ts
new file mode 100644
index 0000000..e66ef8e
--- /dev/null
+++ b/src/features/named-agents/index.ts
@@ -0,0 +1,64 @@
+export {
+  type AgentDraft,
+  type AgentSaved,
+  type DraftValidity,
+  draftModel,
+  draftValidity,
+  isClean,
+  isDirty,
+  type SaveStatus,
+  saveStatus,
+  saveStatusLabel,
+} from "./logic/auto-save";
+export {
+  normalizeNamedAgent,
+  normalizeNamedAgentRecord,
+  normalizeNamedAgents,
+  toNamedAgentInput,
+} from "./logic/normalize";
+export {
+  fullModelFromSelection,
+  joinModel,
+  modelFromFull,
+  modelsForProvider,
+  openCodeNumber,
+  providerFromModel,
+  providerLabel,
+  providerOptions,
+} from "./logic/options";
+export { findNamedAgent, snapshotFor } from "./logic/snapshot";
+export type {
+  CreateNamedAgent,
+  DeleteNamedAgent,
+  LoadNamedAgents,
+  NamedAgent,
+  NamedAgentDeleteResult,
+  NamedAgentInput,
+  NamedAgentResponse,
+  NamedAgentSaveResult,
+  NamedAgentSelectionSnapshot,
+  NamedAgentsResponse,
+  NamedAgentsResult,
+  UpdateNamedAgent,
+} from "./logic/types";
+export {
+  isUsableModel,
+  isUsableName,
+  nameError,
+  normalizeName,
+} from "./logic/validate";
+export {
+  type CardController,
+  type CardControllerOptions,
+  type CardSaveState,
+  createCardController,
+  type NamedAgentPorts,
+} from "./ui/controller.svelte";
+export { default as NamedAgentCard } from "./ui/NamedAgentCard.svelte";
+export { default as NamedAgentsView } from "./ui/NamedAgentsView.svelte";
+
+/** Public module manifest — aggregated by the shell's "Loaded Modules" view. */
+export const manifest = {
+  name: "named-agents",
+  description: "Curated Named Agent presets (name + model) in the sidebar",
+} as const;