feat(gui): goal wire domain, client goal state, and docked goal bar

- apiproxy goals RPC domain (get/create/edit/pause/resume/complete/clear)
  with CAS refs, zod schemas, and fetch client/handler wiring
- client runtime session goal state: live goal/change meta triggers a
  coalesced refetch; mutations fold transport errors into RpcResult
- web GoalBar: docked strip above the composer (sparkle, phase label,
  truncated objective, inline edit, clear; resume when paused); creation
  stays on the /goal command
- GoalBarActions in the ui-conversation contract layer; IconSparkle16
  moves to ui-primitives icons

packages/host/apiproxy/src/fetch/handler.ts

@@ -22,6 +22,15 @@ import {
   sessionPromptRequestSchema,
 } from '../api/sessions.schema.ts'
 import { hostDescribeRequestSchema } from '../api/host.schema.ts'
+import {
+  goalGetRequestSchema,
+  goalCreateRequestSchema,
+  goalEditRequestSchema,
+  goalPauseRequestSchema,
+  goalResumeRequestSchema,
+  goalCompleteRequestSchema,
+  goalClearRequestSchema,
+} from '../api/goals.schema.ts'
 
 /**
  * Unary dispatch table, keyed by (and compiler-locked to) RpcMethodMap: a map row without a
@@ -44,6 +53,13 @@ const UNARY_ROUTES: UnaryRoutes = {
   'session.prompt': { schema: sessionPromptRequestSchema, invoke: (api, r) => api.sessions.prompt(r) },
   'session.cancel': { schema: sessionCancelRequestSchema, invoke: (api, r) => api.sessions.cancel(r) },
   'host.describe': { schema: hostDescribeRequestSchema, invoke: (api, r) => api.host.describe(r) },
+  'goal.get': { schema: goalGetRequestSchema, invoke: (api, r) => api.goals.get(r) },
+  'goal.create': { schema: goalCreateRequestSchema, invoke: (api, r) => api.goals.create(r) },
+  'goal.edit': { schema: goalEditRequestSchema, invoke: (api, r) => api.goals.edit(r) },
+  'goal.pause': { schema: goalPauseRequestSchema, invoke: (api, r) => api.goals.pause(r) },
+  'goal.resume': { schema: goalResumeRequestSchema, invoke: (api, r) => api.goals.resume(r) },
+  'goal.complete': { schema: goalCompleteRequestSchema, invoke: (api, r) => api.goals.complete(r) },
+  'goal.clear': { schema: goalClearRequestSchema, invoke: (api, r) => api.goals.clear(r) },
 }
 
 /** Route lookup that narrows an arbitrary path segment to a map key (single cast point for the string→key refinement). */