refactor: Align vocabulary — component → program / deployment

Canonical terms (see docs/registry.md glossary):
- program: any catalog entry (tool/daemon/frontend) — the software
- service / job: how a program is deployed (systemd .service / .timer)
- deployment: umbrella for the unified service+job+program view

Changes:
- core: ServiceSpec/JobSpec component: → program: (component accepted as
  back-compat validation_alias); DeployedComponent → Deployment.
- api: ComponentSummary/Detail → DeploymentSummary/Detail; GET /components
  → /deployments; GatewayRoute.component → program; GatewayInfo
  .component_count → deployment_count; ServiceActionResponse/action keys
  component → program.
- app: matching type renames, /components → /deployments hook, route
  /component/:name → /deployment/:name, GatewayRoute.program.
- docs: component-registry.md → registry.md (+ canonical glossary);
  CLAUDE.md endpoint list refreshed (drop removed /tools, add typed
  program/service/job + config routes).

Tests: core 92, cli 24, api 52 green; app build clean; ruff clean.

app/src/services/api/hooks.ts

@@ -2,7 +2,7 @@ import { useEffect } from "react"
 import { useQuery, useQueryClient, useMutation } from "@tanstack/react-query"
 import { apiClient } from "./client"
 import type {
-  ComponentDetail,
+  DeploymentDetail,
   ServiceSummary,
   ServiceDetail,
   JobSummary,
@@ -21,8 +21,8 @@ import type {
 // Legacy compat hook — used by ConfigEditorPage and ProgramRedirect
 export function useComponent(name: string) {
   return useQuery({
-    queryKey: ["components", name],
-    queryFn: () => apiClient.get<ComponentDetail>(`/components/${name}`),
+    queryKey: ["deployments", name],
+    queryFn: () => apiClient.get<DeploymentDetail>(`/deployments/${name}`),
     enabled: !!name,
   })
 }
@@ -125,7 +125,7 @@ export function useServiceAction() {
       } catch (err) {
         // Network error from self-restart killing the connection — expected
         if (err instanceof TypeError) {
-          return { component: name, action, status: "accepted" } as ServiceActionResponse
+          return { program: name, action, status: "accepted" } as ServiceActionResponse
         }
         throw err
       }
@@ -144,7 +144,7 @@ export function useProgramAction() {
   const qc = useQueryClient()
   return useMutation({
     mutationFn: ({ name, action }: { name: string; action: string }) =>
-      apiClient.post<{ component: string; action: string; status: string; output: string }>(
+      apiClient.post<{ program: string; action: string; status: string; output: string }>(
         `/programs/${name}/${action}`,
       ),
     onSuccess: () => {