refactor: Remove dedicated /tools endpoints, use /programs?behavior=tool instead

Eliminates inconsistency where tools had their own filtered view but daemons and frontends didn't.

Changes:
- API: Removed tools router and ToolSummary/ToolDetail models. Added optional behavior query parameter to GET /programs for filtering by program type (tool, daemon, frontend).
- Frontend: Updated hooks to pass behavior param to usePrograms instead of separate useTools. Updated components to use ProgramSummary type. Removed useToolDetail hook.
- Docs: Updated API documentation to reflect program behavior filtering.

app/src/services/api/hooks.ts

@@ -16,8 +16,6 @@ import type {
   MeshStatus,
   NodeSummary,
   NodeDetail,
-  ToolSummary,
-  ToolDetail,
 } from "@/types"
 
 // Legacy compat hook — used by ConfigEditorPage and ComponentRedirect
@@ -59,10 +57,11 @@ export function useJob(name: string) {
   })
 }
 
-export function usePrograms() {
+export function usePrograms(behavior?: string) {
+  const params = behavior ? `?behavior=${behavior}` : ""
   return useQuery({
-    queryKey: ["programs"],
-    queryFn: () => apiClient.get<ProgramSummary[]>("/programs"),
+    queryKey: ["programs", behavior ?? "all"],
+    queryFn: () => apiClient.get<ProgramSummary[]>(`/programs${params}`),
   })
 }
 
@@ -187,21 +186,6 @@ export function useMeshStatus() {
   })
 }
 
-export function useTools() {
-  return useQuery({
-    queryKey: ["tools"],
-    queryFn: () => apiClient.get<ToolSummary[]>("/tools"),
-  })
-}
-
-export function useToolDetail(name: string) {
-  return useQuery({
-    queryKey: ["tools", name],
-    queryFn: () => apiClient.get<ToolDetail>(`/tools/${name}`),
-    enabled: !!name,
-  })
-}
-
 export function useEventStream() {
   const qc = useQueryClient()