refactor: Rename component pages to program pages and remove tools concept

The 'tools' concept was just a filtered view of programs and added unnecessary
complexity to the frontend. This commit:

- Removes ToolCard.tsx and Tools.tsx (pages/components never used in router)
- Renames ComponentDetail.tsx → ProgramDetail.tsx (exports ProgramDetailPage)
- Renames ComponentRedirect.tsx → ProgramRedirect.tsx (exports ProgramRedirect)
- Updates imports in routes.tsx to match new file names
- Fixes stale comment in hooks.ts

Frontend naming now aligns with the unified programs model.

app/src/pages/ProgramDetail.tsx

@@ -6,7 +6,7 @@ import { DetailHeader } from "@/components/detail/DetailHeader"
 import { ConfigPanel } from "@/components/detail/ConfigPanel"
 import { ProgramActions, ActionOutputPanel, type ActionOutput } from "@/components/ProgramActions"
 
-export function ComponentDetailPage() {
+export function ProgramDetailPage() {
   useEventStream()
   const { name } = useParams<{ name: string }>()
   const { data: component, isLoading, error, refetch } = useProgram(name ?? "")

app/src/pages/ProgramRedirect.tsx

@@ -1,7 +1,7 @@
 import { useParams, Navigate } from "react-router-dom"
 import { useComponent } from "@/services/api/hooks"
 
-export function ComponentRedirect() {
+export function ProgramRedirect() {
   const { name } = useParams<{ name: string }>()
   const { data: component, isLoading, error } = useComponent(name ?? "")
 

app/src/pages/Tools.tsx

@@ -1,33 +0,0 @@
-import { Link } from "react-router-dom"
-import { ArrowLeft } from "lucide-react"
-import { usePrograms } from "@/services/api/hooks"
-import { ToolCard } from "@/components/ToolCard"
-
-export function ToolsPage() {
-  const { data: tools, isLoading } = usePrograms("tool")
-
-  return (
-    <div className="max-w-6xl mx-auto px-6 py-8">
-      <Link to="/" className="text-[var(--primary)] hover:underline flex items-center gap-1 mb-6">
-        <ArrowLeft size={16} /> Back
-      </Link>
-
-      <h1 className="text-3xl font-bold mb-2">Tools</h1>
-      <p className="text-sm text-[var(--muted)] mb-8">
-        CLI utilities installed to PATH via castle and run with uv.
-      </p>
-
-      {isLoading ? (
-        <p className="text-[var(--muted)]">Loading tools...</p>
-      ) : tools?.length ? (
-        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
-          {tools.map((tool) => (
-            <ToolCard key={tool.id} tool={tool} />
-          ))}
-        </div>
-      ) : (
-        <p className="text-[var(--muted)]">No tools registered.</p>
-      )}
-    </div>
-  )
-}