feat(ApplicationDetail): implement ArgoCD Application Detail view

- New component: src/components/ApplicationDetail.tsx
  - Route: /argocd/applications/:name
  - Header: app name, health/sync badges, project, namespace, target revision, repo URL
  - Resource Tree: table of Application.status.resources[] with kind, name, namespace, health, sync
  - Sync History: table of Application.status.history[] (last 10) with revision, deployedAt, initiatedBy
  - Events: K8s events via fieldSelector=involvedObject.name={appName}
- Updated src/components/ApplicationsList.tsx: App Name column links to detail view
- Updated src/index.tsx: added ApplicationDetail route
- Unit tests: 11 tests covering pure functions and component smoke tests

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/components/ApplicationsList.tsx

@@ -11,7 +11,7 @@ import InputLabel from "@mui/material/InputLabel";
 import MenuItem from "@mui/material/MenuItem";
 import Select from "@mui/material/Select";
 import React, { useEffect, useMemo, useState } from "react";
-import { useLocation } from "react-router-dom";
+import { Link, useLocation } from "react-router-dom";
 import { ArgoCDApplication, ArgoCDApplicationsList } from "../api/argocd";
 
 // --- Types ---
@@ -165,7 +165,9 @@ export default function ApplicationsList() {
   const columns = [
     {
       label: "App Name",
-      getter: (row: ApplicationRow) => row.name,
+      getter: (row: ApplicationRow) => (
+        <Link to={`/argocd/applications/${row.name}`}>{row.name}</Link>
+      ),
     },
     {
       label: "Namespace",