fix argocd install + add root bootstrap Application manifest

- remove server.httproute from argocd values.yaml: helm install failed
  since Gateway API CRDs (installed by envoy-gateway, wave 2) don't
  exist yet; HTTPRoute is already applied manually in Phase 6
- add bootstrap-app.yaml as the Git-committed root/seed Application,
  replacing ad-hoc UI creation (GitOps anti-pattern: apps not stored
  in Git can't be recreated)

README.md

@@ -125,22 +125,15 @@ git push origin main
 
 ---
 
-## Phase 4 — Create bootstrap app in ArgoCD UI
+## Phase 4 — Apply the root bootstrap Application
 
-In ArgoCD UI, create a new Application:
+`bootstrap-app.yaml` (repo root) is the one seed manifest — it lives in Git, not created ad-hoc via UI/CLI. Per GitOps practice, every Application ArgoCD runs must be recreatable from Git; a UI-created app that's stored nowhere can't survive a rebuild. This is the only manifest ever applied by hand — everything downstream (including ArgoCD managing itself, wave -1) is reached by ArgoCD syncing `bootstrap/apps/` from here.
 
-| Field | Value |
-|-------|-------|
-| Application Name | `bootstrap` |
-| Project | `default` |
-| Sync Policy | Automated (enable Prune + Self Heal) |
-| Repository URL | `https://gitea.fireflylab.cc/duynguyen/cluster-bootstrap.git` |
-| Revision | `main` |
-| Path | `bootstrap/apps` |
-| Cluster URL | `https://kubernetes.default.svc` |
-| Namespace | `argocd` |
+```bash
+kubectl apply -f bootstrap-app.yaml
+```
 
-Click **Create**. ArgoCD syncs all child Applications in wave order automatically.
+ArgoCD syncs all child Applications in wave order automatically, including self-managing itself via `bootstrap/apps/argocd.yaml` (wave -1).
 
 Monitor progress:
 
@@ -273,6 +266,7 @@ All Applications should be `Synced` / `Healthy`.
 ```
 cluster-bootstrap/
 ├── README.md
+├── bootstrap-app.yaml                 # root seed Application — the only manifest applied by hand
 ├── bootstrap/
 │   └── apps/                         # ArgoCD Application CRDs
 │       ├── argocd.yaml               # wave -1 — self-managed ArgoCD

bootstrap-app.yaml

@@ -0,0 +1,18 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: bootstrap
+  namespace: argocd
+spec:
+  project: default
+  source:
+    repoURL: https://gitea.fireflylab.cc/duynguyen/cluster-bootstrap.git
+    targetRevision: main
+    path: bootstrap/apps
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: argocd
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true

manifests/argocd/values.yaml

@@ -24,9 +24,3 @@ configs:
 
 server:
   replicas: 1
-  httproute:
-    enabled: true
-    parentRefs:
-      - name: envoy-gateway
-        namespace: gateway-system
-        sectionName: http