chore: bootstrap gscMy on @gsc/web-kit + PAM/JIT request flow

Initial commit for gscMy carved out as its own repo (was tracked
loosely under the monorepo's web/ which is gitignored).

What this contains:
- Auth: next-auth v5 via @gsc/web-kit createAuth (Keycloak only,
  identity sourced from claims, no admin.users writes)
- Chrome: @gsc/web-kit AdminShell — replaces the legacy MyShell.
  Sidebar JSON config carried over and mapped to DbMenuItem.
- Middleware: createAuthMiddleware. Public: /access-denied,
  /auth/keycloak, /signed-out, /api/health, /api/pam/approve.
- RP-initiated signout at /api/auth/signout → Keycloak end_session →
  /signed-out (mirrors gscAdmin).
- Phosphor-iconned access-denied + signed-out landing pages.

PAM/JIT request flow (ported from gscAdmin's pre-strip git history):
- /access page (Active + Eligible tables, request modal with
  duration slider + justification + optional MFA)
- API: /api/pam/{eligible, active, audit, request, approve/:token,
  revoke/:id}
- src/lib/{authz, pam, pam-mail, pam-mfa}.ts — same files as
  gscAdmin had before the strip. PAM tables (admin.privilege_*)
  are shared with gscAdmin; gscMy uses the same Prisma model defs.
- Top-bar widget shows active grants with countdown + revoke.

Build/Deploy: Dockerfile (monorepo-root context), k8s manifests for
my.gosec.internal, self-signed TLS placeholder, DNS A record.
Keycloak gsc-my client extended to include my.gosec.internal/* in
redirect_uris + web_origins.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

k8s/deployment.yaml

@@ -0,0 +1,223 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: my-ui
+  namespace: gsc-my
+  labels:
+    app: my-ui
+    component: frontend
+spec:
+  replicas: 2
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxSurge: 1
+      maxUnavailable: 0
+  selector:
+    matchLabels:
+      app: my-ui
+  template:
+    metadata:
+      labels:
+        app: my-ui
+        component: frontend
+        # Egress to the in-cluster web-proxy (Squid) for NextAuth's
+        # Keycloak issuer-discovery fetch to auth.gosec.cloud.
+        egress-internet: "true"
+        # Egress to the internal-gateway proxy (Envoy) so the app can
+        # reach postgresql.internal-gateway.svc.cluster.local:5432.
+        # Selected by the allow-internal-gateway GlobalNetworkPolicy.
+        egress-internal: "true"
+    spec:
+      containers:
+        - name: my-ui
+          image: registry.gosec.internal/gsc-my/ui:v0.1.0
+          imagePullPolicy: Always
+          ports:
+            - containerPort: 3000
+              name: http
+          env:
+            - name: NODE_ENV
+              value: "production"
+            # Route Node fetch() through Squid for Keycloak discovery.
+            - name: HTTP_PROXY
+              value: "http://web-proxy.web-proxy.svc.cluster.local:3128"
+            - name: HTTPS_PROXY
+              value: "http://web-proxy.web-proxy.svc.cluster.local:3128"
+            - name: NO_PROXY
+              value: "localhost,127.0.0.1,.cluster.local,.svc,.gosec.internal"
+            - name: NEXT_PUBLIC_APP_URL
+              value: "https://my.gosec.internal"
+            # Postgres (gsc_core — admin/nav/public/shell schemas).
+            - name: PGHOST
+              valueFrom:
+                secretKeyRef:
+                  name: gsc-my-db
+                  key: host
+            - name: PGPORT
+              valueFrom:
+                secretKeyRef:
+                  name: gsc-my-db
+                  key: port
+            - name: PGUSER
+              valueFrom:
+                secretKeyRef:
+                  name: gsc-my-db
+                  key: user
+            - name: PGPASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: gsc-my-db
+                  key: password
+            - name: PGDATABASE
+              valueFrom:
+                secretKeyRef:
+                  name: gsc-my-db
+                  key: database
+            - name: DATABASE_URL
+              value: "postgresql://$(PGUSER):$(PGPASSWORD)@$(PGHOST):$(PGPORT)/$(PGDATABASE)"
+            # NextAuth + Keycloak (gosecCloud realm).
+            - name: AUTH_KEYCLOAK_ID
+              valueFrom:
+                secretKeyRef:
+                  name: my-ui
+                  key: keycloak-client-id
+            - name: AUTH_KEYCLOAK_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: my-ui
+                  key: keycloak-client-secret
+            - name: AUTH_KEYCLOAK_ISSUER
+              value: "https://auth.gosec.cloud/realms/gosecCloud"
+            - name: NEXTAUTH_URL
+              value: "https://my.gosec.internal"
+            # NextAuth v5 prefers AUTH_URL over NEXTAUTH_URL. Set both
+            # so a stale .env baked into a future image build can't
+            # shadow the runtime config and emit form actions pointing
+            # at the wrong host.
+            - name: AUTH_URL
+              value: "https://my.gosec.internal"
+            - name: AUTH_TRUST_HOST
+              value: "true"
+            - name: NEXTAUTH_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: my-ui
+                  key: nextauth-secret
+            # gsc-ops-api (mTLS) for chat contacts route. Cert files are
+            # mounted from a separate secret if/when the route is used;
+            # leaving the URL unset disables the contacts provider
+            # gracefully — see src/app/api/chat/contacts/route.ts.
+            # - name: OPS_API_URL
+            # - name: OPS_API_KEY
+          resources:
+            requests:
+              memory: "384Mi"
+              cpu: "100m"
+            limits:
+              memory: "768Mi"
+              cpu: "500m"
+          readinessProbe:
+            httpGet:
+              path: /api/health
+              port: 3000
+            initialDelaySeconds: 10
+            periodSeconds: 10
+            timeoutSeconds: 5
+          livenessProbe:
+            httpGet:
+              path: /api/health
+              port: 3000
+            initialDelaySeconds: 30
+            periodSeconds: 30
+            timeoutSeconds: 5
+          securityContext:
+            runAsNonRoot: true
+            runAsUser: 1000
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+          volumeMounts:
+            - name: tmp
+              mountPath: /tmp
+            - name: nextjs-cache
+              mountPath: /app/.next/cache
+      volumes:
+        - name: tmp
+          emptyDir: {}
+        - name: nextjs-cache
+          emptyDir: {}
+      imagePullSecrets:
+        - name: registry-credentials
+      affinity:
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+            - weight: 100
+              podAffinityTerm:
+                labelSelector:
+                  matchExpressions:
+                    - key: app
+                      operator: In
+                      values:
+                        - my-ui
+                topologyKey: kubernetes.io/hostname
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: my-ui
+  namespace: gsc-my
+  labels:
+    app: my-ui
+spec:
+  type: ClusterIP
+  ports:
+    - port: 3000
+      targetPort: 3000
+      protocol: TCP
+      name: http
+  selector:
+    app: my-ui
+
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: my-ui
+  namespace: gsc-my
+  annotations:
+    nginx.ingress.kubernetes.io/proxy-body-size: "10m"
+    nginx.ingress.kubernetes.io/proxy-read-timeout: "60"
+    nginx.ingress.kubernetes.io/proxy-send-timeout: "60"
+    nginx.ingress.kubernetes.io/ssl-redirect: "true"
+    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
+    # ModSecurity + OWASP CRS is enabled cluster-wide; the chunked
+    # NextAuth session cookie (>4 KB of base64 JWE) trips CRS rules
+    # and returns 403 before the request reaches the pod. Same fix
+    # applied to crm-ui / support-ui / chronos / gsc-meet / etc.
+    nginx.ingress.kubernetes.io/enable-modsecurity: "false"
+    nginx.ingress.kubernetes.io/proxy-buffer-size: "16k"
+    nginx.ingress.kubernetes.io/proxy-buffers-number: "8"
+    # Hardening headers (CSP comes from cluster ConfigMap).
+    nginx.ingress.kubernetes.io/configuration-snippet: |
+      more_set_headers "X-Frame-Options: SAMEORIGIN";
+      more_set_headers "X-Content-Type-Options: nosniff";
+      more_set_headers "Referrer-Policy: strict-origin-when-cross-origin";
+      more_set_headers "Strict-Transport-Security: max-age=31536000; includeSubDomains";
+spec:
+  ingressClassName: nginx
+  tls:
+    - hosts:
+        - my.gosec.internal
+      secretName: my-tls-internal
+  rules:
+    - host: my.gosec.internal
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: my-ui
+                port:
+                  number: 3000