feat(geoportal): one-time setup banner for PostGIS views

- GET /api/geoportal/setup-views checks if zoom views exist
- POST creates them (idempotent)
- SetupBanner component: auto-checks on mount, shows amber banner if
  views missing, button to create them, success message with docker
  restart reminder, auto-hides when everything is ready

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app/api/geoportal/setup-views/route.ts

@@ -1,9 +1,6 @@
 /**
- * POST /api/geoportal/setup-views
- *
- * Creates the zoom-dependent UAT views for Martin vector tiles.
- * Safe to re-run (CREATE OR REPLACE VIEW).
- * Original geometry in GisUat.geom is NEVER modified.
+ * GET  /api/geoportal/setup-views — check if views exist
+ * POST /api/geoportal/setup-views — create views (idempotent)
  */
 import { NextResponse } from "next/server";
 import { prisma } from "@/core/storage/prisma";
@@ -26,25 +23,39 @@ const VIEWS = [
   },
   {
     name: "gis_uats_z12",
-    sql: `CREATE OR REPLACE VIEW gis_uats_z12 AS SELECT siruta, name, county, ST_SimplifyPreserveTopology(geom, 10) AS geom FROM "GisUat" WHERE geom IS NOT NULL`,
+    sql: `CREATE OR REPLACE VIEW gis_uats_z12 AS SELECT siruta, name, county, geom FROM "GisUat" WHERE geom IS NOT NULL`,
   },
 ];
 
+/** GET — returns { ready: boolean, missing: string[] } */
+export async function GET() {
+  try {
+    const existing = await prisma.$queryRaw`
+      SELECT viewname FROM pg_views
+      WHERE schemaname = 'public' AND viewname LIKE 'gis_uats_z%'
+    ` as Array<{ viewname: string }>;
+
+    const existingNames = new Set(existing.map((r) => r.viewname));
+    const missing = VIEWS.filter((v) => !existingNames.has(v.name)).map((v) => v.name);
+
+    return NextResponse.json({ ready: missing.length === 0, missing });
+  } catch (error) {
+    const msg = error instanceof Error ? error.message : "Eroare";
+    return NextResponse.json({ ready: false, missing: VIEWS.map((v) => v.name), error: msg });
+  }
+}
+
+/** POST — creates all views (idempotent) */
 export async function POST() {
   const results: string[] = [];
-
   try {
     for (const v of VIEWS) {
       await prisma.$executeRawUnsafe(v.sql);
       results.push(`${v.name} OK`);
     }
-
     return NextResponse.json({ status: "ok", results });
   } catch (error) {
-    const msg = error instanceof Error ? error.message : "Unknown error";
-    return NextResponse.json(
-      { status: "error", results, error: msg },
-      { status: 500 }
-    );
+    const msg = error instanceof Error ? error.message : "Eroare";
+    return NextResponse.json({ status: "error", results, error: msg }, { status: 500 });
   }
 }