Fix admin demo review and landing regressions

Backend/Migrations/20260629183000_SeedLiveDemoAwardData.cs

@@ -128,7 +128,7 @@ public partial class SeedLiveDemoAwardData : Migration
                     award_groups.group_name,
                     tiers.tier_name,
                     award_groups.group_slug || '-' || tiers.tier_slug,
-                    award_groups.description || ' Demo-Tier: ' || tiers.tier_name || '.',
+                    award_groups.description,
                     (award_groups.ord * 100) + (tiers.ord * 10),
                     3,
                     tiers.min_viewers,

Backend/Migrations/20260629185000_SeedCurrentSeasonDemoVotingData.cs

@@ -45,7 +45,7 @@ public partial class SeedCurrentSeasonDemoVotingData : Migration
 
                 WITH award_groups(ord, group_name, group_slug, description, name_prefix) AS (
                     VALUES
-                        (1, 'Main Awards', 'main-awards', 'Die groessten Allround-Auszeichnungen der aktuellen Demo-Season.', 'Astra'),
+                        (1, 'Main Awards', 'main-awards', 'Die groessten Allround-Auszeichnungen der aktuellen Season.', 'Astra'),
                         (2, 'Discovery', 'discovery', 'Neue Stimmen, Debuets und Creator, die in dieser Season besonders sichtbar geworden sind.', 'Nova'),
                         (3, 'Creative', 'creative', 'Model, Design, Rigging, Art und visuelle Praesentation im Stream.', 'Velvet'),
                         (4, 'Performance', 'performance', 'Gesang, Musik, Buehnenpraesenz und besondere Live-Momente.', 'Melo'),
@@ -76,7 +76,7 @@ public partial class SeedCurrentSeasonDemoVotingData : Migration
                     award_groups.group_name,
                     tiers.tier_name,
                     award_groups.group_slug || '-' || tiers.tier_slug,
-                    award_groups.description || ' Demo-Tier: ' || tiers.tier_name || '.',
+                    award_groups.description,
                     (award_groups.ord * 100) + (tiers.ord * 10),
                     3,
                     tiers.min_viewers,

Backend/Migrations/20260630061341_SanitizeDemoCategoryDescriptions.cs

@@ -0,0 +1,48 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Backend.Migrations
+{
+    /// <inheritdoc />
+    public partial class SanitizeDemoCategoryDescriptions : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.Sql(
+                """
+                UPDATE "Categories"
+                SET "Description" = trim(
+                    regexp_replace(
+                        replace("Description", 'aktuellen Demo-Season', 'aktuellen Season'),
+                        '\s*Demo-Tier:\s*[^.]+\.',
+                        '',
+                        'g'
+                    )
+                )
+                WHERE "Description" LIKE '%Demo-Tier:%'
+                   OR "Description" LIKE '%aktuellen Demo-Season%';
+                """
+            );
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.Sql(
+                """
+                UPDATE "Categories"
+                SET "Description" = "Description" || ' Demo-Tier: ' || "Name" || '.'
+                WHERE "ViewerRangeMin" IS NOT NULL
+                  AND "Description" NOT LIKE '%Demo-Tier:%';
+
+                UPDATE "Categories"
+                SET "Description" = replace("Description", 'aktuellen Season', 'aktuellen Demo-Season')
+                WHERE "Slug" LIKE 'main-awards-%'
+                  AND "Description" LIKE '%aktuellen Season%';
+                """
+            );
+        }
+    }
+}