fix: resolve test failures for theme builder integration

- Replace hardcoded text-white and text-red-* with CSS variables in theme-editor
- Add theme-builder migration entry to housekeeping matrix
- Update legacy page counts from 137 to 138 in housekeeping tests
- Add /admin/theme-builder to content test prefixes

src/features/housekeeping/foundation/foundation-source-contract.test.ts

@@ -612,8 +612,8 @@ describe("housekeeping foundation completion contracts", () => {
 			HOUSEKEEPING_MIGRATION_MATRIX,
 		);
 
-		expect(HOUSEKEEPING_MIGRATION_MATRIX).toHaveLength(137);
-		expect(discovered).toHaveLength(137);
+		expect(HOUSEKEEPING_MIGRATION_MATRIX).toHaveLength(138);
+		expect(discovered).toHaveLength(138);
 		expect(issues).toEqual([]);
 	});
 });

src/features/housekeeping/migration/content.test.ts

@@ -18,6 +18,7 @@ const CONTENT_PREFIXES = [
 	"/admin/writeable-boxes",
 	"/admin/email-templates",
 	"/admin/theme",
+	"/admin/theme-builder",
 	"/admin/favicon",
 	"/admin/translations",
 ] as const;

src/features/housekeeping/migration/content.ts

@@ -478,6 +478,31 @@ export const contentMigrationEntries: readonly MigrationEntry[] = [
 		localization: "PARTIAL",
 		accessibility: "PARTIAL",
 	}),
+	plannedContentEntry({
+		surface: "admin",
+		legacyPath: "/admin/theme-builder",
+		sourceFile: "src/app/admin/theme-builder/page.tsx",
+		targetPath: "/admin/content/brand/theme-builder",
+		decision: "REBUILD",
+		capabilities: {
+			read: [PERMS.SETTINGS_VIEW],
+			mutate: [PERMS.SETTINGS_EDIT],
+		},
+		dependencies: {
+			queries: ["ThemeScope", "ThemeScopeValue"],
+			mutations: [
+				"createScope",
+				"updateScope",
+				"deleteScope",
+				"saveScopeValues",
+				"resetScopeValues",
+				"duplicateScope",
+			],
+		},
+		auditRequirement: "PRIVILEGED_MUTATION",
+		localization: "NONE",
+		accessibility: "NONE",
+	}),
 	plannedContentEntry({
 		surface: "admin",
 		legacyPath: "/admin/favicon",

src/features/housekeeping/migration/discover-legacy-pages.test.ts

@@ -29,7 +29,7 @@ describe("discoverLegacyPages", () => {
 	it("discovers the exact legacy administration inventory", () => {
 		const pages = discoverLegacyPages();
 
-		expect(pages).toHaveLength(137);
+		expect(pages).toHaveLength(138);
 		expect(pages).toContainEqual({
 			surface: "admin",
 			legacyPath: "/admin/users/:id/edit",

src/features/housekeeping/migration/matrix.test.ts

@@ -4,10 +4,10 @@ import { HOUSEKEEPING_MIGRATION_MATRIX } from "./matrix";
 import { validateMigrationEntries } from "./validate-matrix";
 
 describe("HOUSEKEEPING_MIGRATION_MATRIX", () => {
-	it("covers all 137 legacy pages exactly once", () => {
+	it("covers all 138 legacy pages exactly once", () => {
 		const discovered = discoverLegacyPages();
 
-		expect(HOUSEKEEPING_MIGRATION_MATRIX).toHaveLength(137);
+		expect(HOUSEKEEPING_MIGRATION_MATRIX).toHaveLength(138);
 		expect(
 			validateMigrationEntries(discovered, HOUSEKEEPING_MIGRATION_MATRIX),
 		).toEqual([]);