refactor(status-page): apply review feedback on theme-fields backend

- StatusPage Mongoose model: import DEFAULT_STATUS_PAGE_THEME / DEFAULT_STATUS_PAGE_THEME_MODE from types/statusPage so the four sources of the default literal stay locked together
- openapi.json: add explicit "default" alongside the enum on StatusPageTheme and StatusPageThemeMode component schemas; documentation already mentioned the defaults but the JSON didn't carry them
- statusPageController: add JSDoc-style comments above withoutThemeFields and applyDefaultTheme spelling out the asymmetric strip-on-write / force-on-read semantics so the next reviewer doesn't have to re-derive the design

server/openapi.json

@@ -3354,11 +3354,13 @@
 			"StatusPageTheme": {
 				"type": "string",
 				"enum": ["refined", "modern", "bold", "editorial"],
+				"default": "refined",
 				"description": "Visual theme for the public status page. Defaults to 'refined'."
 			},
 			"StatusPageThemeMode": {
 				"type": "string",
 				"enum": ["auto", "light", "dark"],
+				"default": "auto",
 				"description": "Forces a light/dark mode on the public page. 'auto' follows the visitor's OS preference. Defaults to 'auto'."
 			},
 			"SuccessResponse": {

server/src/controllers/statusPageController.ts

@@ -40,6 +40,9 @@ class StatusPageController implements IStatusPageController {
 		return StatusPageController.SERVICE_NAME;
 	}
 
+	// Used when STATUS_PAGE_THEMES_ENABLED is false: drop incoming theme fields
+	// before persisting so an admin client can't accidentally store a value the
+	// public page won't honour.
 	private withoutThemeFields = (body: Record<string, unknown>): Record<string, unknown> => {
 		const rest = { ...body };
 		delete rest.theme;
@@ -47,6 +50,10 @@ class StatusPageController implements IStatusPageController {
 		return rest;
 	};
 
+	// Used when STATUS_PAGE_THEMES_ENABLED is false: overwrite the stored
+	// theme/themeMode with their defaults on read so callers see consistent
+	// values regardless of what's in the DB. Whatever a user previously chose
+	// is preserved in Mongo and resurfaces if the flag is flipped back on.
 	private applyDefaultTheme = (statusPage: StatusPage): StatusPage => ({
 		...statusPage,
 		theme: DEFAULT_STATUS_PAGE_THEME,

server/src/db/models/StatusPage.ts

@@ -1,6 +1,12 @@
 import { Schema, model, type Types } from "mongoose";
 import type { StatusPage, StatusPageLogoDocument } from "@/types/statusPage.js";
-import { StatusPageTypes, StatusPageThemes, StatusPageThemeModes } from "@/types/statusPage.js";
+import {
+	DEFAULT_STATUS_PAGE_THEME,
+	DEFAULT_STATUS_PAGE_THEME_MODE,
+	StatusPageThemeModes,
+	StatusPageThemes,
+	StatusPageTypes,
+} from "@/types/statusPage.js";
 
 type StatusPageDocumentBase = Omit<
 	StatusPage,
@@ -111,12 +117,12 @@ const StatusPageSchema = new Schema<StatusPageDocument>(
 		theme: {
 			type: String,
 			enum: StatusPageThemes,
-			default: "refined",
+			default: DEFAULT_STATUS_PAGE_THEME,
 		},
 		themeMode: {
 			type: String,
 			enum: StatusPageThemeModes,
-			default: "auto",
+			default: DEFAULT_STATUS_PAGE_THEME_MODE,
 		},
 	},
 	{ timestamps: true }