feat(api): add guild settings API endpoints

Add REST endpoints for managing per-guild configuration:
- GET /api/guilds/:guildId/settings
- PUT/PATCH /api/guilds/:guildId/settings
- DELETE /api/guilds/:guildId/settings

web/src/routes/guild-settings.routes.ts

@@ -0,0 +1,64 @@
+/**
+ * @fileoverview Guild settings endpoints for Aurora API.
+ * Provides endpoints for reading and updating per-guild configuration
+ * stored in the database.
+ */
+
+import type { RouteContext, RouteModule } from "./types";
+import { jsonResponse, errorResponse, withErrorHandling } from "./utils";
+import { guildSettingsService } from "@shared/modules/guild-settings/guild-settings.service";
+import { invalidateGuildConfigCache } from "@shared/lib/config";
+
+const GUILD_SETTINGS_PATTERN = /^\/api\/guilds\/(\d+)\/settings$/;
+
+async function handler(ctx: RouteContext): Promise<Response | null> {
+    const { pathname, method, req } = ctx;
+
+    const match = pathname.match(GUILD_SETTINGS_PATTERN);
+    if (!match || !match[1]) {
+        return null;
+    }
+
+    const guildId = match[1];
+
+    if (method === "GET") {
+        return withErrorHandling(async () => {
+            const settings = await guildSettingsService.getSettings(guildId);
+            if (!settings) {
+                return jsonResponse({ guildId, configured: false });
+            }
+            return jsonResponse({ ...settings, guildId, configured: true });
+        }, "fetch guild settings");
+    }
+
+    if (method === "PUT" || method === "PATCH") {
+        try {
+            const body = await req.json() as Record<string, unknown>;
+            const { guildId: _, ...settings } = body;
+            const result = await guildSettingsService.upsertSettings({
+                guildId,
+                ...settings,
+            } as Parameters<typeof guildSettingsService.upsertSettings>[0]);
+            invalidateGuildConfigCache(guildId);
+            return jsonResponse(result);
+        } catch (error) {
+            const message = error instanceof Error ? error.message : String(error);
+            return errorResponse("Failed to save guild settings", 400, message);
+        }
+    }
+
+    if (method === "DELETE") {
+        return withErrorHandling(async () => {
+            await guildSettingsService.deleteSettings(guildId);
+            invalidateGuildConfigCache(guildId);
+            return jsonResponse({ success: true });
+        }, "delete guild settings");
+    }
+
+    return null;
+}
+
+export const guildSettingsRoutes: RouteModule = {
+    name: "guild-settings",
+    handler
+};

web/src/routes/index.ts

@@ -9,6 +9,7 @@ import { statsRoutes } from "./stats.routes";
 import { actionsRoutes } from "./actions.routes";
 import { questsRoutes } from "./quests.routes";
 import { settingsRoutes } from "./settings.routes";
+import { guildSettingsRoutes } from "./guild-settings.routes";
 import { itemsRoutes } from "./items.routes";
 import { usersRoutes } from "./users.routes";
 import { classesRoutes } from "./classes.routes";
@@ -27,6 +28,7 @@ const routeModules: RouteModule[] = [
     actionsRoutes,
     questsRoutes,
     settingsRoutes,
+    guildSettingsRoutes,
     itemsRoutes,
     usersRoutes,
     classesRoutes,