feat(sub): add Incy client integration and routing tab

Add an Incy quick-import button (incy://add) to the Android and iOS app menus on the subscription page, and a new Incy settings tab with routing enable + rules. Incy routing is delivered by injecting an incy://routing/onadd line into the raw subscription body, avoiding a collision with Happ's Routing header. Includes backend settings, regenerated OpenAPI/zod schemas, and translations for all locales.

frontend/src/schemas/setting.ts

@@ -39,6 +39,8 @@ export const AllSettingSchema = z.object({
   subAnnounce: z.string().optional(),
   subEnableRouting: z.boolean().optional(),
   subRoutingRules: z.string().optional(),
+  subIncyEnableRouting: z.boolean().optional(),
+  subIncyRoutingRules: z.string().optional(),
   subListen: z.string().optional(),
   subPort: port.optional(),
   subPath: absolutePath.optional(),