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/generated/examples.ts

@@ -52,6 +52,8 @@ export const EXAMPLES: Record<string, unknown> = {
     "subEnableRouting": false,
     "subEncrypt": false,
     "subHideSettings": false,
+    "subIncyEnableRouting": false,
+    "subIncyRoutingRules": "",
     "subJsonEnable": false,
     "subJsonFinalMask": "",
     "subJsonMux": "",
@@ -152,6 +154,8 @@ export const EXAMPLES: Record<string, unknown> = {
     "subEnableRouting": false,
     "subEncrypt": false,
     "subHideSettings": false,
+    "subIncyEnableRouting": false,
+    "subIncyRoutingRules": "",
     "subJsonEnable": false,
     "subJsonFinalMask": "",
     "subJsonMux": "",