web: reset links to the default mode, and keep CN agents dial-only by default [CI]

POST /api/admin/links/reset clears every manual link setting and turns automatic linking on. In the default rules a listening node in CN ranks below a listening node elsewhere, so the CN side dials; the links are pushed again when a node's country is first resolved or changes.

web/shared/api/schema.ts

@@ -1040,6 +1040,23 @@ export interface paths {
         patch?: never;
         trace?: never;
     };
+    "/api/admin/links/reset": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        get?: never;
+        put?: never;
+        /** Drop every manual link setting and turn automatic linking on: who dials whom follows the default rules again */
+        post: operations["links_reset"];
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
     "/api/admin/links/{dialer_id}/{listener_id}": {
         parameters: {
             query?: never;
@@ -5891,6 +5908,44 @@ export interface operations {
             };
         };
     };
+    links_reset: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        requestBody?: never;
+        responses: {
+            /** @description OK */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["LinkMatrixDto"];
+                };
+            };
+            /** @description Unauthorized */
+            401: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/problem+json": components["schemas"]["ProblemDto"];
+                };
+            };
+            /** @description Forbidden */
+            403: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/problem+json": components["schemas"]["ProblemDto"];
+                };
+            };
+        };
+    };
     links_set: {
         parameters: {
             query?: never;