Account export / restore-into-new-tree / delete

New account_service + endpoints under /users/me:
- GET /me/export — zip of every owned tree (account.json + media blobs).
- POST /me/import — restore a backup into NEW trees (ids remapped, media
  re-uploaded); non-destructive, never touches existing data.
- DELETE /me — soft-delete the user, their owned trees, and revoke sessions;
  guarded by retyping the account email.

Settings page wires all three (export download, restore upload, delete with
typed-email confirmation). No migration — uses existing tables + soft-delete.

52 backend tests pass (export→restore round-trip + delete guards); frontend builds.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/lib/api/schema.d.ts

@@ -168,7 +168,12 @@ export interface paths {
         get: operations["read_me_api_v1_users_me_get"];
         put?: never;
         post?: never;
-        delete?: never;
+        /**
+         * Delete Account
+         * @description Delete the account: the user, their owned trees, and their sessions.
+         *     Requires retyping the account email as a guard.
+         */
+        delete: operations["delete_account_api_v1_users_me_delete"];
         options?: never;
         head?: never;
         patch?: never;
@@ -194,6 +199,46 @@ export interface paths {
         patch: operations["set_self_person_api_v1_users_me_self_person_patch"];
         trace?: never;
     };
+    "/api/v1/users/me/export": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        /**
+         * Export Account
+         * @description Download a full backup (JSON + media) of every tree the user owns.
+         */
+        get: operations["export_account_api_v1_users_me_export_get"];
+        put?: never;
+        post?: never;
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
+    "/api/v1/users/me/import": {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        get?: never;
+        put?: never;
+        /**
+         * Import Account
+         * @description Restore a previously-exported backup into new trees (non-destructive).
+         */
+        post: operations["import_account_api_v1_users_me_import_post"];
+        delete?: never;
+        options?: never;
+        head?: never;
+        patch?: never;
+        trace?: never;
+    };
     "/api/v1/trees": {
         parameters: {
             query?: never;
@@ -638,6 +683,16 @@ export interface paths {
 export type webhooks = Record<string, never>;
 export interface components {
     schemas: {
+        /** Body_delete_account_api_v1_users_me_delete */
+        Body_delete_account_api_v1_users_me_delete: {
+            /** Confirm Email */
+            confirm_email: string;
+        };
+        /** Body_import_account_api_v1_users_me_import_post */
+        Body_import_account_api_v1_users_me_import_post: {
+            /** File */
+            file: string;
+        };
         /** Body_import_gedcom_api_v1_trees__tree_id__gedcom_import_post */
         Body_import_gedcom_api_v1_trees__tree_id__gedcom_import_post: {
             /** File */
@@ -1624,6 +1679,37 @@ export interface operations {
             };
         };
     };
+    delete_account_api_v1_users_me_delete: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        requestBody: {
+            content: {
+                "application/x-www-form-urlencoded": components["schemas"]["Body_delete_account_api_v1_users_me_delete"];
+            };
+        };
+        responses: {
+            /** @description Successful Response */
+            204: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content?: never;
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
+                };
+            };
+        };
+    };
     set_self_person_api_v1_users_me_self_person_patch: {
         parameters: {
             query?: never;
@@ -1657,6 +1743,61 @@ export interface operations {
             };
         };
     };
+    export_account_api_v1_users_me_export_get: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        requestBody?: never;
+        responses: {
+            /** @description Successful Response */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": unknown;
+                };
+            };
+        };
+    };
+    import_account_api_v1_users_me_import_post: {
+        parameters: {
+            query?: never;
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        requestBody: {
+            content: {
+                "multipart/form-data": components["schemas"]["Body_import_account_api_v1_users_me_import_post"];
+            };
+        };
+        responses: {
+            /** @description Successful Response */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": {
+                        [key: string]: unknown;
+                    };
+                };
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
+                };
+            };
+        };
+    };
     list_my_trees_api_v1_trees_get: {
         parameters: {
             query?: {