feat(yedek): JSON tam hane yedeği backend (önizleme, geri yükleme, geri dönüş noktaları)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/types/BackupCount.ts

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+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type BackupCount = { 
+/**
+ * Koleksiyon adı (`entries`, `periods`, …)
+ */
+kind: string, 
+/**
+ * Türkçe ad
+ */
+label: string, backup: number, current: number, };

frontend/src/types/BackupPreview.ts

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+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { BackupCount } from "./BackupCount";
+
+export type BackupPreview = { source_name: string, same_household: boolean, 
+/**
+ * RFC 3339
+ */
+exported_at: string, app_version: string, counts: Array<BackupCount>, 
+/**
+ * Yedekteki dönemlerin ilk ve son günü
+ */
+first_date: string | null, last_date: string | null, 
+/**
+ * Aynı hane: yedekten sonra eklenen/değişen (kaybolacak) kayıt
+ */
+changed_since: number, warnings: Array<string>, };

frontend/src/types/BackupStatus.ts

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+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { RestorePoint } from "./RestorePoint";
+
+export type BackupStatus = { 
+/**
+ * Son dışa aktarma (RFC 3339); hiç alınmadıysa `null`
+ */
+last_backup_at: string | null, 
+/**
+ * En yeniden eskiye; sahip olmayana boş
+ */
+restore_points: Array<RestorePoint>, keep_points: number, keep_days: number, };

frontend/src/types/RestorePoint.ts

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+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type RestorePoint = { id: string, 
+/**
+ * RFC 3339
+ */
+created_at: string, 
+/**
+ * `before_restore`: dosyadan geri yüklemeden önce · `before_undo`: geri almadan önce
+ */
+reason: "before_restore" | "before_undo", periods: number, entries: number, 
+/**
+ * Sıkıştırılmış boyut (bayt)
+ */
+size: number, };

frontend/src/types/RestoreResult.ts

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+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type RestoreResult = { 
+/**
+ * İşlemden önceki durumun geri dönüş noktası ("Geri al" bununla)
+ */
+restore_point_id: string, };