kv-import: 1Password .1pux and CSV import, encrypted export (M5)

New crate kv-import (pure parsing, no store) and kv-ffi/src/import.rs:
- .1pux: accounts -> vaults -> items; Login/Password/Card/Note/Identity mapped, other categories
  as secure notes; unmapped fields appended to notes; attachments and password history reported.
- CSV: 1Password 8 export and generic headers (aliases, BOM, quotes, embedded newlines,
  extra columns into notes).
- Duplicates on (title, username, URL host): skip or add " (imported)".
- Encrypted export KVEX v1: Argon2id (>= account KDF minimum) + XChaCha20-Poly1305,
  authenticated header, padded JSON; restorable through import.
- Caps: 100 MB input, 64 MB decompressed export.data, 10k zip entries, 100k items.
- FFI: VaultCore.import_preview / import_commit / export_encrypted (unlocked only); items are
  sealed, seq-stamped and queued for sync like save_item.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

Cargo.lock

@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "adler2"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
+
 [[package]]
 name = "aead"
 version = "0.5.2"
@@ -347,6 +353,12 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4e7648175b45a9a48536d676f68d918270699102aa8dab5496df06904c914600"
 
+[[package]]
+name = "cfg_aliases"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f079e83a288787bcd14a6aea84cee5c87a67c5a3e660c30f557a3d24761b3527"
+
 [[package]]
 name = "chacha20"
 version = "0.9.1"
@@ -485,6 +497,15 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01a7799fd6b852db0e61728dde9a204c423b44d689dbd432522543614b490e78"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "crunchy"
 version = "0.2.4"
@@ -742,6 +763,16 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aedcfb3409746eddb02b9e19ebda1c3394f759a152e48ee875a0844d1b955484"
 
+[[package]]
+name = "flate2"
+version = "1.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e634e2e0ebac1ee034020da1ca582e17ffe4e0f5e985823721e168928136dcb"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -1318,6 +1349,7 @@ version = "0.1.0"
 dependencies = [
  "hkdf",
  "kv-crypto",
+ "kv-import",
  "kv-model",
  "kv-proto",
  "kv-store",
@@ -1331,6 +1363,27 @@ dependencies = [
  "uniffi",
  "uuid",
  "zeroize",
+ "zip",
+]
+
+[[package]]
+name = "kv-import"
+version = "0.1.0"
+dependencies = [
+ "argon2",
+ "chacha20poly1305",
+ "flate2",
+ "kv-crypto",
+ "kv-model",
+ "kv-proto",
+ "serde",
+ "serde_json",
+ "thiserror 2.0.21",
+ "unicode-normalization",
+ "url",
+ "uuid",
+ "zeroize",
+ "zip",
 ]
 
 [[package]]
@@ -1479,6 +1532,16 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
+[[package]]
+name = "miniz_oxide"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b63fbc4a50860e98e7b2aa7804ded1db5cbc3aff9193adaff57a6931bf7c4b4c"
+dependencies = [
+ "adler2",
+ "simd-adler32",
+]
+
 [[package]]
 name = "mio"
 version = "1.2.4"
@@ -1490,6 +1553,18 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "nix"
+version = "0.31.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf20d2fde8ff38632c426f1165ed7436270b44f199fc55284c38276f9db47c3d"
+dependencies = [
+ "bitflags",
+ "cfg-if",
+ "cfg_aliases",
+ "libc",
+]
+
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -2086,6 +2161,12 @@ dependencies = [
  "rand_core",
 ]
 
+[[package]]
+name = "simd-adler32"
+version = "0.3.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a219298ac11a56ea9a6d2120044824d6f01aeb034955e7af7bc16858527deea"
+
 [[package]]
 name = "siphasher"
 version = "0.3.11"
@@ -2434,6 +2515,12 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
+[[package]]
+name = "typed-path"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e28f89b80c87b8fb0cf04ab448d5dd0dd0ade2f8891bae878de66a75a28600e"
+
 [[package]]
 name = "typenum"
 version = "1.20.1"
@@ -3030,6 +3117,20 @@ dependencies = [
  "syn 3.0.9",
 ]
 
+[[package]]
+name = "zip"
+version = "9.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a954114b47a54df49f83d2722814e86b23d4bb1b54a1b90fb7d92b41619ddc22"
+dependencies = [
+ "crc32fast",
+ "flate2",
+ "indexmap",
+ "memchr",
+ "nix",
+ "typed-path",
+]
+
 [[package]]
 name = "zmij"
 version = "1.0.23"