diff --git a/Cargo.lock b/Cargo.lock
index 852a9f2..35240fa 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -47,12 +47,38 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "angle"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0bf965b6b142c8c68150e815ef527d17f0fe74e622b2c5287fd8626cb7c4a5fa"
+dependencies = [
+ "num-traits",
+ "serde",
+ "serde_derive",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.104"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "330a5ed07fa54e4702c9d6c4174f74427fc0ef6e214bbd677ae50a5099946470"
 
+[[package]]
+name = "arbitrary"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bc62ac97cc33321f50863d514c3bc38a453947a8f9e781137e47c7401020aed"
+dependencies = [
+ "derive_arbitrary",
+]
+
+[[package]]
+name = "arrayvec"
+version = "0.7.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3fb67a6e08acf24fdeccbac2cb6ac4305825bd1f117462e0e6f2f193345ad56"
+
 [[package]]
 name = "async-stream"
 version = "0.3.6"
@@ -104,6 +130,36 @@ version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0"
 
+[[package]]
+name = "attribute-derive"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05832cdddc8f2650cc2cc187cc2e952b8c133a48eb055f35211f61ee81502d77"
+dependencies = [
+ "attribute-derive-macro",
+ "derive-where",
+ "manyhow",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "attribute-derive-macro"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0a7cdbbd4bd005c5d3e2e9c885e6fa575db4f4a3572335b974d8db853b6beb61"
+dependencies = [
+ "collection_literals",
+ "interpolator",
+ "manyhow",
+ "proc-macro-utils",
+ "proc-macro2",
+ "quote",
+ "quote-use",
+ "syn 2.0.119",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.3.0"
@@ -176,6 +232,30 @@ dependencies = [
  "objc2",
 ]
 
+[[package]]
+name = "borsh"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "553c5d846a6ba5150c65e3b1b8ec073bcf1abc20f9b7220de384a4443ea4e20a"
+dependencies = [
+ "borsh-derive",
+ "bytes",
+ "cfg_aliases",
+]
+
+[[package]]
+name = "borsh-derive"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12cdfe656708a01f89b451a7d36466e6fe6c414de0aa18fc54f864f6f9ca9f56"
+dependencies = [
+ "once_cell",
+ "proc-macro-crate 3.5.0",
+ "proc-macro2",
+ "quote",
+ "syn 3.0.6",
+]
+
 [[package]]
 name = "brotli"
 version = "9.0.0"
@@ -208,9 +288,15 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.16.0"
+version = "3.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
+checksum = "72f5acc6cb2ba439de613abc23857ec3d78374d8ed5ac84e9d11336e87da8649"
+
+[[package]]
+name = "bytecount"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "175812e0be2bccb6abe50bb8d566126198344f707e304f45c648fd8f2cc0365e"
 
 [[package]]
 name = "bytemuck"
@@ -340,6 +426,12 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "cfg_aliases"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f079e83a288787bcd14a6aea84cee5c87a67c5a3e660c30f557a3d24761b3527"
+
 [[package]]
 name = "chrono"
 version = "0.4.38"
@@ -353,6 +445,25 @@ dependencies = [
  "windows-targets 0.52.5",
 ]
 
+[[package]]
+name = "collection_literals"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2550f75b8cfac212855f6b1885455df8eaee8fe8e246b647d69146142e016084"
+
+[[package]]
+name = "color-rs2"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61da6f06f340226f2707c0d3a8de27e8b1cbe09050d440cbb80a0ec87ccbf79e"
+dependencies = [
+ "angle",
+ "half",
+ "num-traits",
+ "serde",
+ "serde_derive",
+]
+
 [[package]]
 name = "combine"
 version = "4.6.8"
@@ -413,6 +524,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "core_detect"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f8f80099a98041a3d1622845c271458a2d73e688351bf3cb999266764b81d48"
+
 [[package]]
 name = "cpufeatures"
 version = "0.2.17"
@@ -446,6 +563,12 @@ version = "0.8.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a31eee39dddec8330830986fcd7625edb5a24ec90ea038215273bbc3adb08ac6"
 
+[[package]]
+name = "crunchy"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
+
 [[package]]
 name = "crypto-common"
 version = "0.1.7"
@@ -570,6 +693,28 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "derive-where"
+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e2b94854e8576378ccda7c8de8a66ed8b4e8acbd2c50ec3418ea6c8aaf4b567"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 3.0.6",
+]
+
+[[package]]
+name = "derive_arbitrary"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b034bd7d5f032402a2479444dcc6f74e36a03f31854d41680fb240ef682a1ac"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 3.0.6",
+]
+
 [[package]]
 name = "derive_more"
 version = "2.1.1"
@@ -739,6 +884,20 @@ version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ef6b89e5b37196644d8796de5268852ff179b44e96276cf4290264843743bb7"
 
+[[package]]
+name = "encoding_rs"
+version = "0.8.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e985e0451871ad22fb8d2b6b076e2028a502a0d3950998c2c5c0a4f9b5d9679"
+dependencies = [
+ "cfg-if",
+ "core_detect",
+ "multiversion_no_op",
+ "rustversion",
+ "scopeguard",
+ "simdutf8",
+]
+
 [[package]]
 name = "equivalent"
 version = "1.0.2"
@@ -1020,6 +1179,37 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "get-size-derive2"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2b6d1e2f75c16bfbcd0f95d84f99858a6e2f885c2287d1f5c3a96e8444a34b4"
+dependencies = [
+ "attribute-derive",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "get-size2"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49cf31a6d70300cf81461098f7797571362387ef4bf85d32ac47eaa59b3a5a1a"
+dependencies = [
+ "get-size-derive2",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff2abc00be7fca6ebc474524697ae276ad847ad0a6b3faa4bcb027e9a4614ad0"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.3.4"
@@ -1191,6 +1381,17 @@ dependencies = [
  "syn 2.0.119",
 ]
 
+[[package]]
+name = "half"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ea2d84b969582b4b1864a92dc5d27cd2b77b622a8d79306834f1be5ba20d84b"
+dependencies = [
+ "cfg-if",
+ "crunchy",
+ "zerocopy",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.12.3"
@@ -1489,6 +1690,12 @@ dependencies = [
  "cfb",
 ]
 
+[[package]]
+name = "interpolator"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71dd52191aae121e8611f1e8dc3e324dd0dd1dee1e6dd91d10ee07a3cfb4d9d8"
+
 [[package]]
 name = "ipnet"
 version = "2.12.2"
@@ -1665,6 +1872,24 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "kparse"
+version = "3.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "503149c856ef5f8728156b55609019cf2714a29ebdb2a82dc1a831d2c743f28a"
+dependencies = [
+ "bytecount",
+ "memchr",
+ "nom",
+ "nom_locate",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20870f649af7073d53e38067b2a84312175d56ea15217e1b15bc83506ec50afb"
+
 [[package]]
 name = "libappindicator"
 version = "0.9.0"
@@ -1740,9 +1965,32 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.21"
+version = "0.4.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
+checksum = "f9f8bd3e56ce4dfc153cf470fffbfa98c7620958b312ca5c3a4b8d5181fd13c6"
+
+[[package]]
+name = "manyhow"
+version = "0.11.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b33efb3ca6d3b07393750d4030418d594ab1139cee518f0dc88db70fec873587"
+dependencies = [
+ "manyhow-macros",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
+[[package]]
+name = "manyhow-macros"
+version = "0.11.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46fce34d199b78b6e6073abf984c9cf5fd3e9330145a93ee0738a7443e371495"
+dependencies = [
+ "proc-macro-utils",
+ "proc-macro2",
+ "quote",
+]
 
 [[package]]
 name = "markup5ever"
@@ -1776,6 +2024,12 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.8.9"
@@ -1828,6 +2082,12 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "multiversion_no_op"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "743fb55ba31b18fb1ecef6bdc9aa2743314978ac084044301a7eee33fb99a20d"
+
 [[package]]
 name = "ndk"
 version = "0.9.0"
@@ -1864,6 +2124,27 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "650eef8c711430f1a879fdd01d4745a7deea475becfb90269c06775983bbf086"
 
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
+[[package]]
+name = "nom_locate"
+version = "4.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e3c83c053b0713da60c5b8de47fe8e494fe3ece5267b2f23090a07a053ba8f3"
+dependencies = [
+ "bytecount",
+ "memchr",
+ "nom",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.2.2"
@@ -2025,6 +2306,7 @@ checksum = "e3e0adef53c21f888deb4fa59fc59f7eb17404926ee8a6f59f5df0fd7f9f3272"
 dependencies = [
  "bitflags 2.13.2",
  "block2",
+ "libc",
  "objc2",
  "objc2-core-foundation",
 ]
@@ -2116,10 +2398,13 @@ dependencies = [
  "chrono",
  "r701",
  "serde",
+ "spreadsheet-ods",
  "tauri",
  "tauri-build",
+ "tauri-plugin-dialog",
  "tokio-stream",
  "toml 0.9.12+spec-1.1.0",
+ "zip",
 ]
 
 [[package]]
@@ -2249,7 +2534,7 @@ checksum = "2896bade328c13f7042a297ea5ac5b0951f6cf989dea5f32c2fd98da398195cb"
 dependencies = [
  "base64 0.23.1",
  "indexmap 2.14.2",
- "quick-xml",
+ "quick-xml 0.42.0",
  "serde",
  "time",
 ]
@@ -2310,6 +2595,15 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4a6394b9e965e73d0a289ee54f589087e2c676aedf60885baf52c76b771e4958"
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85eae3c4ed2f50dcfe72643da4befc30deadb458a9b590d720cde2f2b1e97da9"
+dependencies = [
+ "zerocopy",
+]
+
 [[package]]
 name = "precomputed-hash"
 version = "0.1.1"
@@ -2369,6 +2663,17 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "proc-macro-utils"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eeaf08a13de400bc215877b5bdc088f241b12eb42f0a548d3390dc1c56bb7071"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "smallvec",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.107"
@@ -2378,6 +2683,16 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "quick-xml"
+version = "0.38.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b66c2058c55a409d601666cffe35f04333cf1013010882cec174a7467cd4e21c"
+dependencies = [
+ "encoding_rs",
+ "memchr",
+]
+
 [[package]]
 name = "quick-xml"
 version = "0.42.0"
@@ -2396,6 +2711,28 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "quote-use"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9619db1197b497a36178cfc736dc96b271fe918875fbf1344c436a7e93d0321e"
+dependencies = [
+ "quote",
+ "quote-use-macros",
+]
+
+[[package]]
+name = "quote-use-macros"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82ebfb7faafadc06a7ab141a6f67bcfb24cb8beb158c6fe933f2f035afa99f35"
+dependencies = [
+ "proc-macro-utils",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
 [[package]]
 name = "r-efi"
 version = "5.3.0"
@@ -2419,6 +2756,65 @@ dependencies = [
  "tokio-stream",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e058c7de0b26af77780c769414d6257830bb240f3c38477dbc2c16e5f54d6d4c"
+dependencies = [
+ "libc",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9ef1d0d795eb7d84685bca4f72f3649f064e6641543d3a8c415898726a57b41"
+dependencies = [
+ "rand_chacha 0.9.0",
+ "rand_core 0.9.5",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.9.5",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom 0.2.17",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.9.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
+dependencies = [
+ "getrandom 0.3.4",
+]
+
 [[package]]
 name = "raw-window-handle"
 version = "0.6.2"
@@ -2527,6 +2923,57 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "rfd"
+version = "0.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a15ad77d9e70a92437d8f74c35d99b4e4691128df018833e99f90bcd36152672"
+dependencies = [
+ "block2",
+ "dispatch2",
+ "glib-sys",
+ "gobject-sys",
+ "gtk-sys",
+ "js-sys",
+ "log",
+ "objc2",
+ "objc2-app-kit",
+ "objc2-core-foundation",
+ "objc2-foundation",
+ "raw-window-handle",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+ "windows-sys 0.60.2",
+]
+
+[[package]]
+name = "rust_decimal"
+version = "1.43.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7653272e75dcac41dc199fbea6f5797633994fafd339943c06c9af16bf29cd3a"
+dependencies = [
+ "arrayvec",
+ "borsh",
+ "bytes",
+ "num-traits",
+ "rand 0.8.8",
+ "rand 0.9.5",
+ "serde",
+ "serde_json",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "rust_decimal_macros"
+version = "1.40.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74a5a6f027e892c7a035c6fddb50435a1fbf5a734ffc0c2a9fed4d0221440519"
+dependencies = [
+ "quote",
+ "syn 2.0.119",
+]
+
 [[package]]
 name = "rustc-hash"
 version = "2.1.3"
@@ -2819,6 +3266,12 @@ version = "0.3.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3a219298ac11a56ea9a6d2120044824d6f01aeb034955e7af7bc16858527deea"
 
+[[package]]
+name = "simdutf8"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3a9fe34e3e7a50316060351f37187a3f546bce95496156754b601a5fa71b76e"
+
 [[package]]
 name = "siphasher"
 version = "1.0.4"
@@ -2895,6 +3348,28 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "spreadsheet-ods"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60163f438f3d198d0f871cb0edd5577efeaa8d83ec41a96ede01fbb20d0dcb40"
+dependencies = [
+ "base64 0.22.1",
+ "chrono",
+ "color-rs2",
+ "get-size2",
+ "icu_locale_core",
+ "kparse",
+ "lazy_static",
+ "nom",
+ "nom_locate",
+ "quick-xml 0.38.4",
+ "rust_decimal",
+ "rust_decimal_macros",
+ "string_cache",
+ "zip",
+]
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.1"
@@ -2911,6 +3386,7 @@ dependencies = [
  "parking_lot",
  "phf_shared",
  "precomputed-hash",
+ "serde",
 ]
 
 [[package]]
@@ -3177,6 +3653,64 @@ dependencies = [
  "tauri-utils",
 ]
 
+[[package]]
+name = "tauri-plugin"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1140cf34a3b3b836a13103dcab17f18831d5cc3534cbd435dc01a5c6daa65aa2"
+dependencies = [
+ "anyhow",
+ "glob",
+ "plist",
+ "schemars 0.8.22",
+ "serde",
+ "serde_json",
+ "tauri-utils",
+ "walkdir",
+]
+
+[[package]]
+name = "tauri-plugin-dialog"
+version = "2.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "daf9a5c92e39bdd84f22f6be9230e39d0c4e140345f71ffe6058dca4f71127cf"
+dependencies = [
+ "log",
+ "raw-window-handle",
+ "rfd",
+ "serde",
+ "serde_json",
+ "tauri",
+ "tauri-plugin",
+ "tauri-plugin-fs",
+ "thiserror 2.0.21",
+ "url",
+]
+
+[[package]]
+name = "tauri-plugin-fs"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "466eb32466fe5021b6728b06862f9ff14a9f7e1af890047654e03a96d7c0e1bb"
+dependencies = [
+ "anyhow",
+ "dunce",
+ "glob",
+ "log",
+ "objc2-foundation",
+ "percent-encoding",
+ "schemars 0.8.22",
+ "serde",
+ "serde_json",
+ "serde_repr",
+ "tauri",
+ "tauri-plugin",
+ "tauri-utils",
+ "thiserror 2.0.21",
+ "toml 1.1.6+spec-1.1.0",
+ "url",
+]
+
 [[package]]
 name = "tauri-runtime"
 version = "2.12.1"
@@ -3776,6 +4310,7 @@ dependencies = [
  "cfg-if",
  "once_cell",
  "rustversion",
+ "serde",
  "wasm-bindgen-macro",
  "wasm-bindgen-shared",
 ]
@@ -4121,6 +4656,15 @@ dependencies = [
  "windows-targets 0.48.5",
 ]
 
+[[package]]
+name = "windows-sys"
+version = "0.60.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2f500e4d28234f72040990ec9d39e3a6b950f9f22d3dba18416c35882612bcb"
+dependencies = [
+ "windows-targets 0.53.5",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.61.2"
@@ -4169,13 +4713,30 @@ dependencies = [
  "windows_aarch64_gnullvm 0.52.5",
  "windows_aarch64_msvc 0.52.5",
  "windows_i686_gnu 0.52.5",
- "windows_i686_gnullvm",
+ "windows_i686_gnullvm 0.52.5",
  "windows_i686_msvc 0.52.5",
  "windows_x86_64_gnu 0.52.5",
  "windows_x86_64_gnullvm 0.52.5",
  "windows_x86_64_msvc 0.52.5",
 ]
 
+[[package]]
+name = "windows-targets"
+version = "0.53.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4945f9f551b88e0d65f3db0bc25c33b8acea4d9e41163edf90dcd0b19f9069f3"
+dependencies = [
+ "windows-link",
+ "windows_aarch64_gnullvm 0.53.1",
+ "windows_aarch64_msvc 0.53.1",
+ "windows_i686_gnu 0.53.1",
+ "windows_i686_gnullvm 0.53.1",
+ "windows_i686_msvc 0.53.1",
+ "windows_x86_64_gnu 0.53.1",
+ "windows_x86_64_gnullvm 0.53.1",
+ "windows_x86_64_msvc 0.53.1",
+]
+
 [[package]]
 name = "windows-threading"
 version = "0.2.1"
@@ -4212,6 +4773,12 @@ version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7088eed71e8b8dda258ecc8bac5fb1153c5cffaf2578fc8ff5d61e23578d3263"
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9d8416fa8b42f5c947f8482c43e7d89e73a173cead56d044f6a56104a6d1b53"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.42.2"
@@ -4230,6 +4797,12 @@ version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9985fd1504e250c615ca5f281c3f7a6da76213ebd5ccc9561496568a2752afb6"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9d782e804c2f632e395708e99a94275910eb9100b2114651e04744e9b125006"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.42.2"
@@ -4248,12 +4821,24 @@ version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88ba073cf16d5372720ec942a8ccbf61626074c6d4dd2e745299726ce8b89670"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "960e6da069d81e09becb0ca57a65220ddff016ff2d6af6a223cf372a506593a3"
+
 [[package]]
 name = "windows_i686_gnullvm"
 version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "87f4261229030a858f36b459e748ae97545d6f1ec60e5e0d6a3d32e0dc232ee9"
 
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa7359d10048f68ab8b09fa71c3daccfb0e9b559aed648a8f95469c27057180c"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.42.2"
@@ -4272,6 +4857,12 @@ version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "db3c2bf3d13d5b658be73463284eaf12830ac9a26a90c717b7f771dfe97487bf"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e7ac75179f18232fe9c285163565a57ef8d3c89254a30685b57d83a38d326c2"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.42.2"
@@ -4290,6 +4881,12 @@ version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4e4246f76bdeff09eb48875a0fd3e2af6aada79d409d33011886d3e1581517d9"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c3842cdd74a865a8066ab39c8a7a473c0778a3f29370b5fd6b4b9aa7df4a499"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.42.2"
@@ -4308,6 +4905,12 @@ version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "852298e482cd67c356ddd9570386e2862b5673c85bd5f88df9ab6802b334c596"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ffa179e2d07eee8ad8f57493436566c7cc30ac536a3379fdf008f47f6bb7ae1"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.42.2"
@@ -4326,6 +4929,12 @@ version = "0.52.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.53.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6bbff5f0aada427a1e5a6da5f1f98158182f26556f345ac9e04d36d0ebed650"
+
 [[package]]
 name = "winnow"
 version = "0.5.40"
@@ -4460,6 +5069,26 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "zerocopy"
+version = "0.8.62"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86502bf56ac7c77571a32e2647bb2a15894565e981fb2a48d7bde2d91c965a9d"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.62"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5457206954b06561e2608c7e19cf58b1926586d999c246eebe4502f7e2039d1a"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.119",
+]
+
 [[package]]
 name = "zerofrom"
 version = "0.1.8"
@@ -4514,6 +5143,21 @@ dependencies = [
  "syn 3.0.6",
 ]
 
+[[package]]
+name = "zip"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eb2a05c7c36fde6c09b08576c9f7fb4cda705990f73b58fe011abf7dfb24168b"
+dependencies = [
+ "arbitrary",
+ "crc32fast",
+ "flate2",
+ "indexmap 2.14.2",
+ "memchr",
+ "time",
+ "zopfli",
+]
+
 [[package]]
 name = "zlib-rs"
 version = "0.6.8"
@@ -4525,3 +5169,15 @@ name = "zmij"
 version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "29666d0abbfad1e3dc4dcf6144730dd3a3ab225bbbdac83319345b1b44ccfc1b"
+
+[[package]]
+name = "zopfli"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f05cd8797d63865425ff89b5c4a48804f35ba0ce8d125800027ad6017d2b5249"
+dependencies = [
+ "bumpalo",
+ "crc32fast",
+ "log",
+ "simd-adler32",
+]
diff --git a/oxibadge/bun.lock b/oxibadge/bun.lock
index e6ba8e4..8b59ed8 100644
--- a/oxibadge/bun.lock
+++ b/oxibadge/bun.lock
@@ -9,6 +9,7 @@
         "@fontsource/geist": "^5.3.0",
         "@fontsource/geist-mono": "^5.3.0",
         "@tauri-apps/api": "^2",
+        "@tauri-apps/plugin-dialog": "^2.8.1",
         "svelte-i18n": "^4.0.1",
       },
       "devDependencies": {
@@ -170,6 +171,8 @@
 
     "@tauri-apps/cli-win32-x64-msvc": ["@tauri-apps/cli-win32-x64-msvc@2.12.1", "", { "os": "win32", "cpu": "x64" }, "sha512-dIFaKslrzcbesb+bBh+E1R9km241pHyj32w6D9FPtvQeYpRUFbiCLEa/2S+S0UnIytfxepp4P+X8IerGqnXeYg=="],
 
+    "@tauri-apps/plugin-dialog": ["@tauri-apps/plugin-dialog@2.8.1", "", { "dependencies": { "@tauri-apps/api": "^2.12.0" } }, "sha512-/DtE3B62JgpYuWFL5ATXM6KOXUq7pca7cJWOgSqULhZsgyjLk0PWKek1dbRDvhNBW6flNsOfWphsKnb+738Dmw=="],
+
     "@types/cookie": ["@types/cookie@0.6.0", "", {}, "sha512-4Kh9a6B2bQciAhf7FSuMRRkUWecJgJu9nPnx3yzpsfXX/c50REIqpHY4C82bXP90qrLtXtkDxTZosYO3UpOwlA=="],
 
     "@types/estree": ["@types/estree@1.0.9", "", {}, "sha512-GhdPgy1el4/ImP05X05Uw4cw2/M93BCUmnEvWZNStlCzEKME4Fkk+YpoA5OiHNQmoS7Cafb8Xa3Pya8m1Qrzeg=="],
diff --git a/oxibadge/package.json b/oxibadge/package.json
index 19747ab..1a27b26 100644
--- a/oxibadge/package.json
+++ b/oxibadge/package.json
@@ -18,6 +18,7 @@
     "@fontsource/geist": "^5.3.0",
     "@fontsource/geist-mono": "^5.3.0",
     "@tauri-apps/api": "^2",
+    "@tauri-apps/plugin-dialog": "^2.8.1",
     "svelte-i18n": "^4.0.1"
   },
   "devDependencies": {
diff --git a/oxibadge/src-tauri/Cargo.toml b/oxibadge/src-tauri/Cargo.toml
index 71c98d5..df4dfc8 100644
--- a/oxibadge/src-tauri/Cargo.toml
+++ b/oxibadge/src-tauri/Cargo.toml
@@ -22,3 +22,6 @@ toml = "0.9"
 r701 = { path = "../../r701", features = ["serde"] }
 chrono = { version = "0.4.38", default-features = false, features = ["clock"] }
 tokio-stream = { version = "0.1.19", default-features = false }
+tauri-plugin-dialog = "2.8.1"
+spreadsheet-ods = "1.0.4"
+zip = { version = "6", default-features = false, features = ["deflate"] }
diff --git a/oxibadge/src-tauri/capabilities/default.json b/oxibadge/src-tauri/capabilities/default.json
index 194c1d3..dd51a8f 100644
--- a/oxibadge/src-tauri/capabilities/default.json
+++ b/oxibadge/src-tauri/capabilities/default.json
@@ -5,6 +5,7 @@
   "windows": ["main"],
   "permissions": [
     "core:default",
-    "core:window:allow-destroy"
+    "core:window:allow-destroy",
+    "dialog:default"
   ]
 }
diff --git a/oxibadge/src-tauri/src/export.rs b/oxibadge/src-tauri/src/export.rs
new file mode 100644
index 0000000..9ba0f62
--- /dev/null
+++ b/oxibadge/src-tauri/src/export.rs
@@ -0,0 +1,383 @@
+//! Builds the `.ods` timesheet file(s) the review screen's export button
+//! produces, matching a specific layout/style the user already relies on
+//! in their own spreadsheets (see the project history for the reference
+//! file this was reverse-engineered from): a date column, four punch
+//! columns (entry/exit for each shift) and a formula-driven "hours worked"
+//! column with a monthly total. Column headers are plain text sent by the
+//! frontend (translated via its own i18n), not hardcoded here.
+//!
+//! One employee gets one sheet in one `.ods` file. Exporting more than one
+//! employee at once bundles one `.ods` per employee into a `.zip`.
+
+use chrono::{Duration, NaiveDate};
+use serde::Deserialize;
+use spreadsheet_ods::color::Rgb;
+use spreadsheet_ods::defaultstyles::DefaultFormat;
+use spreadsheet_ods::style::units::{Border, FontSize, TextAlign};
+use spreadsheet_ods::{
+    write_ods_buf, CellStyle, CellStyleRef, Length, Sheet, ValueFormatRef, ValueFormatTimeDuration,
+    WorkBook,
+};
+use std::collections::HashSet;
+use std::io::Write;
+use std::path::Path;
+
+/// One employee's corrected timesheet for a month, as sent by the review
+/// screen's export button. `days[d][c]` is the list of times punched in
+/// slot `c` (entry/exit of the 1st/2nd shift) on day `d + 1`; usually 0 or
+/// 1 entries, more if the day had stacked punches. A stacked slot's times
+/// all end up in the same cell (one per line), matching how the review
+/// screen itself stacks them — the export is a 1:1 copy of the app's data,
+/// nothing is dropped.
+#[derive(Debug, Deserialize)]
+pub struct EmployeeTimesheet {
+    pub id: u32,
+    pub name: String,
+    pub days: Vec<Vec<Vec<String>>>,
+}
+
+/// The column header text, already translated by the frontend.
+#[derive(Debug, Deserialize)]
+pub struct ColumnHeaders {
+    pub date: String,
+    pub in1: String,
+    pub out1: String,
+    pub in2: String,
+    pub out2: String,
+    pub total: String,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct ExportPayload {
+    #[allow(dead_code)]
+    pub scope: String,
+    pub year: i32,
+    pub month: u32,
+    pub employees: Vec<EmployeeTimesheet>,
+    pub headers: ColumnHeaders,
+}
+
+// Column layout, 0-based. A and G are narrow blank spacer columns, matching
+// the reference file.
+const COL_DATE: u32 = 1;
+const COL_IN1: u32 = 2;
+const COL_OUT1: u32 = 3;
+const COL_IN2: u32 = 4;
+const COL_OUT2: u32 = 5;
+const COL_TOTAL: u32 = 7;
+
+const ROW_HEADER: u32 = 1;
+const ROW_FIRST_DAY: u32 = 2;
+
+struct Styles {
+    header_date: CellStyleRef,
+    header_time: CellStyleRef,
+    header_total: CellStyleRef,
+    date_a: CellStyleRef,
+    date_b: CellStyleRef,
+    time_a: CellStyleRef,
+    time_b: CellStyleRef,
+    total_a: CellStyleRef,
+    total_b: CellStyleRef,
+}
+
+/// A centered, bordered, 10pt Liberation Sans cell style, optionally tinted.
+fn styled(name: &str, format: &ValueFormatRef, bg: Option<Rgb<u8>>) -> CellStyle {
+    let mut s = CellStyle::new(name, format);
+    s.set_font_name("Liberation Sans");
+    s.set_font_size(FontSize::from(Length::Pt(10.0)));
+    s.set_color(Rgb::new(0, 0, 0));
+    s.set_text_align(TextAlign::Center);
+    s.set_border(Length::Pt(0.74), Border::Solid, Rgb::new(0, 0, 0));
+    if let Some(rgb) = bg {
+        s.set_background_color(rgb);
+    }
+    s
+}
+
+fn build_styles(wb: &mut WorkBook) -> Styles {
+    let mut duration_fmt = ValueFormatTimeDuration::new_named("ox-duration");
+    duration_fmt.set_truncate_on_overflow(false);
+    duration_fmt.part_hours().long_style().build();
+    duration_fmt.part_text(":").build();
+    duration_fmt.part_minutes().long_style().build();
+    let duration_fmt = wb.add_timeduration_format(duration_fmt);
+
+    let plain = DefaultFormat::default();
+
+    Styles {
+        header_date: wb.add_cellstyle(styled(
+            "ox-header-date",
+            &plain,
+            Some(Rgb::new(0x3f, 0xaf, 0x46)),
+        )),
+        header_time: wb.add_cellstyle(styled(
+            "ox-header-time",
+            &plain,
+            Some(Rgb::new(0x59, 0x83, 0xb0)),
+        )),
+        header_total: wb.add_cellstyle(styled(
+            "ox-header-total",
+            &plain,
+            Some(Rgb::new(0xed, 0x4c, 0x05)),
+        )),
+        date_a: wb.add_cellstyle(styled("ox-date-a", &plain, None)),
+        date_b: wb.add_cellstyle(styled(
+            "ox-date-b",
+            &plain,
+            Some(Rgb::new(0xdd, 0xe8, 0xcb)),
+        )),
+        time_a: wb.add_cellstyle(styled("ox-time-a", &plain, None)),
+        time_b: wb.add_cellstyle(styled(
+            "ox-time-b",
+            &plain,
+            Some(Rgb::new(0xde, 0xe6, 0xef)),
+        )),
+        total_a: wb.add_cellstyle(styled("ox-total-a", &duration_fmt, None)),
+        total_b: wb.add_cellstyle(styled(
+            "ox-total-b",
+            &duration_fmt,
+            Some(Rgb::new(0xff, 0xdb, 0xb6)),
+        )),
+    }
+}
+
+fn parse_hhmm(s: &str) -> Option<i64> {
+    let (h, m) = s.split_once(':')?;
+    let h: i64 = h.parse().ok()?;
+    let m: i64 = m.parse().ok()?;
+    if !(0..24).contains(&h) || !(0..60).contains(&m) {
+        return None;
+    }
+    Some(h * 60 + m)
+}
+
+/// First punch of a slot, parsed to minutes since midnight, or 0 (midnight)
+/// if missing/unparseable — same as how the embedded ODF formula treats a
+/// blank cell in a subtraction.
+fn first_minutes_or_zero(slot: &[String]) -> i64 {
+    slot.first().and_then(|s| parse_hhmm(s)).unwrap_or(0)
+}
+
+/// Worked minutes for a day: (out1 - in1) + (out2 - in2). Matches the
+/// "hours worked" column's formula term for term (blank cells count as 0),
+/// so e.g. a day with only an in1 and an out2 punched (no lunch break) still
+/// nets out to the full span via cancellation, exactly like the live
+/// formula would compute once the file is opened.
+fn worked_minutes(day: &[Vec<String>]) -> i64 {
+    let at = |i: usize| {
+        day.get(i)
+            .map(Vec::as_slice)
+            .map(first_minutes_or_zero)
+            .unwrap_or(0)
+    };
+    (at(1) - at(0)) + (at(3) - at(2))
+}
+
+// The review screen already requires every employee to have a name before
+// it lets the user continue (see NewEmployees.svelte), so `name` here is
+// never genuinely empty. The `id` fallback below only guards the much
+// narrower case of a name that sanitizes down to nothing (e.g. "***"):
+// not a missing name, just one unusable verbatim as a sheet/file name.
+
+fn sanitize_sheet_name(name: &str, id: u32) -> String {
+    let cleaned: String = name
+        .chars()
+        .map(|c| if "[]*?:/\\'".contains(c) { ' ' } else { c })
+        .collect();
+    let trimmed: String = cleaned.trim().chars().take(31).collect();
+    if trimmed.is_empty() {
+        id.to_string()
+    } else {
+        trimmed
+    }
+}
+
+fn sanitize_filename(name: &str, id: u32) -> String {
+    let cleaned: String = name
+        .chars()
+        .map(|c| {
+            if "/\\:*?\"<>|".contains(c) || c.is_control() {
+                '_'
+            } else {
+                c
+            }
+        })
+        .collect();
+    let trimmed = cleaned.trim().trim_matches('.').to_string();
+    if trimmed.is_empty() {
+        id.to_string()
+    } else {
+        trimmed
+    }
+}
+
+/// Builds the `.ods` bytes for one employee's month.
+fn build_ods_bytes(
+    year: i32,
+    month: u32,
+    employee: &EmployeeTimesheet,
+    headers: &ColumnHeaders,
+) -> Result<Vec<u8>, String> {
+    let mut wb = WorkBook::new_empty();
+    let styles = build_styles(&mut wb);
+
+    let mut sheet = Sheet::new(sanitize_sheet_name(&employee.name, employee.id));
+    sheet.set_col_width(0, Length::In(0.1799));
+    for col in [COL_DATE, COL_IN1, COL_OUT1, COL_IN2, COL_OUT2, COL_TOTAL] {
+        sheet.set_col_width(col, Length::In(0.8335));
+    }
+    sheet.set_col_width(6, Length::In(0.1665));
+
+    sheet.set_styled(
+        ROW_HEADER,
+        COL_DATE,
+        headers.date.as_str(),
+        &styles.header_date,
+    );
+    sheet.set_styled(
+        ROW_HEADER,
+        COL_IN1,
+        headers.in1.as_str(),
+        &styles.header_time,
+    );
+    sheet.set_styled(
+        ROW_HEADER,
+        COL_OUT1,
+        headers.out1.as_str(),
+        &styles.header_time,
+    );
+    sheet.set_styled(
+        ROW_HEADER,
+        COL_IN2,
+        headers.in2.as_str(),
+        &styles.header_time,
+    );
+    sheet.set_styled(
+        ROW_HEADER,
+        COL_OUT2,
+        headers.out2.as_str(),
+        &styles.header_time,
+    );
+    sheet.set_styled(
+        ROW_HEADER,
+        COL_TOTAL,
+        headers.total.as_str(),
+        &styles.header_total,
+    );
+
+    let mut row = ROW_FIRST_DAY;
+    let mut total_minutes = 0i64;
+    for (di, day) in employee.days.iter().enumerate() {
+        let empty = day.iter().all(|slot| slot.iter().all(|t| t.is_empty()));
+        if empty {
+            continue;
+        }
+
+        let zebra_b = (row - ROW_FIRST_DAY) % 2 == 1;
+        let (date_style, time_style, total_style) = if zebra_b {
+            (&styles.date_b, &styles.time_b, &styles.total_b)
+        } else {
+            (&styles.date_a, &styles.time_a, &styles.total_a)
+        };
+
+        let date = NaiveDate::from_ymd_opt(year, month, di as u32 + 1)
+            .map(|d| d.format("%d/%m/%Y").to_string())
+            .unwrap_or_default();
+        sheet.set_styled(row, COL_DATE, date, date_style);
+
+        for (col, slot_idx) in [(COL_IN1, 0), (COL_OUT1, 1), (COL_IN2, 2), (COL_OUT2, 3)] {
+            sheet.set_cellstyle(row, col, time_style);
+            if let Some(slot) = day.get(slot_idx) {
+                // A stacked slot (more than one punch) goes into the cell one time per
+                // line, so no punch the app shows is ever silently dropped from the export.
+                let joined = slot
+                    .iter()
+                    .filter(|t| !t.is_empty())
+                    .cloned()
+                    .collect::<Vec<_>>()
+                    .join("\n");
+                if !joined.is_empty() {
+                    sheet.set_value(row, col, joined);
+                }
+            }
+        }
+
+        let minutes = worked_minutes(day);
+        total_minutes += minutes;
+        let odf_row = row + 1; // ODF cell references are 1-based.
+                               // spreadsheet-ods doesn't serialize negative durations correctly (emits per-component
+                               // negative numbers, which Calc can't parse), so the cached value is clamped to 0 for an
+                               // all-zero-or-negative day (unresolved/invalid source data); the live formula, once the
+                               // file is recalculated, still shows the real (possibly negative or #VALUE!) result.
+        sheet.set_styled_value(
+            row,
+            COL_TOTAL,
+            Duration::minutes(minutes.max(0)),
+            total_style,
+        );
+        sheet.set_formula(
+            row,
+            COL_TOTAL,
+            format!("of:=[.F{odf_row}]-[.E{odf_row}]+[.D{odf_row}]-[.C{odf_row}]"),
+        );
+
+        row += 1;
+    }
+
+    let last_data_row = row - 1;
+    if last_data_row >= ROW_FIRST_DAY {
+        let total_row = row + 1; // one blank spacer row, like the reference file.
+        let first_odf_row = ROW_FIRST_DAY + 1;
+        let last_odf_row = last_data_row + 1;
+        sheet.set_styled_value(
+            total_row,
+            COL_TOTAL,
+            Duration::minutes(total_minutes.max(0)),
+            &styles.total_b,
+        );
+        sheet.set_formula(
+            total_row,
+            COL_TOTAL,
+            format!("of:=SUM([.H{first_odf_row}:.H{last_odf_row}])"),
+        );
+    }
+
+    wb.push_sheet(sheet);
+    write_ods_buf(&mut wb, Vec::new()).map_err(|err| err.to_string())
+}
+
+/// Writes the export to `path`: a single `.ods` for one employee, or a
+/// `.zip` of one `.ods` per employee otherwise.
+pub fn export_to_path(payload: ExportPayload, path: &Path) -> Result<(), String> {
+    if payload.employees.len() <= 1 {
+        let employee = payload
+            .employees
+            .first()
+            .ok_or_else(|| "no employees to export".to_string())?;
+        let bytes = build_ods_bytes(payload.year, payload.month, employee, &payload.headers)?;
+        std::fs::write(path, bytes).map_err(|err| err.to_string())
+    } else {
+        let file = std::fs::File::create(path).map_err(|err| err.to_string())?;
+        let mut zip = zip::ZipWriter::new(file);
+        let options = zip::write::SimpleFileOptions::default()
+            .compression_method(zip::CompressionMethod::Deflated);
+
+        let mut used = HashSet::new();
+        for employee in &payload.employees {
+            let bytes = build_ods_bytes(payload.year, payload.month, employee, &payload.headers)?;
+            let base = sanitize_filename(&employee.name, employee.id);
+            let mut name = format!("{base}.ods");
+            let mut n = 2;
+            while !used.insert(name.clone()) {
+                name = format!("{base} ({n}).ods");
+                n += 1;
+            }
+            zip.start_file(&name, options)
+                .map_err(|err| err.to_string())?;
+            zip.write_all(&bytes).map_err(|err| err.to_string())?;
+        }
+        zip.finish().map_err(|err| err.to_string())?;
+        Ok(())
+    }
+}
diff --git a/oxibadge/src-tauri/src/lib.rs b/oxibadge/src-tauri/src/lib.rs
index be3df7b..5f50b40 100644
--- a/oxibadge/src-tauri/src/lib.rs
+++ b/oxibadge/src-tauri/src/lib.rs
@@ -1,11 +1,13 @@
 mod employees;
+mod export;
 mod preferences;
 
 use chrono::{Local, TimeZone};
+use export::ExportPayload;
 use preferences::Settings;
 use r701::{Record, R701};
-use serde::Deserialize;
 use std::collections::{HashMap, HashSet};
+use std::path::PathBuf;
 use tauri::AppHandle;
 use tokio_stream::StreamExt;
 
@@ -130,42 +132,18 @@ async fn load_employees(
     Ok(employees)
 }
 
-/// One employee's corrected timesheet for a month, as sent by the review
-/// screen's export button. `days[d][c]` is the list of times (usually 0
-/// or 1, more if stacked) punched in slot `c` (entry/exit of the 1st/2nd
-/// shift) on day `d + 1`.
-///
-/// For now `export_timesheet` only `dbg!`-prints this, so none of the
-/// fields are read outside of the derived `Debug` impl (which the
-/// dead-code lint deliberately ignores).
-#[derive(Debug, Deserialize)]
-#[allow(dead_code)]
-struct EmployeeTimesheet {
-    id: u32,
-    name: String,
-    days: Vec<Vec<Vec<String>>>,
-}
-
-#[derive(Debug, Deserialize)]
-struct ExportPayload {
-    scope: String,
-    year: i32,
-    month: u32,
-    employees: Vec<EmployeeTimesheet>,
-}
-
-/// Placeholder export: just prints each employee's corrected timesheet.
+/// Writes the review screen's corrected timesheet to `path`, chosen by the
+/// frontend via the native "save" dialog: a single `.ods` for one employee,
+/// or a `.zip` of one `.ods` per employee for an "all employees" export.
 #[tauri::command]
-fn export_timesheet(payload: ExportPayload) {
-    dbg!(&payload.scope, payload.year, payload.month);
-    for employee in &payload.employees {
-        dbg!(employee);
-    }
+fn export_timesheet(payload: ExportPayload, path: String) -> Result<(), String> {
+    export::export_to_path(payload, &PathBuf::from(path))
 }
 
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
+        .plugin(tauri_plugin_dialog::init())
         .invoke_handler(tauri::generate_handler![
             load_settings,
             save_settings,
diff --git a/oxibadge/src/lib/components/NewEmployees.svelte b/oxibadge/src/lib/components/NewEmployees.svelte
index ab8946a..dc0b952 100644
--- a/oxibadge/src/lib/components/NewEmployees.svelte
+++ b/oxibadge/src/lib/components/NewEmployees.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
   import { untrack } from 'svelte';
   import { _ } from 'svelte-i18n';
-  import { isEdited, isEmpty, type NewEmployee } from './new-employees/logic';
+  import { isEdited, isEmpty, isInvalid, type NewEmployee } from './new-employees/logic';
 
   let {
     employees,
@@ -17,12 +17,13 @@
 
   const count = $derived(employees.length);
   const empties = $derived(names.filter((n) => isEmpty(n)).length);
+  const invalids = $derived(names.filter((n) => isInvalid(n)).length);
   const renamed = $derived(names.filter((n, i) => isEdited(n, employees[i].name)).length);
 
   const inputs: HTMLInputElement[] = [];
 
   function submit() {
-    if (empties > 0) return;
+    if (empties > 0 || invalids > 0) return;
     oncontinue?.(employees.map((e, i) => ({ id: e.id, name: names[i].trim(), original: e.name })));
   }
 
@@ -47,6 +48,7 @@
     <div class="list scroll">
       {#each employees as emp, i (emp.id)}
         {@const empty = isEmpty(names[i])}
+        {@const invalid = isInvalid(names[i])}
         {@const edited = isEdited(names[i], emp.name)}
         <div class="item">
           <span class="uid mono">#{emp.id}</span>
@@ -55,10 +57,12 @@
             class="name"
             class:edit={edited}
             class:empty
+            class:invalid
             type="text"
             placeholder={$_('new_employees.missing_placeholder')}
+            title={invalid ? $_('new_employees.invalid_name_title') : undefined}
             aria-label={$_('new_employees.name_aria', { values: { id: emp.id } })}
-            aria-invalid={empty}
+            aria-invalid={empty || invalid}
             bind:value={names[i]}
             onkeydown={(e) => onKeydown(e, i)}
           />
@@ -72,8 +76,11 @@
         {#if empties > 0}
           <span class="red">{$_('new_employees.missing_count', { values: { n: empties } })}</span>
         {/if}
+        {#if invalids > 0}
+          <span class="red">{$_('new_employees.invalid_count', { values: { n: invalids } })}</span>
+        {/if}
       </div>
-      <button type="button" class="btn" disabled={empties > 0} onclick={submit}>
+      <button type="button" class="btn" disabled={empties > 0 || invalids > 0} onclick={submit}>
         <span>{$_('new_employees.continue')}</span>
         <svg width="18" height="18" viewBox="0 0 24 24" aria-hidden="true"><path d="M5 12h14M13 6l6 6-6 6" /></svg>
       </button>
@@ -200,12 +207,14 @@
     background: #161616;
   }
 
-  .name.empty {
+  .name.empty,
+  .name.invalid {
     border: 1px dashed #a8383d;
     background: rgba(229, 72, 77, 0.08);
   }
 
-  .name.empty:focus {
+  .name.empty:focus,
+  .name.invalid:focus {
     border-style: solid;
     border-color: #e5484d;
     box-shadow: 0 0 0 3px rgba(229, 72, 77, 0.18);
diff --git a/oxibadge/src/lib/components/TimesheetReview.svelte b/oxibadge/src/lib/components/TimesheetReview.svelte
index 4d96524..3e25bfa 100644
--- a/oxibadge/src/lib/components/TimesheetReview.svelte
+++ b/oxibadge/src/lib/components/TimesheetReview.svelte
@@ -27,6 +27,8 @@
   import Toast from './review/Toast.svelte';
   import ActionButton from './ActionButton.svelte';
   import ConfirmDialog from './ConfirmDialog.svelte';
+  import ErrorBanner from './ErrorBanner.svelte';
+  import { error, setError, clearError } from '$lib/error';
 
   let {
     year,
@@ -42,7 +44,14 @@
     month: number;
     employees: Employee[];
     shift: Shifts;
-    onexport?: (p: { scope: 'all' | 'one'; year: number; month: number; employees: Employee[] }) => void;
+    /** Returns `false` if the user cancelled (e.g. the save dialog), in which case nothing changes. */
+    onexport?: (p: {
+      scope: 'all' | 'one';
+      year: number;
+      month: number;
+      employees: Employee[];
+      headers: { date: string; in1: string; out1: string; in2: string; out2: string; total: string };
+    }) => Promise<boolean>;
     onrename?: (id: Employee['id'], name: string) => void;
     onback?: () => void;
     /** Called whenever there are (or stop being) edits not yet exported. */
@@ -74,6 +83,7 @@
   let menuOpen = $state(false);
   let confirmScope = $state<'all' | 'one' | null>(null);
   let confirmingUndoAll = $state(false);
+  let exporting = $state(false);
   let toast = $state('');
   let toastTimer: ReturnType<typeof setTimeout> | undefined;
 
@@ -191,10 +201,11 @@
     else doExport(scope);
   }
 
-  function doExport(scope: 'all' | 'one') {
+  async function doExport(scope: 'all' | 'one') {
+    if (exporting) return;
     const pick = scope === 'all' ? names.map((_name, i) => i) : [emp];
     const snap = $state.snapshot(values);
-    onexport?.({
+    const payload = {
       scope,
       year,
       month,
@@ -202,22 +213,41 @@
         id: employees[ei].id,
         name: names[ei],
         days: snap[ei].map((d) => d.map((c) => c.filter((x) => x !== ''))) as Day[]
-      }))
-    });
-    confirmScope = null;
-    menuOpen = false;
-    hasUnexportedChanges = false;
-    toast = $_('review.export_done', {
-      values: { who: scope === 'all' ? $_('review.everyone') : names[emp] }
-    });
-    clearTimeout(toastTimer);
-    toastTimer = setTimeout(() => (toast = ''), 3200);
+      })),
+      headers: {
+        date: $_('export.col_date'),
+        in1: $_('export.col_in1'),
+        out1: $_('export.col_out1'),
+        in2: $_('export.col_in2'),
+        out2: $_('export.col_out2'),
+        total: $_('export.col_total')
+      }
+    };
+
+    exporting = true;
+    clearError();
+    try {
+      const exported = await onexport?.(payload);
+      if (!exported) return; // the user cancelled (e.g. closed the save dialog)
+      confirmScope = null;
+      menuOpen = false;
+      hasUnexportedChanges = false;
+      toast = $_('review.export_done', {
+        values: { who: scope === 'all' ? $_('review.everyone') : names[emp] }
+      });
+      clearTimeout(toastTimer);
+      toastTimer = setTimeout(() => (toast = ''), 3200);
+    } catch (err) {
+      setError(err);
+    } finally {
+      exporting = false;
+    }
   }
 
-  function roundAndExport(scope: 'all' | 'one') {
+  async function roundAndExport(scope: 'all' | 'one') {
     const eis = scope === 'all' ? names.map((_name, i) => i) : [emp];
     for (const ei of eis) roundDaysOf(ei, all[ei].roundDays);
-    doExport(scope);
+    await doExport(scope);
   }
 
   $effect(() => () => clearTimeout(toastTimer));
@@ -357,6 +387,10 @@
           edits={cur.edits}
         />
 
+        {#if $error}
+          <ErrorBanner title={$_('errors.export_title')} message={$error} />
+        {/if}
+
         <div class="table-card">
           <Toolbar
             bind:onlyIssues
diff --git a/oxibadge/src/lib/components/new-employees/logic.ts b/oxibadge/src/lib/components/new-employees/logic.ts
index a08b3a8..77e159d 100644
--- a/oxibadge/src/lib/components/new-employees/logic.ts
+++ b/oxibadge/src/lib/components/new-employees/logic.ts
@@ -7,6 +7,13 @@ export function isEmpty(name: string): boolean {
   return !name.trim();
 }
 
+/** True if `name` contains the Unicode replacement character — the device
+ * sent bytes that aren't valid UTF-8, which the backend lossily converts
+ * rather than fail the whole fetch over one bad name. */
+export function isInvalid(name: string): boolean {
+  return name.includes('�');
+}
+
 export function isEdited(name: string, original: string): boolean {
   return !isEmpty(name) && name.trim() !== original;
 }
diff --git a/oxibadge/src/lib/locales/en.json b/oxibadge/src/lib/locales/en.json
index 1329291..c5f999b 100644
--- a/oxibadge/src/lib/locales/en.json
+++ b/oxibadge/src/lib/locales/en.json
@@ -32,7 +32,8 @@
     "description": "Reading the employee names registered on the time clock. Just a moment."
   },
   "errors": {
-    "title": "Could not reach the time clock"
+    "title": "Could not reach the time clock",
+    "export_title": "Export failed"
   },
   "review": {
     "title": "Clock-in review",
@@ -206,6 +207,16 @@
     "name_aria": "Name of employee #{id}",
     "renamed_count": "{n, plural, one {1 name edited} other {{n} names edited}}",
     "missing_count": "{n, plural, one {1 name missing} other {{n} names missing}}",
+    "invalid_count": "{n, plural, one {1 invalid name} other {{n} invalid names}}",
+    "invalid_name_title": "The time clock sent unreadable characters: fix the name",
     "continue": "Continue"
+  },
+  "export": {
+    "col_date": "Date",
+    "col_in1": "Entry 1",
+    "col_out1": "Exit 1",
+    "col_in2": "Entry 2",
+    "col_out2": "Exit 2",
+    "col_total": "Hours worked"
   }
 }
diff --git a/oxibadge/src/lib/locales/it.json b/oxibadge/src/lib/locales/it.json
index 11d9693..df6eb04 100644
--- a/oxibadge/src/lib/locales/it.json
+++ b/oxibadge/src/lib/locales/it.json
@@ -32,7 +32,8 @@
     "description": "Sto leggendo i nomi dei dipendenti registrati sul timbratore. Ci vuole solo un attimo."
   },
   "errors": {
-    "title": "Impossibile raggiungere il timbratore"
+    "title": "Impossibile raggiungere il timbratore",
+    "export_title": "Esportazione non riuscita"
   },
   "review": {
     "title": "Revisione timbrature",
@@ -206,6 +207,16 @@
     "name_aria": "Nome del dipendente #{id}",
     "renamed_count": "{n, plural, one {1 nome modificato} other {{n} nomi modificati}}",
     "missing_count": "{n, plural, one {1 nome mancante} other {{n} nomi mancanti}}",
+    "invalid_count": "{n, plural, one {1 nome non valido} other {{n} nomi non validi}}",
+    "invalid_name_title": "Il timbratore ha inviato caratteri non leggibili: correggi il nome",
     "continue": "Continua"
+  },
+  "export": {
+    "col_date": "Data",
+    "col_in1": "Ingresso 1",
+    "col_out1": "Uscita 1",
+    "col_in2": "Ingresso 2",
+    "col_out2": "Uscita 2",
+    "col_total": "Ore lavorate"
   }
 }
diff --git a/oxibadge/src/routes/+page.svelte b/oxibadge/src/routes/+page.svelte
index 3539828..aa5c630 100644
--- a/oxibadge/src/routes/+page.svelte
+++ b/oxibadge/src/routes/+page.svelte
@@ -1,10 +1,12 @@
 <script lang="ts">
   import { invoke } from '@tauri-apps/api/core';
   import { getCurrentWindow } from '@tauri-apps/api/window';
+  import { save } from '@tauri-apps/plugin-dialog';
   import { onMount } from 'svelte';
   import { _, locale } from 'svelte-i18n';
   import { monthName } from '$lib/month';
   import { setError, clearError } from '$lib/error';
+  import type { Employee } from '$lib/components/review/analysis';
   import Screen from '$lib/components/Screen.svelte';
   import Onboarding from '$lib/components/Onboarding.svelte';
   import ConfirmMonth from '$lib/components/ConfirmMonth.svelte';
@@ -143,6 +145,28 @@
   async function onEmployeeRenamed(id: number, name: string) {
     await mergeEmployeeNames({ [String(id)]: name });
   }
+
+  /** Lets the user pick a destination (native "save" dialog) and writes the export there.
+   * One employee exports a single `.ods`; more than one bundles a `.zip` of `.ods` files.
+   * Returns `false` without writing anything if the user cancels the dialog. */
+  async function onExport(payload: {
+    scope: 'all' | 'one';
+    year: number;
+    month: number;
+    employees: Employee[];
+    headers: { date: string; in1: string; out1: string; in2: string; out2: string; total: string };
+  }): Promise<boolean> {
+    const multi = payload.employees.length > 1;
+    const extension = multi ? 'zip' : 'ods';
+    const who = multi ? $_('review.all_employees') : payload.employees[0].name;
+    const path = await save({
+      defaultPath: `${monthName($locale, payload.month)} ${payload.year} - ${who}.${extension}`,
+      filters: [{ name: extension.toUpperCase(), extensions: [extension] }]
+    });
+    if (!path) return false;
+    await invoke('export_timesheet', { payload, path });
+    return true;
+  }
 </script>
 
 {#if step === 'review'}
@@ -152,7 +176,7 @@
     employees={reviewEmployees}
     shift={shifts}
     onback={() => requestLeaveReview(() => (step = 'confirm-month'))}
-    onexport={(payload) => invoke('export_timesheet', { payload })}
+    onexport={onExport}
     onrename={onEmployeeRenamed}
     ondirtychange={(dirty) => (reviewDirty = dirty)}
   />