feat(desktop): Add export functionality

desktop/AGENTS.md

@@ -1,6 +1,6 @@
 # ODE Desktop — AI and developer guide
 
-**ODE Desktop** (`desktop/`) is the Tauri + React + Rust app for **Data management** (observations, sync, import) and the **Forms / app workbench** (bundles, form preview, custom app embed). User-facing overview: [desktop/README.md](README.md).
+**ODE Desktop** (`desktop/`) is the Tauri + React + Rust app for **Data management** (observations, sync, import, **export**) and the **Forms / app workbench** (bundles, form preview, custom app embed). User-facing overview: [desktop/README.md](README.md).
 
 Published docs: [ODE Desktop developer mode](https://opendataensemble.org/docs/guides/ode-desktop-developer-mode) (local custom app iteration).
 

desktop/README.md

@@ -12,10 +12,23 @@ The internal Rust crate may still be named `custodian`; user-facing strings use
 ## Who it is for
 
 - **Field and data staff** managing observations and sync (Data management).
+- **Analysts** exporting local Parquet from Data → **Export** for offline analysis (R, Python, etc.).
 - **Form and app authors** testing bundles and custom apps against Synkronus before mobile deploy (Workbench).
 
 Relationship to other ODE components: **Synkronus** (API), **Formulus** + **formplayer** (runtime parity), **Portal** and **CLI** (same public API — no privileged desktop channel). Long-form prose here is intended to be **copy-friendly** for [opendataensemble.org](https://opendataensemble.org/) documentation; keep user-facing sections free of repo-only trivia (put contributor notes under **Development**).
 
+## Data management — Export
+
+From **Data → Export**, ODE Desktop writes analyst-oriented Parquet from the **active profile’s local workspace** (not from Synkronus over the network):
+
+1. Choose a destination parent folder (last location is remembered for the session, like Import).
+2. Desktop creates a leaf folder named **`YYYYMMDD`** under that parent (overwrite confirmation if it already exists).
+3. One **`<form_type>.parquet`** per form type, plus **`export_manifest.json`**, and **`snippets/`** load scripts (R, Python, Stata, Julia).
+4. Optional **Include pending observations** (local rows not yet synced).
+5. Optional **Include attachments** — copies referenced files into `attachments/` under the export folder. Observation data stores attachment **basenames**; prefix them with the workspace attachments path shown on Profiles / Export (or the export `attachments/` path when copied) to open files on disk.
+
+The Export page also shows copyable load snippets with variables named after each form type. Transforms and study-specific ETL stay **outside** Desktop. For a full **server** dump as a ZIP, use Portal or `synk data export`.
+
 ## Install
 
 Official builds are produced with **`pnpm tauri build`** (artifacts vary by OS: `.msi`, `.dmg`, `.app`, AppImage, `.deb`, etc.). When releases are published, attach those bundles to **GitHub Releases** and link them from project docs.

desktop/docs/UI_FEEDBACK.md

@@ -4,7 +4,7 @@ Single source of truth for how the shell surfaces status, errors, and confirmati
 
 ## Progress banner (full-width)
 
-**Use for:** long-running sync, import, and **app bundle download/apply** jobs.
+**Use for:** long-running sync, import, **export**, and **app bundle download/apply** jobs.
 
 - Renders below the mode switch / dev bar in `Shell`.
 - Shows spinner + status text; optional determinate progress bar when `bundleActivity.total > 0`.