diff --git a/apps/desktop/README.md b/apps/desktop/README.md
index 4812616..56f0264 100644
--- a/apps/desktop/README.md
+++ b/apps/desktop/README.md
@@ -42,6 +42,12 @@ At runtime the shell resolves `sidecars/` from the app resource dir (or `PRM_API
 
 CI builds the same matrix (Ubuntu / macOS / Windows) on pushes to `main`.
 
-## Data
+## Icons
 
-Set `PRM_DATA_DIR` to override the SQLite/vault location (default `../../data` from the API cwd).
+Source mark: `apps/desktop/app-icon.png` (1024²). Regenerate platform icons with:
+
+```bash
+cd apps/desktop && pnpm exec tauri icon ./app-icon.png -o src-tauri/icons
+```
+
+Windows needs `icons/icon.ico`; macOS needs `icons/icon.icns`.
diff --git a/apps/desktop/app-icon.png b/apps/desktop/app-icon.png
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index 0000000..aed6463
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diff --git a/apps/desktop/src-tauri/icons/128x128.png b/apps/desktop/src-tauri/icons/128x128.png
index 5d29ec2..ba7dd71 100644
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diff --git a/apps/desktop/src-tauri/icons/128x128@2x.png b/apps/desktop/src-tauri/icons/128x128@2x.png
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diff --git a/apps/desktop/src-tauri/icons/32x32.png b/apps/desktop/src-tauri/icons/32x32.png
index c4724c1..24515c6 100644
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diff --git a/apps/desktop/src-tauri/icons/64x64.png b/apps/desktop/src-tauri/icons/64x64.png
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index 0000000..9db3e63
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diff --git a/apps/desktop/src-tauri/icons/Square107x107Logo.png b/apps/desktop/src-tauri/icons/Square107x107Logo.png
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index 0000000..9643cf2
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diff --git a/apps/desktop/src-tauri/icons/Square142x142Logo.png b/apps/desktop/src-tauri/icons/Square142x142Logo.png
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diff --git a/apps/desktop/src-tauri/icons/Square150x150Logo.png b/apps/desktop/src-tauri/icons/Square150x150Logo.png
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diff --git a/apps/desktop/src-tauri/icons/Square284x284Logo.png b/apps/desktop/src-tauri/icons/Square284x284Logo.png
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diff --git a/apps/desktop/src-tauri/icons/Square30x30Logo.png b/apps/desktop/src-tauri/icons/Square30x30Logo.png
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diff --git a/apps/desktop/src-tauri/icons/Square310x310Logo.png b/apps/desktop/src-tauri/icons/Square310x310Logo.png
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diff --git a/apps/desktop/src-tauri/icons/Square44x44Logo.png b/apps/desktop/src-tauri/icons/Square44x44Logo.png
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diff --git a/apps/desktop/src-tauri/icons/Square71x71Logo.png b/apps/desktop/src-tauri/icons/Square71x71Logo.png
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diff --git a/apps/desktop/src-tauri/icons/Square89x89Logo.png b/apps/desktop/src-tauri/icons/Square89x89Logo.png
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diff --git a/apps/desktop/src-tauri/icons/StoreLogo.png b/apps/desktop/src-tauri/icons/StoreLogo.png
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index 0000000..9974de4
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diff --git a/apps/desktop/src-tauri/icons/henry.w@example.net b/apps/desktop/src-tauri/icons/henry.w@example.net
index d24cb90..1909762 100644
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diff --git a/apps/desktop/src-tauri/icons/icon.icns b/apps/desktop/src-tauri/icons/icon.icns
new file mode 100644
index 0000000..17844e2
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diff --git a/apps/desktop/src-tauri/icons/icon.ico b/apps/desktop/src-tauri/icons/icon.ico
new file mode 100644
index 0000000..ce76c9a
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diff --git a/apps/desktop/src-tauri/icons/icon.png b/apps/desktop/src-tauri/icons/icon.png
index 425c9f6..5c54ccb 100644
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diff --git a/apps/desktop/src-tauri/tauri.conf.json b/apps/desktop/src-tauri/tauri.conf.json
index 909dd26..1dc6ab9 100644
--- a/apps/desktop/src-tauri/tauri.conf.json
+++ b/apps/desktop/src-tauri/tauri.conf.json
@@ -22,7 +22,8 @@
       "icons/32x32.png",
       "icons/128x128.png",
       "icons/henry.w@example.net",
-      "icons/icon.png"
+      "icons/icon.icns",
+      "icons/icon.ico"
     ],
     "resources": [
       "sidecars/**/*"