cleanup desktop and mobile assets and icons

This fixes quirks for different platforms

js/desktop/assets/icon-sources/README.md

@@ -0,0 +1,42 @@
+# Icon sources
+
+These files are **not shipped** in the app. They are the masters used to
+regenerate the platform icon files that live one level up in `assets/`.
+
+## What ships (in `assets/`)
+
+| File         | Platform | Used by                                   | Shape        |
+| ------------ | -------- | ----------------------------------------- | ------------ |
+| `flowy.ico`  | Windows  | `forge.config.ts` (`setupIcon` + app icon)| full-bleed   |
+| `flowy.icns` | macOS    | `forge.config.ts` (`icon: './assets/flowy'`) | rounded/padded |
+| `icon.png`   | both     | dev dock icon (`main.ts`) + in-app favicon   | rounded/padded |
+
+`forge.config.ts` references the app icon as `./assets/flowy` (no extension);
+Electron Forge appends `.ico` on Windows and `.icns` on macOS, so those two
+files must keep the same `flowy` basename.
+
+## Why two different shapes
+
+- **Windows** draws icons edge-to-edge and adds no rounding, so its source is
+  **full-bleed** (`windows-fullbleed-1024.png`). A padded/rounded image renders
+  visibly smaller than neighboring app icons.
+- **macOS** expects the Apple icon grid: a rounded squircle with ~10% transparent
+  margin baked in (`macos.iconset/`). Full-bleed art looks oversized on the Dock.
+
+## Regenerating
+
+### Windows — `flowy.ico`
+From a full-bleed 1024×1024 PNG (`windows-fullbleed-1024.png`):
+
+```sh
+npx png-to-ico ./icon-sources/windows-fullbleed-1024.png > ./flowy.ico
+```
+
+Produces a multi-resolution `.ico` (16/32/48/256) — the sizes Windows actually uses.
+
+### macOS — `flowy.icns`
+From the `.iconset` folder (run on macOS):
+
+```sh
+iconutil -c icns ./icon-sources/macos.iconset -o ./flowy.icns
+```

js/desktop/src/hooks/use-stream-autoplay.ts

@@ -1,5 +1,5 @@
 import { useEffect, useRef } from "react";
-import beepSound from "../../assets/sound.wav";
+import beepSound from "../../assets/sounds/beep.wav";
 import type { Network, Particle, StreamProperties } from "@/api/types";
 import { apiClient } from "@/api/client";
 import { useAuthStore } from "@/stores/auth-store";