0.2.4 — fix code-editor white screen, rename package to "Exbyte Depot"

- Fix critical crash: opening the built-in code editor blanked the whole app
  (white screen). The editing early-return sat above the syntax-highlight
  useMemo, so entering edit mode changed the hook count and React tore down the
  tree (Rules of Hooks violation). Moved all hooks above the early returns.
- Diff-vs-previous button is now shown only for text/code files, not binaries
  (p4 diff2 on a .uasset only prints "files differ", which is useless).
- Package renamed to "Exbyte Depot" (productName + mainBinaryName); identifier
  unchanged so existing installs upgrade in place.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "exbyte-depot",
   "private": true,
-  "version": "0.2.3",
+  "version": "0.2.4",
   "type": "module",
   "scripts": {
     "dev": "vite",