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>

src-tauri/tauri.conf.json

@@ -1,7 +1,8 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
-  "productName": "exbyte-depot",
-  "version": "0.2.3",
+  "productName": "Exbyte Depot",
+  "mainBinaryName": "Exbyte Depot",
+  "version": "0.2.4",
   "identifier": "com.bonchellon.exbyte-depot",
   "build": {
     "beforeDevCommand": "npm run dev",