feat: unify logging via electron-log and add IPC error boundary

Bug reports from Steam Deck (Flatpak) arrived without any useful context:
no terminal, no log file, no trace of what failed. Silent catches in
helixClient hid quota and token errors entirely. IPC handler exceptions
reached the renderer as rejected promises with no server-side record.

electron-log now writes to a rotating log file (~1 MB, 5 files) that
users can attach to bug reports. All IPC handlers are wrapped in
safeHandle, which logs and re-throws at the boundary. Optional-feature
failures (chapters, profile images, viewer counts) emit log.warn with
enough context to diagnose. A React ErrorBoundary catches render crashes
app-wide and logs them before showing a reload prompt.

package-lock.json

@@ -1,15 +1,16 @@
 {
   "name": "twitch4steamdeck",
-  "version": "0.3.4",
+  "version": "0.4.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "twitch4steamdeck",
-      "version": "0.3.4",
+      "version": "0.4.5",
       "license": "MIT",
       "dependencies": {
         "better-sqlite3": "^12.8.0",
+        "electron-log": "^5.4.4",
         "hls.js": "^1.6.16",
         "qrcode": "^1.5.4",
         "react": "^18.3.1",
@@ -4237,6 +4238,15 @@
         "node": ">= 10.0.0"
       }
     },
+    "node_modules/electron-log": {
+      "version": "5.4.4",
+      "resolved": "https://registry.npmjs.org/electron-log/-/electron-log-5.4.4.tgz",
+      "integrity": "sha512-istWgaXjBfURBSS8LWVW9C3jsc6+ac+tY1lXrQEOTp0lVj+a4OlO1Tmqb36GgnEUDv92DGC9VI1HNXwJinWpgA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 14"
+      }
+    },
     "node_modules/electron-publish": {
       "version": "25.1.7",
       "resolved": "https://registry.npmjs.org/electron-publish/-/electron-publish-25.1.7.tgz",