feat(logging): capture frontend errors to disk with structured redaction

Frontend half of the logging overhaul.

Capture:
- Add a global error boundary plus window error/unhandledrejection
  handlers that persist renderer errors via tauri-plugin-log (new
  @tauri-apps/plugin-log dependency + log:default capability), so a
  white-screen crash leaves a trace.

Redaction (two layers over every logged value):
- Structured serializer: redact by sensitive property name (arrays and
  nested values included) and by opaque value shape.
- Text layer, the universal final pass: redact URL credentials/query,
  auth schemes, known secret shapes, and named-key array/object values.
  The container rule closes prefix+JSON, double-encoded, and POJO-error
  bypasses regardless of which entrypoint the structured data came from.
- Render Errors as redacted message + native stack across V8 and WebKit
  (macOS/Linux) without depending on a single stack format.
- Bound all inputs and drop oversized JSON to keep the UI responsive.

i18n:
- zh / en / ja / zh-TW for the new log settings and error text.

package.json

@@ -70,6 +70,7 @@
     "@tanstack/react-virtual": "^3.13.23",
     "@tauri-apps/api": "^2.8.0",
     "@tauri-apps/plugin-dialog": "^2.4.0",
+    "@tauri-apps/plugin-log": "2.8.0",
     "@tauri-apps/plugin-process": "^2.0.0",
     "@tauri-apps/plugin-store": "^2.0.0",
     "@tauri-apps/plugin-updater": "^2.0.0",