fix: preserve filename input and add macOS voice diagnostics

[Go1c]

Summary

• Preserve raw file and folder rename input while editing, then sanitize whitespace on commit.
• Add macOS Doubao voice input diagnostic probes and collector scripts.
• Add Wry keyDown diagnostic tooling and comparison helpers for Tauri/WKWebView input event investigation.

Bug Fix Context

This addresses the NoteGen-side filename input mutation issue found while investigating macOS Doubao voice input. The remaining Doubao failure was localized with manual evidence to Tauri/WKWebView native input event bridging: the same pure HTML probe receives composition/input events in a browser, while the Tauri/WKWebView probe receives only focus events.

Test Plan

• node --test scripts/run-doubao-input-experiment.spec.mjs scripts/compare-doubao-input-logs.spec.mjs scripts/doubao-input-collector.spec.mjs scripts/diagnose-wry-keydown.spec.mjs src/app/core/main/file/file-name-input.spec.mjs public/doubao-input-debug.spec.mjs
• pnpm exec tsc --noEmit --pretty false
• git diff --check