feat: improve webview url viewer resizing

[hanklee9820]

Summary

• add a full URL panel below the Webview list
• support viewing long URLs with wrapping and vertical scrolling
• support dragging to resize the URL panel height
• keep copy action for the selected URL

Details

Previously, long URLs in the Webview panel were hard to view and copy completely.

This change keeps the Webview list compact, and adds a resizable detail panel at the bottom so users can:

• view the full URL
• drag to adjust the panel height
• scroll vertically to inspect the whole content
• copy the selected URL more easily

Preview Build

Preview packages are attached in a release on my fork for easier verification.

Included packages:

• macOS arm64
• macOS x64
• Windows x64

Verification

• npx eslint src/renderer/main/components/webview/Webview.tsx
• npm run build:renderer
• npm run build
• npm run pack

Notes

• version bump and changelog update can be handled by the maintainer during release

[hanklee9820]