fix: keep compact recorder window during hotkey recording

[wslzzgdxh]

Summary

• Keep the main recorder window in compact mode when recording is triggered by Ctrl+Shift+Space.
• Only expand the compact window when the user clicks the compact icon.
• Add a green gradient/glow recording state for the compact icon.
• Hide toast notifications in compact mode to avoid overflow in the 96x96 window.

Verification

• pnpm run build:renderer
• node --check preload.js
• node --check src/helpers/ipcHandlers.js
• node --check src/helpers/windowManager.js

Manual checks

• Window shrinks after idle.
• Ctrl+Shift+Space starts recording without expanding the compact window.
• Compact icon shows green recording state.
• Toast messages do not overflow inside the compact window.
• Clicking the compact icon expands the main window.

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