Add keyboard shortcuts for Analyze, Clear, and Toggle Theme

[imDarshanGK]

Add common keyboard shortcuts (Ctrl/Cmd+Enter to Analyze, Ctrl/Cmd+L to Clear, Ctrl/Cmd+T to toggle theme) and document them in the UI.

[Neelr1912]

/assign gssoc
I’m planning to implement keyboard shortcuts for better accessibility and productivity:

Ctrl/Cmd + Enter → Analyze
Ctrl/Cmd + L → Clear
Ctrl/Cmd + T → Toggle Theme

I’ll also add proper UI documentation/tooltips so users can easily discover and use these shortcuts across the application.

Please assign this issue to me if it’s available.

[Mayukh-Jain]

Hi @imDarshanGK ,👋 I’m a GSSoC 2026 contributor and would like to work on this issue.
Please assign this issue to me .