[FEATURE] Add Smooth Theme Transition Animation

[Rucha0901]

Summary

Improve the dark/light theme switching experience by adding smooth transition animations.

Contexts

The current theme switch changes abruptly, which feels visually inconsistent with the modern UI design.

Tasks

• Add transition animations for theme changes
• Animate background and text color updates
• Add icon transition effects
• Optimize transition performance

Acceptance Criteria

• Theme transitions occur smoothly
• No flickering during theme switch
• Animation performance remains stable
• UI consistency is maintained

Area

web

Difficulty

medium

[Rucha0901]

/assign under gssoc'26

[Jai-Shankar1033]

hey @ShantKhatri I'm a GSSoC'26 contributor and would love to work on it. Kindly assign it to me.

[Ruchira807]

Hi @Harxhit , I'd like to work on this issue under GSSoC'26. Please assign it to me.

[Harxhit]

@Ruchira807 I have assigned this issue to you please join our discord channel for readme.

[github-actions]

Hey @ShantKhatri (Project Admin) and @Harxhit (Maintainer),

This issue (previously assigned to @Ruchira807) has been automatically unassigned because no linked pull request was found within 5 days of assignment.

If work is in progress, please open and link a PR to keep the assignment active.

[Jai-Shankar1033]

hey @ShantKhatri I'm a GSSoC'26 contributor and would love to work on it. Kindly assign it to me.

[Harxhit]

@Jai-Shankar1033 I have assigned this issue to you.