Add `VoteProgressBar` Animation

[Marvell69]

Description: The VoteProgressBar needs a smooth fill animation when votes are tallied. Add CSS transition for the progress bar fill.

Requirements:

• 500ms fill animation
• Easing: ease-in-out
• Color transition for threshold crossing
• No animation on initial load (only updates)

Acceptance Criteria:

• Progress bar animates smoothly
• Color changes at threshold
• No janky animations
• Performance is good

[Lynndabel]

@Lynndabel has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello, I have carefully reviewed this issue description and acceptance criteria and will like to work on this please. ETA is 6hours. Please assign me this, thanks

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[Biokes]

@Biokes has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi miantainer,
I will like to fix this issue.

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[Johnjnr1]

@Johnjnr1 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi, I'd like to work on this issue! because I am very conversant with solving problems like this!

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[MethelyDev]

@MethelyDev has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer, i would like to work on this issue, kindly assign me

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Congratulations, @MethelyDev! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

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[grantfox-oss]

🦊 GrantFox — @MethelyDev has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #363)
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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign campaign!

@MethelyDev's PR #393 was approved and merged by @Levi-Ojukwu.

🏆 @MethelyDev: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (191 total points). Track your full progress on GrantFox.

👏 Great work, @MethelyDev! Keep contributing to Invoice-Liquidity-Network.

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This issue has been completed by @MethelyDev as part of the Stellar Wave Program's 6th Wave 🥳

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