fix: add .catch() to promise chains

[saurabhhhcodes]

This fix improves error handling to prevent silent failures.

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[github-actions]

⚠️ PR Format Issues — @saurabhhhcodes

Please fix the following before your PR can be reviewed:

• ⚠️ No linked issue found. Add Closes #<issue-number> to your PR description.

Push new commits after fixing — this comment will update automatically.

📖 CONTRIBUTING.md

[github-actions]

👋 Thanks for your PR, @saurabhhhcodes!

Welcome to Reframe — a browser-based video editor built for everyone 🎬

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1. 🤖 Automated checks — build & TypeScript typecheck will run automatically
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Quick checklist

• PR title follows Conventional Commits (e.g. feat: add dark mode)
• Linked the issue this PR closes (e.g. Closes #123)
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[magic-peach]

Hi @saurabhhhcodes — thanks for all the fixes you've been sending to Reframe; several of them are genuinely useful and I want to get those merged.

I'm closing this one because its diff is identical to #1683, which you also have open. There are 34 open PRs from you containing this same one-line change under different titles, so I'm keeping #1683 and closing the rest — otherwise they'd all conflict with each other the moment one merges.

Going forward, could you please open one PR per distinct change, and link the issue it closes? A single PR that fixes five small things is much easier for me to review and merge than five PRs that fix the same one thing. Reviewing near-identical PRs is what's kept the queue from moving, and I'd rather spend that time on your substantive fixes.

Thanks — and please do keep contributing 🙏