fix: Fix overlap issue when creating multiple tables

[HassanBahati]

Description

When creating multiple tables in the diagram editor, new tables would overlap with existing ones because they were all positioned at the same fixed coordinates relative to the viewport center.

Brief summary of changes and motivation.
Implemented a smart positioning algorithm that automatically finds non-overlapping positions for new tables:

• Added utility function findNonOverlappingPosition that checks if the default position overlaps with existing nodes and uses a spiral positioning algorithm to find alternative non-overlapping positions. Falls back to placing tables far from existing nodes if needed.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update

Testing

• [] Tests added/updated
• All tests pass locally
• Tested on multiple browsers (Chrome, Firefox, Safari, Edge)

Test Environment:

• Browser:
• OS:

Checklist

• Code follows project style
• Self-reviewed code
• Updated documentation
• Backward compatible (or breaking change documented)
• No new warnings/errors

Additional Notes

Any extra context or screenshots.

[vercel]

@HassanBahati is attempting to deploy a commit to the Md Azizul Hakim's projects Team on Vercel.

A member of the Team first needs to authorize it.

[AHS12]

@HassanBahati Thanks, and Great job! This is indeed an issue, and your PR looks good, just some things to confirm before I approve this PR

1. I've created Issue [Bug]: Creating a new table form dialog/menu/shortcut overlap with each other and not showing in editor #23 to track this.
2. We have another feature allowing users to create a table from the right-click context menu. It uses a separate function, but please ensure your change doesn't impact that feature.
3. Since users can work on any part of the diagram, can you confirm that new tables are being created within the viewport area?
4. If the viewport area is crowded, will it default to overlap?

Again, thank you for your contribution. I really appreciate it

[vercel]

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Project	Deployment	Actions	Updated (UTC)
thoth-blueprint	Canceled	Comment	Mar 22, 2026 6:17pm

[AHS12]

@HassanBahati Hi, any updates from your side? I’m working on #11 and will need this feature. If I don’t hear back from you, I’ll close the PR and use your logic as a base for my fix. Thanks!

[HassanBahati]

Hi @AHS12 , sorry been caught up late. Will resolve on here by tomorrow. Thanks!

[HassanBahati]

@AHS12 checkout the latest changes on here when you get a chance.

[AHS12]

@HassanBahati Great job and thank you so much for paitently addressing my comments, I am merging your pr