Dataset Row Selection Export + Dataset Refresh Reliability Fixes

[urugondavishnu]

Summary

Improve the dataset detail experience by:

• supporting export of selected rows only
• fixing intermittent dataset refresh/load failures on owned datasets

Problems

1. Export currently ignores row selection

The dataset table already supports row selection via checkboxes, but:

• Export CSV
• Export XLSX

currently export the entire dataset instead of only selected rows.

Users should be able to:

• select specific rows
• export only those rows
• preserve column headers/attribute names in the exported file

2. Intermittent "Dataset not found" runtime error

Refreshing owned dataset pages sometimes throws:

• Dataset not found
• Convex query runtime error
• Next.js runtime overlay

But clicking "Retry" successfully loads the dataset afterward.

This suggests a race/timing/hydration/query consistency issue in the dataset page loading flow.

The current UX is confusing because:

• the dataset actually exists
• retry succeeds
• but the initial render fails noisily

Scope

Selected-row export support

Implement selected-row-only export behavior for:

• CSV export
• XLSX export

Requirements:

• if rows are selected → export only selected rows
• if no rows selected → preserve current full-export behavior
• exported files must include column/attribute names
• preserve current export UX/buttons where possible
• maintain clean behavior in dark/light mode

Dataset refresh reliability

Investigate and fix the intermittent:

• Dataset not found
• Convex query hydration/runtime issue

Focus on:

• query timing
• initial render behavior
• transient loading states
• retry consistency
• route/data synchronization
• useQuery lifecycle behavior

The page should:

• fail gracefully
• avoid noisy runtime overlays for recoverable states
• handle temporary unavailable/loading states correctly

Deliverables

• selected-row CSV export
• selected-row XLSX export
• reliable dataset refresh behavior
• cleaner loading/error handling
• preserved table selection UX

[coderabbitai]

🔗 Related PRs

#9 - Build sample UI, Replace Better Auth + Postgres with Clerk + Convex [merged]
#15 - Public datasets, authorization, analytics, and exports [merged]

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[urugondavishnu]

added selected-row CSV/XLSX export support, and fixed the intermittent dataset refresh/runtime query issue with improved loading/error handling.