Verify Discovery API Search Integration

[Siddharthakhandelwal]

The UI is ready for searching (SearchPanel, DiscoveryTable, enter-to-search, filters, skeletons), but integration isn't fully confirmed to respond reliably to backend search endpoints.
Tasks/Acceptance Criteria:

• Verify that SearchPanel effectively queries the backend discovery API with filters (reviewed toggle, organism, max length).
• Render all returned results into the DiscoveryTable components.
• Ensure any error states for failed HTTP searches properly trigger the toast popup system for user visibility.