dark mode for header in DE

[sakshigupta12feb]

Preview this branch

Problem TBD: When the Data Explorer iframe reloads (e.g., after changing database account or any value that triggers reload), the iframe loses its theme state and defaults to light mode. The header keeps its dark mode state but doesn't sync it back to the iframe.

Tried solution:
Added logic in HostedExplorer.tsx to:

Listen for the "ready" message that the iframe sends when it finishes loading
When the iframe is ready, send the current theme state from the header to the iframe

[

DEdarkmodeHeader.mp4

](url)

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