supabase / supabase / 29002486524

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feat: add toggle for sensitive data visibility in table columns (#46180)

## Fixes

FE-2619

## What is the new behavior?

This PR adds support for marking table columns as sensitive and masking
their values in the grid view.

Sensitive columns:

- Display an 8-dot mask instead of the underlying value
- Remain masked across page refreshes
- Can be temporarily revealed for 5 seconds via the **Show data** action
- Display a warning when copying rows containing sensitive data

This helps prevent accidental exposure of sensitive information when
sharing screens, recording demos, or taking screenshots.

## Testing

- [x] Toggle sensitivity ON → save → refresh → remains masked
- [x] Toggle sensitivity OFF → save → refresh → remains unmasked
- [x] Toggle sensitivity multiple times → state remains consistent
- [x] Copy row with sensitive columns → warning shown
- [x] Click **Show data** → value revealed for 5 seconds then re-masked
- [x] Text, Boolean, Binary, JSON, and Foreign Key columns all display a
consistent 8-dot mask

### Test data

SQL fixture covering multiple PostgreSQL data types:

https://gist.github.com/monicakh/2485e9054bf21045912359871e9a1cb4. 

### UI

<img width="1284" height="554" alt="CleanShot 2026-06-09 at 12 01 33@2x"
src="https://github.com/user-attachments/assets/4aec0ba7-c874-42d7-9442-d2c704b319cc"
/>

<img width="1200" height="560" alt="CleanShot 2026-06-07 at 10 43 40@2x"
src="https://github.com/user-attachments/assets/b9569484-6fcc-47de-bc3d-881d0edc4060"
/>

The **Show data** action is only available for sensitive columns.

<img width="450" height="400" alt="CleanShot 2026-06-07 at 10 42 18@2x"
src="https://github.com/user-attachments/assets/d48849a2-ec0b-4522-a787-561a1d204ec9"
/>

Warnings on Copy command

<img width="450" height="80" alt="CleanShot 2026-06-09 at 11 58 42@2x"
src="https://github.com/user-attachments/assets/374e7d6b-b82a-4923-b035-2ec9b2f7bb7d"
/>

<img width="450" height="80" alt="CleanShot 2026-06-09 at 11 58... (continued)

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