Display real column types in data tables #17

Feature description

Add display of actual column types (e.g., INT, VARCHAR, DATE) directly in the data tables.

Use case / motivation

When working with databases, it’s often necessary to know the data type of columns to write queries correctly and avoid type errors.

Suggested implementation

• Display a small label or text next to the column name in the table (e.g., id INT, name VARCHAR(255)).
• On hover, show a tooltip with full information about the column type, constraints (NOT NULL, DEFAULT, PRIMARY KEY).
• Extend the API endpoint that returns table data to include column types.
• Provide a UI toggle “Show column types” so users can enable or disable this display.

Examples / references

pgAdmin displays column data types when viewing table structure.