[Bug]: Fix run_config_deltas Layout Overflow

[tomvothecoder]

Summary

Fix layout instability and horizontal overflow in the run_config_deltas display.

UI bugfix only.

Motivation

Long configuration values cause:

• Horizontal scrolling
• Card overflow
• Layout breakage

This impacts usability and readability.

Screenshot:

Scope

Stabilize rendering of configuration deltas:

Preferred:

• Truncate long values with ellipsis
• Show full value in tooltip

Alternative:

• Proper word wrapping without layout breakage

Requirements:

• No horizontal overflow
• Stable rendering for long keys and values
• No regression to existing diff logic

Non-Goals

• No changes to diff computation
• No backend changes
• No schema changes
• No visual redesign beyond overflow fix