Prevent query to overflow table

[javuto]

• Use the correct field to display when a node was LastSeen
• Prevent query to overflow the table
• Some random formatting changes

[Copilot]

Pull Request Overview

This PR fixes display issues in the admin interface by correcting the LastSeen field usage and preventing query text from overflowing table layouts.

• Corrected LastSeen field to use n.LastSeen instead of n.UpdatedAt in JSON responses
• Added CSS styling and HTML wrapping to prevent query text from overflowing tables
• Applied minor formatting improvements to CSS with consistent quote usage and spacing

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pkg/nodes/nodes.go	Removed extra blank line for formatting consistency
cmd/admin/templates/queries.html	Added div wrapper with styling to prevent query text overflow and condensed template variables
cmd/admin/templates/queries-logs.html	Replaced inline styles with CSS class for query display
cmd/admin/static/css/custom.css	Added new CSS classes for query styling and standardized quote usage/formatting
cmd/admin/handlers/json-nodes.go	Fixed LastSeen field to use correct timestamp source

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