Render TUI panels in two‑column layout

[theokeist]

Motivation

• Make the serve command TUI use the full terminal width by arranging panels side‑by‑side so related info (status, traffic, performance, logs) appears as a dashboard rather than a long vertical list.
• Address alignment/overflow issues so paired boxes stay visually consistent across different panel heights.

Description

• Reworked src/Console/Commands/ServeCommand.php to render panels in two‑column rows using a new renderTuiPanelRow(...) helper instead of many independent renderTuiPanel(...) calls, and adjusted the panel ordering to improve readability.
• Introduced buildTuiPanelLines(...), padPanelLines(...) and a padded renderTuiPanel(...) implementation so each box is produced as a list of lines and can be aligned and merged into rows reliably.
• Kept existing coloring and width/padding logic but centralized string building and color stripping via padStrip(...) and stripColors(...) to avoid misalignment from ANSI codes.
• Minor layout and copy tweaks (panel titles, placeholders) to match the new two‑column presentation and keep the existing TUI controls/usage hints.

Testing

• No automated tests were executed for this change.

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