Let the inspector panel resize freely

[datlechin]

What

Removes the fixed 400pt max-width cap on the right inspector panel so it can be resized freely by dragging its divider.

Why

The inspector was hard-capped between 270 and 400 points. Users with wider content (long values, AI chat) couldn't widen it past 400.

Changes

• MainSplitViewController: dropped inspectorSplitItem.maximumThickness = 400. The default is NSSplitViewItemUnspecifiedDimension, so there is no upper bound now.
• Kept minimumThickness = 270 so the panel can't shrink to an unusable width.
• No effect on window min-size logic: recomputeWindowMinSize() only reads minimums.
• The divider drag and existing autosaveName ("com.TablePro.mainSplit") persist the chosen width across launches.

Notes

The CHANGELOG entry for this already landed on main via #1674, so it's not repeated here.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Explicitly clear the inspector maximum thickness

Because this item is created with NSSplitViewItem(inspectorWithViewController:), AppKit initializes the inspector pane with the standard inspector min/max width of 270 points and makes it non-resizable by default. This patch removes the old maximumThickness = 400 override but only reassigns minimumThickness, so in windows using this controller the inspector will clamp back to 270 instead of becoming freely resizable; set maximumThickness explicitly to an unbounded/unspecified value after creating the inspector item.

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