Dynamic Shortcut Helper Height Auto-Adaptation

[markusressel]

This PR introduces dynamic height auto-adaptation for the TUI shortcut helper panel at the bottom of the interface. It ensures that all defined shortcuts are visible at all times, handling line wraps and terminal window resizing cleanly in a one-shot computation without clipping, entry splitting, or startup flickering.

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Features & Implementation Details

1. Custom Word-Wrapping Height Math

• Implemented a precise word-wrapping line counter (CalculateHeightForWidth) inside ShortcutMapComponent (shortcut_map_component.go) that operates on a slice of runes.
• Simulates word boundary wrap locations to calculate the exact height required for the shortcut text block in terminal cells.

2. Unbreakable Shortcut Entries (NBSP & Dental Click separators)

• To prevent keyboard key combos and action names from being split across line breaks (which looks messy and splits definition from label):
  • Spaces within each shortcut entry are replaced with Unicode Non-Breaking Spaces (\u00a0).
  • Vertical bars separating multiple key combos for a single action (e.g. ⭾|shift+⭾) are joined using the Unicode Latin Letter Dental Click (\u01c0 / ǀ), which renders identically to a vertical bar but is treated as an alphabetic character by the Unicode wrapping algorithm (UAX Bump github.com/spf13/viper from 1.17.0 to 1.18.0 #14).
  • Regular spaces are used exclusively between different entries, forcing wrap boundaries only at full shortcut entry units.

3. Flicker-Free Initial Sizing

• Retrieves the console dimensions directly from the OS on startup using golang.org/x/term (term.GetSize(int(os.Stdout.Fd()))) as a fallback if the layout hasn't been drawn yet.
• Resizes the shortcut map item in the parent Flex prior to the first draw loop, rendering the first frame perfectly with zero layout flickering.

4. Smooth Terminal Resize Support

• Overrides SetDrawFunc on the underlying text view to monitor real-time dimension shifts during terminal window resizes.
• If the layout width shifts and triggers wrapping adjustments, the parent Flex layout (mainPageLayout in main_page.go) is updated asynchronously using application.QueueUpdateDraw from a background goroutine, avoiding deadlocks or recursion during the draw loop.

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Validation

• Verified that all unit tests (go test ./...) compile and pass successfully.
• Manually tested that layout is stable across different window sizes and scales instantly without incremental sizing steps.