fix(tui): align tab mouse hitboxes with rendered labels

[jeongjin0]

Summary

Fixes a TUI tab mouse hitbox alignment bug where clicking directly on the visible Daily tab label could activate the tab to its left, requiring users to click farther right than the rendered label.

The header previously rebuilt tab click areas with a hard-coded horizontal offset (area.x + 12) while Ratatui renders Tabs inside the bordered block's inner area. The registered mouse hitboxes now follow the same geometry as the rendered tab strip: block inner area, left/right tab padding, rendered label width, and the custom " │ " divider.

Changes

• Replaced the hard-coded tab click-area start offset with Ratatui-aligned tab geometry.
• Reused a single tab-label helper for rendered labels and hitbox width calculation.
• Added regression coverage for clicking the rendered Daily label in the normal tab layout.
• Added regression coverage for clicking the rendered Day short label in the very-narrow tab layout.

Verification

• cargo fmt --check
• cargo check -p tokscale-cli
• cargo test -p tokscale-cli daily_label_click_uses_rendered_normal_tab_position
• cargo test -p tokscale-cli daily_short_label_click_uses_rendered_very_narrow_tab_position
• cargo test -p tokscale-cli
• git diff --check

Manual QA

• Ran cargo run -p tokscale-cli -- tui
• Clicked directly on the visible Daily tab label and confirmed it switches to Daily without needing to click to the right of the label.

CI Notes

This touches crates/tokscale-cli/**, so the native CLI build workflow is expected to run. The broader Rust CI may also run workspace formatting, clippy, and tests.

---

Summary by cubic

Fixes TUI tab hitboxes so clicking directly on a label selects the correct tab. Click areas now match the rendered ratatui Tabs geometry, removing the rightward offset.

• Bug Fixes
  • Compute click areas from the block’s inner area, label width, left/right padding, and the " │ " divider.
  • Reuse one tab-label helper for rendering and hitbox width.
  • Add regression tests for normal and very narrow layouts (clicking "Daily").

^{Written for commit 059b216. Summary will update on new commits. Review in cubic}

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
tokscale	Ignored	Preview	May 20, 2026 6:05am

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}

[junhoyeo]

Thanks a lot!

[junhoyeo]

@jeongjin0 this has been merged to v3.0.0: https://github.com/junhoyeo/tokscale/releases/tag/v3.0.0 thanks for the contribution!