fix: make TopNavbar sticky on scroll

[ankitkr104]

The navbar had no sticky/fixed positioning, so it scrolled away with the page content — making nav links, the wallet connector, and theme toggle completely inaccessible mid-page. and the elements of navbar this ([Reactor],[Swap],[History],[Docs]) are not in center. so, i fix it in center

Addressed Issues:

Fixes #137

Recordings:

Gold.mp4

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Summary by CodeRabbit

• Style
  • Navigation bar now remains fixed at the top of the page when scrolling, improving accessibility and usability.

[coderabbitai]

Walkthrough

The TopNavbar component was updated to remain visible during page scrolling by applying sticky positioning (top-0 z-50), and its internal flex containers were adjusted to distribute space appropriately using flex-1 and justify-end properties.

Changes

Cohort / File(s)	Summary
TopNavbar Layout Fix src/lib/components/layout/TopNavbar.tsx	Added sticky positioning to navbar root container; updated left wrapper to use flex-1 for space distribution; updated right wrapper to use flex-1 and justify-end to align actions to the end.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested labels

Typescript Lang

Poem

🐰 The navbar now sticks like a dream,
No more scrolling off-screen!
Sticky and true, with space-distribution flow,
Users can navigate high and low. ✨

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'fix: make TopNavbar sticky on scroll' directly and clearly summarizes the main change: adding sticky positioning to the TopNavbar component.
Linked Issues check	✅ Passed	The changes implement the core requirement from issue #137: adding sticky positioning to TopNavbar so it remains visible during page scrolling, directly addressing the reported bug.
Out of Scope Changes check	✅ Passed	All changes are narrowly scoped to making TopNavbar sticky with proper flex layout adjustments; no unrelated modifications are present.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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