Support multi-segment navigation with new UI

[Tech-lo]

Parent Issue: OpenPecha/WeBuddhist-app#163

Implement multi-segment navigation and highlight support in the Studio frontend, matching the updated UI design.

UI Reference: Figma – WeBuddhist Studio

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• Implementation

[palden4]

in progress

[palden4]

in progress

[palden4]

sync with evan and tamdin

[tentamdin]

SP-2

[tentamdin]

UI and api integration is done and left with functions

[Tech-lo]

All the major implementations updated, currently, small tweaks of ui changes to do, as after implementation and integration, ui isn't completely smooth.

[tentamdin]

few small UI fixes to do

[tentamdin]

fix scrollbar issue in UI

[TenzDelek]

done under #161