fix: guard DOM geometry calls with isBrowser (#DS-5266)

[NikGurev]

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Pull request overview

This PR introduces SSR-safe DOM rectangle utility functions in @koobiq/components/core and replaces direct getClientRects() / getBoundingClientRect() usage in several components to avoid SSR runtime failures.

Changes:

• Added new SSR-safe wrappers kbqGetClientRects and kbqGetBoundingClientRect to core (including unit tests) and exported them via core public APIs.
• Updated tree/list option height calculations and other layout logic to use the new wrappers instead of inline SSR guards.
• Updated the public API guard snapshot to include the new exported functions.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tools/public_api_guard/components/core.api.md	Adds the new SSR utility functions to the public API snapshot.
packages/components/core/ssr/ssr.ts	Introduces SSR-safe wrappers for DOMRect access.
packages/components/core/ssr/ssr.spec.ts	Adds unit tests for the new SSR-safe wrappers.
packages/components/core/ssr/public-api.ts	Re-exports SSR utilities for package consumers.
packages/components/core/ssr/index.ts	Barrel export for the SSR subpackage.
packages/components/core/public-api.ts	Exposes the SSR utilities through the core public API.
packages/components/core/option/option.ts	Uses kbqGetClientRects for SSR-safe option height measurement.
packages/components/tree/tree-selection.component.ts	Uses kbqGetClientRects for SSR-safe height measurement.
packages/components/tree/tree-option.component.ts	Uses kbqGetClientRects for SSR-safe height measurement.
packages/components/list/list-selection.component.ts	Uses kbqGetClientRects for SSR-safe height measurement (list + option).
packages/components/navbar/navbar.component.ts	Uses kbqGetBoundingClientRect for SSR-safe width measurement.
packages/components/overflow-items/overflow-items.ts	Uses kbqGetBoundingClientRect for SSR-safe size computations.
packages/components/timezone/timezone-option.directive.ts	Uses kbqGetClientRects for SSR-safe tooltip row measurement.

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