Rewrite navigation stack management

[IvanGoncharov]

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[github-actions]

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Pull request overview

This PR refactors the navigation stack management system from an ID-based approach to an object-reference-based approach. The navigation state is now represented as a linked list structure (NavStack) that directly holds GraphQL type objects and type graph references, eliminating the need for ID-to-object lookups throughout the codebase.

• Introduces NavStack type as a discriminated union for type list and type views
• Replaces GraphSelection with direct type object references in callbacks
• Updates all components to work with the new navigation model

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
webpack.config.ts	Removes optimization: { minimize: true } setting from standalone build configuration
src/graph/viewport.ts	Updates callbacks to use separate onSelectNode and onSelectEdge handlers; changes null checking from strict to loose equality
src/components/utils/SearchBox.tsx	Refactors to sync local state with external value prop; updates null handling for search values
src/components/settings/Settings.tsx	Adds undefined to typeGraph type to handle optional navigation stack
src/components/doc-explorer/TypeDoc.tsx	Updates onSelectEdge callback to include from/to type objects alongside edge ID
src/components/doc-explorer/OtherSearchResults.tsx	Adds null check for search value; updates callback signatures to match new pattern
src/components/doc-explorer/DocExplorer.tsx	Major refactoring to use NavStack instead of local state; simplifies navigation logic by consuming stack from props
src/components/Voyager.tsx	Core rewrite introducing NavStack type and management; implements new callback handlers for navigation, search, and selection
src/components/GraphViewport.tsx	Adapts to NavStack-based props; implements adapter functions to convert between string IDs and type objects for viewport callbacks

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