fix(router-core): preserve context during reloads (#8130)

* fix(router-core): preserve context during reloads

* ci: apply automated fixes

* test(router): consolidate issue 8115 coverage

* fix(vue-router): react to provider context changes

* fix(router-core): refine context reconstruction

* bytes

* type fixes

* context + immediate UI on load

* coderabbit is happy

* no context in pending/error/notFound components

* changesets

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Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>