fix: queue manual review when auto review is in progress

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Description

Manual ThinkReview clicks were ignored while isReviewInProgress was true, including during auto-review patch fetch and autoReviewDecisionMaker. If auto then skipped the cloud call, reviewPatchCode_1_1 never ran for the user.

Solution

Queue pending manual requests and flush them in fetchAndDisplayCodeReview finally; allow toggleReviewPanel to invoke fetch while busy; clear pending on PR navigation.

Related PR

Fixes #240