Exclude command output panels from log find

[lynnswap]

Purpose

Exclude command output panel contents from the log view find target so searches only match visible log text, while keeping command output titles searchable.

Changes

• Removed command output panel supplemental text from the log finder mapping.
• Kept active find snapshots mapped during command output panel replacements and streaming updates.
• Updated regression coverage for hidden command output text, visible command titles, and active find snapshot mapping.

Testing

• swift test --build-system swiftbuild --no-parallel --filter commandOutputRendersCollapsedTextKitPanelAndExpandsInline
• swift test --build-system swiftbuild --no-parallel --filter expandingCommandOutputKeepsPanelTextOutOfActiveFindSnapshot
• swift test --build-system swiftbuild --no-parallel --filter collapsedCommandOutputFinderSupplementSignatureIgnoresHiddenOutputContent
• swift test --build-system swiftbuild --no-parallel
• xcodebuild test -project Tools/ReviewMonitor/CodexReviewMonitor.xcodeproj -scheme CodexReviewMonitor -destination 'platform=macOS,arch=arm64' CODE_SIGNING_ALLOWED=NO CODE_SIGNING_REQUIRED=NO
• codex-review --base main clean, findingCount: 0