fix: truncate context logic

Plugins/ZShell/Llm/codehighlighter.hpp

@@ -37,10 +37,10 @@ class CodeHighlighter : public QObject {
 
 	private:
 	struct State {
-		bool bad = false; // permanent failure, do not retry
+		bool bad = false;
 		void* lib = nullptr;
-		const void* lang = nullptr; // const TSLanguage*
-		void* query = nullptr;		// TSQuery*
+		const void* lang = nullptr;
+		void* query = nullptr;
 	};
 
 	[[nodiscard]] static const QHash<QString, QString>& aliases();
@@ -59,15 +59,14 @@ class CodeHighlighter : public QObject {
 		const QVariantList& spans) const;
 
 	struct SpanCacheEntry {
-		QString code; // re-compared on lookup; a hash collision can
-					  // never deliver the wrong spans
+		QString code;
 		QVariantList spans;
 	};
 
 	mutable QHash<QString, std::shared_ptr<const State>> m_states;
 	mutable QMutex m_stateMutex;
 	mutable QHash<QString, SpanCacheEntry> m_spanCache;
-	mutable QStringList m_spanCacheOrder; // LRU order, oldest first
+	mutable QStringList m_spanCacheOrder;
 	mutable int m_spanCacheBytes = 0;
 	mutable QMutex m_cacheMutex;
 	static CodeHighlighter* s_instance;