fix(context): expose history tokens and remove leaked state files

Address remaining review feedback: 1) Add HistoryTokens field to ContextUsage/ContextStats, showing history-only token count in /context and frontend UI alongside SummarizeAtTokens so users can see the actual summarization trigger comparison. 2) Remove .codebuddy/github-contribute/ state files accidentally included in the PR.

pkg/commands/cmd_context.go

@@ -30,11 +30,12 @@ func formatContextStats(s *ContextStats) string {
 	}
 	usedWindowPercent := s.UsedTokens * 100 / max(s.TotalTokens, 1)
 	msg := fmt.Sprintf(
-		"Context usage  \nMessages: %d  \nUsed: ~%d / %d tokens (%d%%)  \nCompress at: %d tokens  \nSummarize at: %d tokens  \nCompression progress: %d%%  \nRemaining: ~%d tokens",
+		"Context usage  \nMessages: %d  \nUsed: ~%d / %d tokens (%d%%)  \nHistory: ~%d tokens  \nCompress at: %d tokens  \nSummarize at: %d tokens  \nCompression progress: %d%%  \nRemaining: ~%d tokens",
 		s.MessageCount,
 		s.UsedTokens,
 		s.TotalTokens,
 		usedWindowPercent,
+		s.HistoryTokens,
 		s.CompressAtTokens,
 		s.SummarizeAtTokens,
 		s.UsedPercent,

pkg/commands/runtime.go

@@ -31,6 +31,7 @@ type MCPToolInfo struct {
 type ContextStats struct {
 	UsedTokens        int
 	TotalTokens       int // model context window
+	HistoryTokens     int // history-only tokens (what maybeSummarize checks)
 	CompressAtTokens  int // hard budget compression threshold
 	SummarizeAtTokens int // soft summarization trigger
 	UsedPercent       int // 0-100