feat: add unified response history session management across Claude, Gemini, and OpenAI API backends

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

internal/httpapi/claude/stream_runtime_core.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 	"time"
 
+	"ds2api/internal/responsehistory"
 	"ds2api/internal/sse"
 	streamengine "ds2api/internal/stream"
 	"ds2api/internal/toolcall"
@@ -46,6 +47,7 @@ type claudeStreamRuntime struct {
 	textEmitted        bool
 	ended              bool
 	upstreamErr        string
+	history            *responsehistory.Session
 }
 
 func newClaudeStreamRuntime(
@@ -60,6 +62,7 @@ func newClaudeStreamRuntime(
 	toolNames []string,
 	toolsRaw any,
 	promptTokenText string,
+	history *responsehistory.Session,
 ) *claudeStreamRuntime {
 	return &claudeStreamRuntime{
 		w:                     w,
@@ -74,6 +77,7 @@ func newClaudeStreamRuntime(
 		toolNames:             toolNames,
 		toolsRaw:              toolsRaw,
 		promptTokenText:       promptTokenText,
+		history:               history,
 		messageID:             fmt.Sprintf("msg_%d", time.Now().UnixNano()),
 		thinkingBlockIndex:    -1,
 		textBlockIndex:        -1,
@@ -232,5 +236,11 @@ func (s *claudeStreamRuntime) onParsed(parsed sse.LineResult) streamengine.Parse
 		}
 	}
 
+	if s.history != nil {
+		s.history.Progress(
+			responsehistory.ThinkingForArchive(s.rawThinking.String(), s.toolDetectionThinking.String(), s.thinking.String()),
+			responsehistory.TextForArchive(s.rawText.String(), s.text.String()),
+		)
+	}
 	return streamengine.ParsedDecision{ContentSeen: contentSeen}
 }