diff --git a/internal/admin/handler.go b/internal/admin/handler.go
index 9c67492..b81378f 100644
--- a/internal/admin/handler.go
+++ b/internal/admin/handler.go
@@ -36,6 +36,8 @@ func RegisterRoutes(r chi.Router, h *Handler) {
 		pr.Post("/import", h.batchImport)
 		pr.Post("/test", h.testAPI)
 		pr.Post("/dev/raw-samples/capture", h.captureRawSample)
+		pr.Get("/dev/raw-samples/query", h.queryRawSampleCaptures)
+		pr.Post("/dev/raw-samples/save", h.saveRawSampleFromCaptures)
 		pr.Post("/vercel/sync", h.syncVercel)
 		pr.Get("/vercel/status", h.vercelStatus)
 		pr.Post("/vercel/status", h.vercelStatus)
diff --git a/internal/admin/handler_raw_samples.go b/internal/admin/handler_raw_samples.go
index 76ce638..4bf85a8 100644
--- a/internal/admin/handler_raw_samples.go
+++ b/internal/admin/handler_raw_samples.go
@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"net/url"
+	"sort"
 	"strings"
 
 	"ds2api/internal/config"
@@ -15,6 +16,11 @@ import (
 	"ds2api/internal/rawsample"
 )
 
+type captureChain struct {
+	Key     string
+	Entries []devcapture.Entry
+}
+
 func (h *Handler) captureRawSample(w http.ResponseWriter, r *http.Request) {
 	if h.OpenAI == nil {
 		writeJSON(w, http.StatusInternalServerError, map[string]any{"detail": "OpenAI handler is not configured"})
@@ -231,3 +237,310 @@ func cloneMap(in map[string]any) map[string]any {
 	}
 	return out
 }
+
+func (h *Handler) queryRawSampleCaptures(w http.ResponseWriter, r *http.Request) {
+	query := strings.TrimSpace(r.URL.Query().Get("q"))
+	limit := intFromQuery(r, "limit", 20)
+	if limit <= 0 {
+		limit = 20
+	}
+	if limit > 50 {
+		limit = 50
+	}
+
+	chains := buildCaptureChains(devcapture.Global().Snapshot())
+	items := make([]map[string]any, 0, len(chains))
+	for _, chain := range chains {
+		if query != "" && !captureChainMatchesQuery(chain, query) {
+			continue
+		}
+		items = append(items, buildCaptureChainQueryItem(chain, query))
+		if len(items) >= limit {
+			break
+		}
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"query": query,
+		"limit": limit,
+		"count": len(items),
+		"items": items,
+	})
+}
+
+func (h *Handler) saveRawSampleFromCaptures(w http.ResponseWriter, r *http.Request) {
+	var req map[string]any
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeJSON(w, http.StatusBadRequest, map[string]any{"detail": "invalid json"})
+		return
+	}
+
+	snapshot := devcapture.Global().Snapshot()
+	if len(snapshot) == 0 {
+		writeJSON(w, http.StatusBadRequest, map[string]any{"detail": "no capture logs available"})
+		return
+	}
+
+	chain, err := resolveCaptureChainSelection(snapshot, req)
+	if err != nil {
+		writeJSON(w, http.StatusBadRequest, map[string]any{"detail": err.Error()})
+		return
+	}
+
+	sampleID := strings.TrimSpace(fieldString(req, "sample_id"))
+	source := strings.TrimSpace(fieldString(req, "source"))
+	if source == "" {
+		source = "admin/dev/raw-samples/save"
+	}
+	requestPayload := captureChainRequestPayload(chain)
+
+	saved, err := rawsample.Persist(rawsample.PersistOptions{
+		RootDir:      config.RawStreamSampleRoot(),
+		SampleID:     sampleID,
+		Source:       source,
+		Request:      requestPayload,
+		Capture:      captureSummaryFromEntries(chain.Entries),
+		UpstreamBody: combineCaptureBodies(chain.Entries),
+	})
+	if err != nil {
+		writeJSON(w, http.StatusInternalServerError, map[string]any{"detail": err.Error()})
+		return
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"success":       true,
+		"sample_id":     saved.SampleID,
+		"sample_dir":    saved.Dir,
+		"meta_path":     saved.MetaPath,
+		"upstream_path": saved.UpstreamPath,
+		"chain_key":     chain.Key,
+		"capture_ids":   captureChainIDs(chain),
+		"round_count":   len(chain.Entries),
+	})
+}
+
+func buildCaptureChains(snapshot []devcapture.Entry) []captureChain {
+	if len(snapshot) == 0 {
+		return nil
+	}
+	ordered := make([]devcapture.Entry, len(snapshot))
+	copy(ordered, snapshot)
+	sort.SliceStable(ordered, func(i, j int) bool {
+		if ordered[i].CreatedAt == ordered[j].CreatedAt {
+			return ordered[i].ID < ordered[j].ID
+		}
+		return ordered[i].CreatedAt < ordered[j].CreatedAt
+	})
+
+	byKey := make(map[string]*captureChain, len(ordered))
+	keys := make([]string, 0, len(ordered))
+	for _, entry := range ordered {
+		key := captureChainKey(entry)
+		if key == "" {
+			key = "capture:" + entry.ID
+		}
+		if _, ok := byKey[key]; !ok {
+			byKey[key] = &captureChain{Key: key}
+			keys = append(keys, key)
+		}
+		byKey[key].Entries = append(byKey[key].Entries, entry)
+	}
+
+	chains := make([]captureChain, 0, len(keys))
+	for _, key := range keys {
+		chains = append(chains, *byKey[key])
+	}
+	sort.SliceStable(chains, func(i, j int) bool {
+		return latestCreatedAt(chains[i]) > latestCreatedAt(chains[j])
+	})
+	return chains
+}
+
+func captureChainKey(entry devcapture.Entry) string {
+	req := parseCaptureRequestBody(entry.RequestBody)
+	if sessionID := strings.TrimSpace(fieldString(req, "chat_session_id")); sessionID != "" {
+		return "session:" + sessionID
+	}
+	return "capture:" + entry.ID
+}
+
+func parseCaptureRequestBody(raw string) map[string]any {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return nil
+	}
+	var out map[string]any
+	if err := json.Unmarshal([]byte(raw), &out); err != nil {
+		return nil
+	}
+	return out
+}
+
+func latestCreatedAt(chain captureChain) int64 {
+	var latest int64
+	for _, entry := range chain.Entries {
+		if entry.CreatedAt > latest {
+			latest = entry.CreatedAt
+		}
+	}
+	return latest
+}
+
+func captureChainMatchesQuery(chain captureChain, query string) bool {
+	query = strings.ToLower(strings.TrimSpace(query))
+	if query == "" {
+		return true
+	}
+	for _, entry := range chain.Entries {
+		hay := strings.ToLower(strings.Join([]string{
+			entry.Label,
+			entry.URL,
+			entry.AccountID,
+			entry.RequestBody,
+			entry.ResponseBody,
+		}, "\n"))
+		if strings.Contains(hay, query) {
+			return true
+		}
+	}
+	return false
+}
+
+func buildCaptureChainQueryItem(chain captureChain, query string) map[string]any {
+	first := chain.Entries[0]
+	last := chain.Entries[len(chain.Entries)-1]
+	requestPreview := previewCaptureChainRequest(chain)
+	responsePreview := previewCaptureChainResponse(chain)
+
+	return map[string]any{
+		"chain_key":          chain.Key,
+		"capture_ids":        captureChainIDs(chain),
+		"created_at":         latestCreatedAt(chain),
+		"round_count":        len(chain.Entries),
+		"account_id":         nilIfEmpty(strings.TrimSpace(first.AccountID)),
+		"initial_label":      first.Label,
+		"initial_url":        first.URL,
+		"latest_label":       last.Label,
+		"latest_url":         last.URL,
+		"request_preview":    requestPreview,
+		"response_preview":   responsePreview,
+		"query":              query,
+		"response_truncated": captureChainHasTruncatedResponse(chain),
+	}
+}
+
+func captureChainIDs(chain captureChain) []string {
+	out := make([]string, 0, len(chain.Entries))
+	for _, entry := range chain.Entries {
+		out = append(out, entry.ID)
+	}
+	return out
+}
+
+func previewCaptureChainRequest(chain captureChain) string {
+	for _, entry := range chain.Entries {
+		req := parseCaptureRequestBody(entry.RequestBody)
+		if prompt := strings.TrimSpace(fieldString(req, "prompt")); prompt != "" {
+			return previewText(prompt, 280)
+		}
+		if messages, ok := req["messages"].([]any); ok {
+			var parts []string
+			for _, item := range messages {
+				m, _ := item.(map[string]any)
+				content := strings.TrimSpace(fieldString(m, "content"))
+				if content != "" {
+					parts = append(parts, content)
+				}
+			}
+			if len(parts) > 0 {
+				return previewText(strings.Join(parts, "\n"), 280)
+			}
+		}
+	}
+	return previewText(strings.TrimSpace(chain.Entries[0].RequestBody), 280)
+}
+
+func previewCaptureChainResponse(chain captureChain) string {
+	var b strings.Builder
+	for _, entry := range chain.Entries {
+		if b.Len() > 0 {
+			b.WriteByte('\n')
+		}
+		b.WriteString(strings.TrimSpace(entry.ResponseBody))
+		if b.Len() >= 280 {
+			break
+		}
+	}
+	return previewText(b.String(), 280)
+}
+
+func previewText(text string, limit int) string {
+	text = strings.TrimSpace(text)
+	if limit <= 0 || len(text) <= limit {
+		return text
+	}
+	return text[:limit] + "..."
+}
+
+func captureChainHasTruncatedResponse(chain captureChain) bool {
+	for _, entry := range chain.Entries {
+		if entry.ResponseTruncated {
+			return true
+		}
+	}
+	return false
+}
+
+func resolveCaptureChainSelection(snapshot []devcapture.Entry, req map[string]any) (captureChain, error) {
+	chains := buildCaptureChains(snapshot)
+	if len(chains) == 0 {
+		return captureChain{}, fmt.Errorf("no capture logs available")
+	}
+
+	if chainKey := strings.TrimSpace(fieldString(req, "chain_key")); chainKey != "" {
+		for _, chain := range chains {
+			if chain.Key == chainKey {
+				return chain, nil
+			}
+		}
+		return captureChain{}, fmt.Errorf("capture chain not found")
+	}
+
+	captureID := strings.TrimSpace(fieldString(req, "capture_id"))
+	if captureID == "" {
+		if ids, ok := toStringSlice(req["capture_ids"]); ok && len(ids) > 0 {
+			captureID = strings.TrimSpace(ids[0])
+		}
+	}
+	if captureID != "" {
+		for _, chain := range chains {
+			for _, entry := range chain.Entries {
+				if entry.ID == captureID {
+					return chain, nil
+				}
+			}
+		}
+		return captureChain{}, fmt.Errorf("capture id not found")
+	}
+
+	query := strings.TrimSpace(fieldString(req, "query"))
+	if query != "" {
+		for _, chain := range chains {
+			if captureChainMatchesQuery(chain, query) {
+				return chain, nil
+			}
+		}
+		return captureChain{}, fmt.Errorf("no capture chain matched query")
+	}
+
+	return captureChain{}, fmt.Errorf("capture_id, chain_key, or query is required")
+}
+
+func captureChainRequestPayload(chain captureChain) any {
+	for _, entry := range chain.Entries {
+		if req := parseCaptureRequestBody(entry.RequestBody); req != nil {
+			return req
+		}
+	}
+	return strings.TrimSpace(chain.Entries[0].RequestBody)
+}
diff --git a/internal/admin/handler_raw_samples_test.go b/internal/admin/handler_raw_samples_test.go
index 4566b70..fa15e45 100644
--- a/internal/admin/handler_raw_samples_test.go
+++ b/internal/admin/handler_raw_samples_test.go
@@ -230,3 +230,127 @@ func TestCombineCaptureBodiesPreservesOrderAndSeparators(t *testing.T) {
 		t.Fatalf("unexpected combined body: %q", string(got))
 	}
 }
+
+func TestQueryRawSampleCapturesGroupsBySessionAndMatchesQuestion(t *testing.T) {
+	devcapture.Global().Clear()
+	defer devcapture.Global().Clear()
+
+	recordCapturedResponse(
+		"deepseek_completion",
+		"https://chat.deepseek.com/api/v0/chat/completion",
+		http.StatusOK,
+		map[string]any{
+			"chat_session_id": "session-query-1",
+			"prompt":          "用户问题：广州天气怎么样？",
+		},
+		"data: {\"v\":\"先看天气\"}\n\n",
+	)
+	recordCapturedResponse(
+		"deepseek_continue",
+		"https://chat.deepseek.com/api/v0/chat/continue",
+		http.StatusOK,
+		map[string]any{
+			"chat_session_id": "session-query-1",
+			"message_id":      2,
+		},
+		"data: {\"v\":\"再补充一点\"}\n\n",
+	)
+
+	h := &Handler{}
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodGet, "/admin/dev/raw-samples/query?q=广州天气", nil)
+	h.queryRawSampleCaptures(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d body=%s", rec.Code, rec.Body.String())
+	}
+
+	var out map[string]any
+	if err := json.Unmarshal(rec.Body.Bytes(), &out); err != nil {
+		t.Fatalf("decode failed: %v", err)
+	}
+	items, _ := out["items"].([]any)
+	if len(items) != 1 {
+		t.Fatalf("expected 1 item, got %d body=%s", len(items), rec.Body.String())
+	}
+	item, _ := items[0].(map[string]any)
+	if item["chain_key"] != "session:session-query-1" {
+		t.Fatalf("unexpected chain key: %#v", item["chain_key"])
+	}
+	if int(item["round_count"].(float64)) != 2 {
+		t.Fatalf("expected 2 rounds, got %#v", item["round_count"])
+	}
+	reqPreview, _ := item["request_preview"].(string)
+	if !strings.Contains(reqPreview, "广州天气") {
+		t.Fatalf("expected request preview to contain query, got %q", reqPreview)
+	}
+}
+
+func TestSaveRawSampleFromCapturesPersistsSelectedChain(t *testing.T) {
+	root := t.TempDir()
+	t.Setenv("DS2API_RAW_STREAM_SAMPLE_ROOT", root)
+	devcapture.Global().Clear()
+	defer devcapture.Global().Clear()
+
+	recordCapturedResponse(
+		"deepseek_completion",
+		"https://chat.deepseek.com/api/v0/chat/completion",
+		http.StatusOK,
+		map[string]any{
+			"chat_session_id": "session-save-1",
+			"prompt":          "请回答深圳天气",
+		},
+		"data: {\"v\":\"第一段\"}\n\n",
+	)
+	recordCapturedResponse(
+		"deepseek_continue",
+		"https://chat.deepseek.com/api/v0/chat/continue",
+		http.StatusOK,
+		map[string]any{
+			"chat_session_id": "session-save-1",
+			"message_id":      2,
+		},
+		"data: {\"v\":\"第二段\"}\n\n",
+	)
+
+	h := &Handler{}
+	rec := httptest.NewRecorder()
+	reqBody := `{"query":"深圳天气","sample_id":"saved-from-memory"}`
+	req := httptest.NewRequest(http.MethodPost, "/admin/dev/raw-samples/save", strings.NewReader(reqBody))
+	h.saveRawSampleFromCaptures(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d body=%s", rec.Code, rec.Body.String())
+	}
+
+	var out map[string]any
+	if err := json.Unmarshal(rec.Body.Bytes(), &out); err != nil {
+		t.Fatalf("decode failed: %v", err)
+	}
+	if out["sample_id"] != "saved-from-memory" {
+		t.Fatalf("unexpected sample id: %#v", out["sample_id"])
+	}
+	if int(out["round_count"].(float64)) != 2 {
+		t.Fatalf("expected round_count=2, got %#v", out["round_count"])
+	}
+
+	sampleDir := filepath.Join(root, "saved-from-memory")
+	upstreamBytes, err := os.ReadFile(filepath.Join(sampleDir, "upstream.stream.sse"))
+	if err != nil {
+		t.Fatalf("read upstream: %v", err)
+	}
+	upstream := string(upstreamBytes)
+	if !strings.Contains(upstream, "第一段") || !strings.Contains(upstream, "第二段") {
+		t.Fatalf("expected combined upstream, got %q", upstream)
+	}
+	metaBytes, err := os.ReadFile(filepath.Join(sampleDir, "meta.json"))
+	if err != nil {
+		t.Fatalf("read meta: %v", err)
+	}
+	var meta map[string]any
+	if err := json.Unmarshal(metaBytes, &meta); err != nil {
+		t.Fatalf("decode meta: %v", err)
+	}
+	reqMeta, _ := meta["request"].(map[string]any)
+	if fieldString(reqMeta, "chat_session_id") != "session-save-1" {
+		t.Fatalf("expected request to come from selected chain, got %#v", meta["request"])
+	}
+}
diff --git a/internal/devcapture/store.go b/internal/devcapture/store.go
index 6d0d8cd..c5b3cec 100644
--- a/internal/devcapture/store.go
+++ b/internal/devcapture/store.go
@@ -14,8 +14,8 @@ import (
 )
 
 const (
-	defaultLimit        = 5
-	defaultMaxBodyBytes = 2 * 1024 * 1024
+	defaultLimit        = 20
+	defaultMaxBodyBytes = 5 * 1024 * 1024
 	maxLimit            = 50
 )
 
diff --git a/internal/devcapture/store_test.go b/internal/devcapture/store_test.go
index 1dd58b4..3bbbf2d 100644
--- a/internal/devcapture/store_test.go
+++ b/internal/devcapture/store_test.go
@@ -6,6 +6,35 @@ import (
 	"testing"
 )
 
+func TestNewFromEnvDefaults(t *testing.T) {
+	t.Setenv("DS2API_DEV_PACKET_CAPTURE_LIMIT", "")
+	t.Setenv("DS2API_DEV_PACKET_CAPTURE_MAX_BODY_BYTES", "")
+	t.Setenv("VERCEL", "")
+	t.Setenv("NOW_REGION", "")
+
+	s := NewFromEnv()
+	if s.Limit() != 20 {
+		t.Fatalf("expected default limit 20, got %d", s.Limit())
+	}
+	if s.MaxBodyBytes() != 5*1024*1024 {
+		t.Fatalf("expected default max body bytes 5MB, got %d", s.MaxBodyBytes())
+	}
+}
+
+func TestNewFromEnvHonorsOverrides(t *testing.T) {
+	t.Setenv("DS2API_DEV_PACKET_CAPTURE_LIMIT", "7")
+	t.Setenv("DS2API_DEV_PACKET_CAPTURE_MAX_BODY_BYTES", "8192")
+	t.Setenv("VERCEL", "")
+	t.Setenv("NOW_REGION", "")
+	s := NewFromEnv()
+	if s.Limit() != 7 {
+		t.Fatalf("expected override limit 7, got %d", s.Limit())
+	}
+	if s.MaxBodyBytes() != 8192 {
+		t.Fatalf("expected override max body bytes 8192, got %d", s.MaxBodyBytes())
+	}
+}
+
 func TestStorePushKeepsNewestWithinLimit(t *testing.T) {
 	s := &Store{enabled: true, limit: 2, maxBodyBytes: 1024}
 	for i := 0; i < 3; i++ {
diff --git a/webui/src/locales/en.json b/webui/src/locales/en.json
index 1047134..6aa6ca0 100644
--- a/webui/src/locales/en.json
+++ b/webui/src/locales/en.json
@@ -115,7 +115,7 @@
         "addAccount": "Add account",
         "testingAllAccounts": "Refreshing tokens for all accounts...",
         "sessionActive": "Session active",
-        "reauthRequired": "Re-auth required",
+        "reauthRequired": "Retest status required",
         "runtimeStatusUnknown": "Will be determined after sync",
         "testStatusFailed": "Last test failed",
         "noAccounts": "No accounts found.",
@@ -325,4 +325,4 @@
             "four": "Trigger a redeploy to apply the updated environment variables."
         }
     }
-}
+}
\ No newline at end of file
diff --git a/webui/src/locales/zh.json b/webui/src/locales/zh.json
index 11895c6..9dfc4e4 100644
--- a/webui/src/locales/zh.json
+++ b/webui/src/locales/zh.json
@@ -115,7 +115,7 @@
         "addAccount": "添加账号",
         "testingAllAccounts": "正在刷新所有账号 Token...",
         "sessionActive": "已建立会话",
-        "reauthRequired": "需重新登录",
+        "reauthRequired": "需重新测试状态",
         "runtimeStatusUnknown": "状态以同步后为准",
         "testStatusFailed": "上次测试失败",
         "noAccounts": "未找到任何账号",
@@ -325,4 +325,4 @@
             "four": "触发重新部署以应用新的环境变量。"
         }
     }
-}
+}
\ No newline at end of file