feat(auto): AUTO-only priority chain with tiered slots + live source probing; CSV export w/ key names; audit persistence; fix prompt token accounting & deepseek thinking

internal/config/config.go

@@ -121,9 +121,11 @@ func (c *Config) ApplyDefaults() error {
 
 // RuntimeConfig is the persisted web-UI editable slice (sources added/edited).
 type RuntimeConfig struct {
-	Sources []Source     `json:"sources"`
+	Sources         []Source     `json:"sources"`
-	Keys    []GWKey      `json:"keys,omitempty"`
+	DeletedSources  []string     `json:"deleted_sources,omitempty"`
-	Auto    []ModelScope `json:"auto,omitempty"`
+	DeletedAdapters []string     `json:"deleted_adapters,omitempty"`
+	Keys            []GWKey      `json:"keys,omitempty"`
+	Auto            []ModelScope `json:"auto,omitempty"`
 }
 
 // GWKey is a gateway API key persisted in the runtime store. Role is "admin"
@@ -144,6 +146,8 @@ type GWKey struct {
 // uses Hours as the window length in hours.
 type ModelScope struct {
 	Model      string `json:"model"`
+	Source     string `json:"source,omitempty"` // optional: pin to one upstream source; "" = any source
+	Tier       int    `json:"tier,omitempty"`
 	TokenQuota int64  `json:"token_quota"`
 	Period     string `json:"period,omitempty"`
 	Hours      int64  `json:"hours,omitempty"`
@@ -160,6 +164,8 @@ func (m *ModelScope) UnmarshalJSON(b []byte) error {
 	}
 	var o struct {
 		Model      string `json:"model"`
+		Source     string `json:"source"`
+		Tier       int    `json:"tier"`
 		TokenQuota int64  `json:"token_quota"`
 		Period     string `json:"period"`
 		Hours      int64  `json:"hours"`
@@ -168,6 +174,8 @@ func (m *ModelScope) UnmarshalJSON(b []byte) error {
 		return err
 	}
 	m.Model = o.Model
+	m.Source = o.Source
+	m.Tier = o.Tier
 	m.TokenQuota = o.TokenQuota
 	m.Period = o.Period
 	m.Hours = o.Hours

internal/config/store.go

@@ -49,14 +49,16 @@ func (s *Store) Upsert(src Source) error {
 	for i := range s.data.Sources {
 		if s.data.Sources[i].Name == src.Name {
 			s.data.Sources[i] = src
+			s.data.DeletedSources = removeString(s.data.DeletedSources, src.Name)
 			return s.persistLocked()
 		}
 	}
 	s.data.Sources = append(s.data.Sources, src)
+	s.data.DeletedSources = removeString(s.data.DeletedSources, src.Name)
 	return s.persistLocked()
 }
 
-// Remove deletes a runtime source and persists.
+// Remove deletes a runtime source or hides a base YAML source and persists.
 func (s *Store) Remove(name string) (bool, error) {
 	s.mu.Lock()
 	defer s.mu.Unlock()
@@ -69,11 +71,47 @@ func (s *Store) Remove(name string) (bool, error) {
 		}
 		kept = append(kept, src)
 	}
-	if !removed {
-		return false, nil
-	}
 	s.data.Sources = kept
-	return true, s.persistLocked()
+	if !containsString(s.data.DeletedSources, name) {
+		s.data.DeletedSources = append(s.data.DeletedSources, name)
+	}
+	return removed || containsString(s.data.DeletedSources, name), s.persistLocked()
+}
+
+func (s *Store) DeletedSources() map[string]bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := map[string]bool{}
+	for _, name := range s.data.DeletedSources {
+		out[name] = true
+	}
+	return out
+}
+
+func (s *Store) DeleteAdapter(name string) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if !containsString(s.data.DeletedAdapters, name) {
+		s.data.DeletedAdapters = append(s.data.DeletedAdapters, name)
+	}
+	return s.persistLocked()
+}
+
+func (s *Store) RestoreAdapter(name string) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.data.DeletedAdapters = removeString(s.data.DeletedAdapters, name)
+	return s.persistLocked()
+}
+
+func (s *Store) DeletedAdapters() map[string]bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := map[string]bool{}
+	for _, name := range s.data.DeletedAdapters {
+		out[name] = true
+	}
+	return out
 }
 
 func (s *Store) persistLocked() error {
@@ -84,6 +122,25 @@ func (s *Store) persistLocked() error {
 	return os.WriteFile(s.path, b, 0644)
 }
 
+func containsString(list []string, s string) bool {
+	for _, x := range list {
+		if x == s {
+			return true
+		}
+	}
+	return false
+}
+
+func removeString(list []string, s string) []string {
+	out := list[:0]
+	for _, x := range list {
+		if x != s {
+			out = append(out, x)
+		}
+	}
+	return out
+}
+
 // ListKeys returns the persisted gateway keys.
 func (s *Store) ListKeys() []GWKey {
 	s.mu.Lock()

internal/core/core.go

@@ -152,6 +152,7 @@ func (c *Core) FindKey(key string) (config.GWKey, bool) { return c.store.KeyByVa
 
 // CreateKey builds a new random gateway key and persists it.
 func (c *Core) CreateKey(name, role string, models []config.ModelScope, note string) (config.GWKey, error) {
+	models = cleanScopes(models)
 	key := make([]byte, 16)
 	if _, err := rand.Read(key); err != nil {
 		return config.GWKey{}, err
@@ -185,7 +186,7 @@ func (c *Core) UpdateKey(key, name, role string, models []config.ModelScope, not
 	if role == "admin" || role == "user" {
 		rec.Role = role
 	}
-	rec.Models = models
+	rec.Models = cleanScopes(models)
 	rec.Note = note
 	if err := c.store.SaveKey(rec); err != nil {
 		return config.GWKey{}, err
@@ -202,16 +203,23 @@ func (c *Core) DeleteKey(key string) (bool, error) { return c.store.DeleteKey(ke
 // highest priority).
 func (c *Core) AutoRules() []config.ModelScope { return c.store.AutoRules() }
 
-// SaveAutoRules persists the AUTO scheduling slots.
+func cleanScopes(entries []config.ModelScope) []config.ModelScope {
-func (c *Core) SaveAutoRules(entries []config.ModelScope) error {
 	clean := make([]config.ModelScope, 0, len(entries))
 	for _, e := range entries {
 		if e.Model == "" {
 			continue
 		}
+		if e.Source == "undefined" || e.Source == "null" {
+			e.Source = ""
+		}
 		clean = append(clean, e)
 	}
-	return c.store.SaveAutoRules(clean)
+	return clean
+}
+
+// SaveAutoRules persists the AUTO scheduling slots.
+func (c *Core) SaveAutoRules(entries []config.ModelScope) error {
+	return c.store.SaveAutoRules(cleanScopes(entries))
 }
 
 // Registry resolves model -> owning provider.
@@ -219,14 +227,24 @@ func (c *Core) ProviderForModel(model string) *provider.Provider {
 	return c.registry.ProviderForModel(model)
 }
 
+// ProviderForSlot resolves a (model, source) scheduling slot to a provider;
+// source "" falls back to ProviderForModel.
+func (c *Core) ProviderForSlot(model, source string) *provider.Provider {
+	return c.registry.ProviderForSlot(model, source)
+}
+
 // Config exposes the underlying configuration (read-only usage).
 func (c *Core) Config() *config.Config { return c.cfg }
 
 // mergedSources = base YAML sources + runtime sources (runtime wins by name).
 func (c *Core) mergedSources() []config.Source {
+	deleted := c.store.DeletedSources()
 	byName := map[string]config.Source{}
 	order := []string{}
 	for _, s := range c.cfg.Sources {
+		if deleted[s.Name] {
+			continue
+		}
 		byName[s.Name] = s
 		order = append(order, s.Name)
 	}
@@ -278,7 +296,17 @@ func (c *Core) Reload() error {
 
 // ---- adapter management (web UI) ----
 
-func (c *Core) ListAdapters() []lua.APIAdapter { return c.vm.ListAdapters() }
+func (c *Core) ListAdapters() []lua.APIAdapter {
+	deleted := c.store.DeletedAdapters()
+	list := c.vm.ListAdapters()
+	out := make([]lua.APIAdapter, 0, len(list))
+	for _, a := range list {
+		if !deleted[a.Name] {
+			out = append(out, a)
+		}
+	}
+	return out
+}
 
 // UploadAdapter saves a new Lua adapter script to the adapter dir and loads it.
 func (c *Core) UploadAdapter(name, code string) error {
@@ -295,7 +323,7 @@ func (c *Core) UploadAdapter(name, code string) error {
 	if err := c.vm.LoadAdapter(path); err != nil {
 		return fmt.Errorf("load adapter: %w", err)
 	}
-	return nil
+	return c.store.RestoreAdapter(name)
 }
 
 // RemoveAdapter deletes an adapter script and evicts it from the VM.
@@ -303,7 +331,7 @@ func (c *Core) RemoveAdapter(name string) error {
 	path := filepath.Join(c.cfg.AdapterDir, name+".lua")
 	_ = os.Remove(path)
 	c.vm.RemoveAdapter(name)
-	return nil
+	return c.store.DeleteAdapter(name)
 }
 
 // ---- source management (web UI) ----

internal/gateway/api.go

@@ -1,11 +1,13 @@
 package gateway
 
 import (
+	"encoding/csv"
 	"encoding/json"
 	"io"
 	"net/http"
 	"strconv"
 	"strings"
+	"time"
 
 	"llmsproxy/internal/config"
 )
@@ -133,5 +135,44 @@ func (g *Gateway) handleStatsAPI(w http.ResponseWriter, r *http.Request) {
 		// user keys may only see their own usage
 		key = keyID(reqKey(r.Context()))
 	}
-	writeJSON(w, http.StatusOK, g.stats.Snapshot(limit, key))
+	if r.URL.Query().Get("export") == "csv" {
+		from, _ := strconv.ParseInt(r.URL.Query().Get("from"), 10, 64)
+		to, _ := strconv.ParseInt(r.URL.Query().Get("to"), 10, 64)
+		if to == 0 {
+			to = time.Now().UnixMilli()
+		}
+		w.Header().Set("Content-Type", "text/csv; charset=utf-8")
+		w.Header().Set("Content-Disposition", "attachment; filename=llmsproxy-requests.csv")
+		cw := csv.NewWriter(w)
+		names := map[string]string{}
+		for _, k := range g.core.ListKeys() {
+			names[keyID(k.Key)] = k.Name
+		}
+		_ = cw.Write([]string{"time", "key", "key_name", "type", "model", "source", "status", "ok", "prompt_tokens", "completion_tokens", "latency_ms", "error"})
+		for _, rec := range g.stats.Records(from, to, key) {
+			_ = cw.Write([]string{
+				time.UnixMilli(rec.Time).Format(time.RFC3339),
+				rec.Key,
+				names[rec.Key],
+				rec.Type,
+				rec.Model,
+				rec.Source,
+				strconv.Itoa(rec.Status),
+				strconv.FormatBool(rec.OK),
+				strconv.FormatInt(rec.Prompt, 10),
+				strconv.FormatInt(rec.Compl, 10),
+				strconv.FormatInt(rec.LatMs, 10),
+				rec.Err,
+			})
+		}
+		cw.Flush()
+		return
+	}
+	snap := g.stats.Snapshot(limit, key)
+	keyNames := map[string]string{}
+	for _, k := range g.core.ListKeys() {
+		keyNames[keyID(k.Key)] = k.Name
+	}
+	snap["key_names"] = keyNames
+	writeJSON(w, http.StatusOK, snap)
 }

internal/gateway/chat.go

@@ -108,22 +108,37 @@ func (g *Gateway) resolveCands(ctx context.Context, req *chatRequest) ([]*provid
 
 // filterCandsByModels keeps only providers exposing at least one model of the
 // scope (used for user keys with a restricted model scope). An "AUTO" scope
-// entry means the key is allowed to use any model.
+// entry means the key is allowed to use any model. Scope entries with a
+// Source pinned to a specific upstream narrow the candidates to that source
+// for the matching model.
 func filterCandsByModels(cands []*provider.Provider, allow []config.ModelScope) []*provider.Provider {
-	allowed := make(map[string]bool, len(allow))
 	for _, m := range allow {
 		if m.Model == "" || strings.EqualFold(m.Model, "AUTO") {
 			return cands
 		}
+	}
+	allowed := make(map[string]bool, len(allow))
+	byModelSrc := map[string]map[string]bool{}
+	for _, m := range allow {
 		allowed[m.Model] = true
+		if m.Source != "" {
+			if byModelSrc[m.Model] == nil {
+				byModelSrc[m.Model] = map[string]bool{}
+			}
+			byModelSrc[m.Model][m.Source] = true
+		}
 	}
 	out := make([]*provider.Provider, 0, len(cands))
 	for _, p := range cands {
 		for _, id := range p.Models() {
-			if allowed[id] {
+			if !allowed[id] {
-				out = append(out, p)
+				continue
-				break
 			}
+			if srcs := byModelSrc[id]; len(srcs) > 0 && !srcs[p.Name()] {
+				continue
+			}
+			out = append(out, p)
+			break
 		}
 	}
 	return out
@@ -197,7 +212,7 @@ func (g *Gateway) scopeTokens(ctx context.Context, sc config.ModelScope) int64 {
 		return g.stats.KeyTokens(k)
 	}
 	win := AutoPeriodSeconds(sc.Period, sc.Hours)
-	return g.stats.WindowTokens(sc.Model, win)
+	return g.stats.WindowTokens(sc.Model, sc.Source, win)
 }
 
 func hasScopeModel(list []config.ModelScope, s string) bool {
@@ -263,7 +278,7 @@ func (g *Gateway) handleChat(w http.ResponseWriter, r *http.Request) {
 	if model == "" {
 		model = g.core.DefaultModel()
 	}
-	if strings.EqualFold(strings.TrimSpace(req.Model), "AUTO") {
+	if isAuto(model) {
 		plans := g.autoPlans()
 		if len(plans) == 0 {
 			writeError(w, http.StatusServiceUnavailable, "no_provider", "no auto slot available (quota exhausted or none configured)")
@@ -424,6 +439,39 @@ func effectiveImageModel(model string, cands []*provider.Provider) string {
 	return model
 }
 
+func estimatePromptTokens(req *types.ChatRequest) int64 {
+	if req == nil {
+		return 0
+	}
+	b, _ := json.Marshal(struct {
+		Messages []types.ChatMessage `json:"messages"`
+		Tools    []interface{}       `json:"tools,omitempty"`
+	}{Messages: req.Messages, Tools: req.Tools})
+	if len(b) == 0 {
+		return 0
+	}
+	return int64(len(b)/3 + 1)
+}
+
+func estimateTextTokens(parts ...interface{}) int64 {
+	var n int
+	for _, p := range parts {
+		switch v := p.(type) {
+		case string:
+			n += len(v)
+		case json.RawMessage:
+			n += len(v)
+		case []types.ToolCall:
+			b, _ := json.Marshal(v)
+			n += len(b)
+		}
+	}
+	if n == 0 {
+		return 0
+	}
+	return int64(n/3 + 1)
+}
+
 func (g *Gateway) singleChat(w http.ResponseWriter, ctx context.Context, cands []*provider.Provider, req *types.ChatRequest, effective string, rec *Req) {
 	rec.LatMs = 0
 	t0 := time.Now()
@@ -440,7 +488,13 @@ func (g *Gateway) singleChat(w http.ResponseWriter, ctx context.Context, cands [
 	rec.OK = true
 	rec.Status = http.StatusOK
 	rec.Prompt = int64(resp.TokenUsage.Prompt)
+	if rec.Prompt == 0 {
+		rec.Prompt = estimatePromptTokens(req)
+	}
 	rec.Compl = int64(resp.TokenUsage.Completion)
+	if rec.Compl == 0 {
+		rec.Compl = estimateTextTokens(resp.Content, resp.ReasoningContent, resp.ToolCalls)
+	}
 	rec.Source = usedSrc
 	rec.Model = usedModel
 	g.writeRec(rec)
@@ -495,6 +549,7 @@ func (g *Gateway) streamChat(w http.ResponseWriter, ctx context.Context, cands [
 	if usedModel != "" {
 		rec.Model = usedModel
 	}
+	rec.Prompt = estimatePromptTokens(req)
 	w.Header().Set("Content-Type", "text/event-stream")
 	w.Header().Set("Cache-Control", "no-cache")
 	w.Header().Set("Connection", "keep-alive")
@@ -540,7 +595,7 @@ func (g *Gateway) streamChat(w http.ResponseWriter, ctx context.Context, cands [
 			choice.FinishReason = &stop
 		}
 		chunk.Choices = []ChunkChoice{choice}
-		rec.Compl += int64(len(ck.Content)+len(ck.ReasoningContent)) / 3
+		rec.Compl += int64(len(ck.Content)+len(ck.ReasoningContent)+len(ck.ToolCalls)) / 3
 		if !send(chunk) {
 			return
 		}
@@ -575,7 +630,7 @@ func (g *Gateway) autoPlans() []autoPlan {
 	}
 	plans := make([]autoPlan, 0, len(rules))
 	for _, e := range rules {
-		p := g.core.ProviderForModel(e.Model)
+		p := g.core.ProviderForSlot(e.Model, e.Source)
 		if p == nil {
 			continue
 		}
@@ -583,7 +638,7 @@ func (g *Gateway) autoPlans() []autoPlan {
 			continue
 		}
 		win := AutoPeriodSeconds(e.Period, e.Hours)
-		if e.TokenQuota > 0 && g.stats.WindowTokens(e.Model, win) >= e.TokenQuota {
+		if e.TokenQuota > 0 && g.stats.WindowTokens(e.Model, e.Source, win) >= e.TokenQuota {
 			continue
 		}
 		plans = append(plans, autoPlan{p: p, model: e.Model, quota: e.TokenQuota, win: win})
@@ -599,12 +654,14 @@ func (g *Gateway) singleChatAuto(w http.ResponseWriter, ctx context.Context, pla
 	rec.LatMs = 0
 	t0 := time.Now()
 	var lastErr error
+	var lastSrc, lastModel string
 	for _, pl := range plans {
 		if !pl.p.Available() {
 			continue
 		}
 		r := *req
 		r.Model = pl.model
+		lastSrc, lastModel = pl.p.Name(), pl.model
 		resp, usedSrc, usedModel, err := g.core.Scheduler().Chat(ctx, scheduler.FromRegistry([]*provider.Provider{pl.p}), &r)
 		if err != nil {
 			lastErr = err
@@ -614,7 +671,13 @@ func (g *Gateway) singleChatAuto(w http.ResponseWriter, ctx context.Context, pla
 		rec.OK = true
 		rec.Status = http.StatusOK
 		rec.Prompt = int64(resp.TokenUsage.Prompt)
+		if rec.Prompt == 0 {
+			rec.Prompt = estimatePromptTokens(&r)
+		}
 		rec.Compl = int64(resp.TokenUsage.Completion)
+		if rec.Compl == 0 {
+			rec.Compl = estimateTextTokens(resp.Content, resp.ReasoningContent, resp.ToolCalls)
+		}
 		rec.Source = usedSrc
 		rec.Model = usedModel
 		g.writeRec(rec)
@@ -645,6 +708,12 @@ func (g *Gateway) singleChatAuto(w http.ResponseWriter, ctx context.Context, pla
 	rec.OK = false
 	rec.Status = http.StatusBadGateway
 	rec.Err = lastErr.Error()
+	if rec.Model == "" {
+		rec.Model = lastModel
+	}
+	if rec.Source == "" {
+		rec.Source = lastSrc
+	}
 	g.writeRec(rec)
 	writeError(w, http.StatusBadGateway, "upstream_error", lastErr.Error())
 }
@@ -687,12 +756,14 @@ func (g *Gateway) streamChatAuto(w http.ResponseWriter, ctx context.Context, pla
 		return
 	}
 	var lastErr error
+	var lastSrc, lastModel string
 	for _, pl := range plans {
 		if !pl.p.Available() {
 			continue
 		}
 		r := *req
 		r.Model = pl.model
+		lastSrc, lastModel = pl.p.Name(), pl.model
 		chunks, usedSrc, usedModel, err := g.core.Scheduler().ChatStream(ctx, scheduler.FromRegistry([]*provider.Provider{pl.p}), &r)
 		if err != nil {
 			lastErr = err
@@ -702,6 +773,7 @@ func (g *Gateway) streamChatAuto(w http.ResponseWriter, ctx context.Context, pla
 			rec.Model = usedModel
 			rec.Source = usedSrc
 		}
+		rec.Prompt = estimatePromptTokens(&r)
 		for ck := range chunks {
 			chunk := ChatChunk{
 				ID: id, Object: "chat.completion.chunk", Created: created, Model: rec.Model,
@@ -719,7 +791,7 @@ func (g *Gateway) streamChatAuto(w http.ResponseWriter, ctx context.Context, pla
 				choice.FinishReason = &stop
 			}
 			chunk.Choices = []ChunkChoice{choice}
-			rec.Compl += int64(len(ck.Content)+len(ck.ReasoningContent)) / 3
+			rec.Compl += int64(len(ck.Content)+len(ck.ReasoningContent)+len(ck.ToolCalls)) / 3
 			if !send(chunk) {
 				return
 			}
@@ -732,11 +804,14 @@ func (g *Gateway) streamChatAuto(w http.ResponseWriter, ctx context.Context, pla
 	rec.OK = false
 	rec.Status = http.StatusBadGateway
 	rec.Err = lastErr.Error()
-	stop := "stop"
+	if rec.Model == "" {
-	send(ChatChunk{
+		rec.Model = lastModel
-		ID: id, Object: "chat.completion.chunk", Created: created, Model: "auto",
+	}
-		Choices: []ChunkChoice{{Index: 0, Delta: RespMessage{}, FinishReason: &stop}},
+	if rec.Source == "" {
-	})
+		rec.Source = lastSrc
+	}
+	errEvent, _ := json.Marshal(map[string]interface{}{"error": map[string]string{"message": lastErr.Error(), "type": "upstream_error"}})
+	fmt.Fprintf(w, "data: %s\n\n", errEvent)
 	fmt.Fprintf(w, "data: [DONE]\n\n")
 	if flusher != nil {
 		flusher.Flush()

internal/gateway/server.go

@@ -14,6 +14,8 @@ import (
 	"net/http"
 	"net/url"
 	"strings"
+	"sync"
+	"time"
 
 	"llmsproxy/internal/config"
 	"llmsproxy/internal/core"
@@ -24,9 +26,11 @@ var uiFS embed.FS
 
 // Gateway is the HTTP handler for the OpenAI-compatible endpoint + web UI.
 type Gateway struct {
-	core  *core.Core
+	core       *core.Core
-	ui    http.Handler
+	ui         http.Handler
-	stats *Stats
+	stats      *Stats
+	probeMu    sync.Mutex
+	lastProbe  time.Time
 }
 
 func New(c *core.Core, gatewayKeys []string) (*Gateway, error) {
@@ -34,10 +38,14 @@ func New(c *core.Core, gatewayKeys []string) (*Gateway, error) {
 	if err != nil {
 		return nil, err
 	}
+	st := NewStats(3000)
+	if cfg := c.Config(); cfg != nil && cfg.RuntimeFile != "" {
+		st.LoadAudit(cfg.RuntimeFile + ".audit.jsonl")
+	}
 	return &Gateway{
 		core:  c,
 		ui:    http.FileServer(http.FS(sub)),
-		stats: NewStats(3000),
+		stats: st,
 	}, nil
 }
 
@@ -313,7 +321,21 @@ func (g *Gateway) handleModels(w http.ResponseWriter, r *http.Request) {
 	})
 }
 
+// ensureProbe triggers a live source probe at most once every 30s.
+func (g *Gateway) ensureProbe(ctx context.Context) {
+	g.probeMu.Lock()
+	due := time.Since(g.lastProbe) > 30*time.Second
+	if due {
+		g.lastProbe = time.Now()
+	}
+	g.probeMu.Unlock()
+	if due {
+		g.core.Registry().ProbeAll(ctx)
+	}
+}
+
 func (g *Gateway) handleStatusAPI(w http.ResponseWriter, r *http.Request) {
+	g.ensureProbe(r.Context())
 	host := r.Host
 	if host == "" {
 		host = g.core.Listen()

internal/gateway/stats.go

@@ -1,6 +1,9 @@
 package gateway
 
 import (
+	"bufio"
+	"encoding/json"
+	"os"
 	"sync"
 	"time"
 )
@@ -55,6 +58,7 @@ type Stats struct {
 	byKeySrc   map[string]map[string]*Stat
 	recs       []Req
 	maxRecs    int
+	auditPath  string
 	modelHour  map[string]map[int64]int64 // model -> unix-hour bucket -> tokens
 }
 
@@ -109,6 +113,30 @@ func inc(m map[string]*Stat, name string, r Req) {
 	}
 }
 
+func (s *Stats) LoadAudit(path string) {
+	f, err := os.Open(path)
+	if err == nil {
+		var recs []Req
+		sc := bufio.NewScanner(f)
+		for sc.Scan() {
+			var r Req
+			if json.Unmarshal(sc.Bytes(), &r) == nil {
+				recs = append(recs, r)
+			}
+		}
+		_ = f.Close()
+		if len(recs) > s.maxRecs {
+			recs = recs[len(recs)-s.maxRecs:]
+		}
+		for _, r := range recs {
+			s.Record(r)
+		}
+	}
+	s.mu.Lock()
+	s.auditPath = path
+	s.mu.Unlock()
+}
+
 // Record appends a finished request to the aggregates and ring buffer.
 func (s *Stats) Record(r Req) {
 	s.mu.Lock()
@@ -128,14 +156,18 @@ func (s *Stats) Record(r Req) {
 		s.byKeySrc[r.Key] = ks
 	}
 	inc(ks, r.Source, r)
-	// window bucket for quota enforcement (per model, per unix hour)
+	// window bucket for quota enforcement (per source-model pair, per unix hour)
 	tok := r.Prompt + r.Compl
 	if tok > 0 && r.Model != "" {
+		key := r.Model
+		if r.Source != "" {
+			key = r.Source + "::" + r.Model
+		}
 		h := r.Time / hourSec
-		hm := s.modelHour[r.Model]
+		hm := s.modelHour[key]
 		if hm == nil {
 			hm = map[int64]int64{}
-			s.modelHour[r.Model] = hm
+			s.modelHour[key] = hm
 		}
 		hm[h] += tok
 		if len(hm) > 24*40 {
@@ -150,6 +182,14 @@ func (s *Stats) Record(r Req) {
 	if len(s.recs) > s.maxRecs {
 		s.recs = s.recs[len(s.recs)-s.maxRecs:]
 	}
+	if s.auditPath != "" {
+		if f, err := os.OpenFile(s.auditPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644); err == nil {
+			if b, err := json.Marshal(r); err == nil {
+				_, _ = f.Write(append(b, '\n'))
+			}
+			_ = f.Close()
+		}
+	}
 }
 
 // ModelTokens returns the tokens consumed per model for one gateway key id
@@ -197,11 +237,17 @@ func AutoPeriodSeconds(period string, hours int64) int64 {
 
 // WindowTokens returns the tokens billed for the model within the last `sec`
 // seconds (0 = since forever).
-func (s *Stats) WindowTokens(model string, sec int64) int64 {
+// WindowTokens returns the tokens consumed for one model (optionally pinned
+// to a single source) within the window; sec <= 0 means all time.
+func (s *Stats) WindowTokens(model, source string, sec int64) int64 {
 	s.mu.Lock()
 	defer s.mu.Unlock()
+	key := model
+	if source != "" {
+		key = source + "::" + model
+	}
 	now := time.Now().Unix()
-	hm := s.modelHour[model]
+	hm := s.modelHour[key]
 	if len(hm) == 0 {
 		return 0
 	}
@@ -240,6 +286,26 @@ type StatsRow struct {
 	Stat
 }
 
+// Records returns request records filtered by unix-millisecond time range and key.
+func (s *Stats) Records(from, to int64, key string) []Req {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := make([]Req, 0, len(s.recs))
+	for _, r := range s.recs {
+		if key != "" && r.Key != key {
+			continue
+		}
+		if from > 0 && r.Time < from {
+			continue
+		}
+		if to > 0 && r.Time > to {
+			continue
+		}
+		out = append(out, r)
+	}
+	return out
+}
+
 // Snapshot returns the whole dashboard payload; when key != "" the records
 // and aggregate views are restricted to that gateway key.
 func (s *Stats) Snapshot(limit int, key string) map[string]interface{} {

internal/gateway/ui/index.html

@@ -55,6 +55,7 @@ tr:last-child td { border-bottom:0; }
 .tag-red { background:var(--tag-err); color:var(--err); }
 .tag-blue { background:var(--tag-blue); color:var(--accent); }
 .tag-warn { background:var(--tag-warn); color:var(--warn); }
+.net-dot { display:inline-block; width:7px; height:7px; border-radius:50%; background:currentColor; margin-right:6px; vertical-align:1px; }
 button { background:var(--accent); color:#fff; border:0; border-radius:8px; padding:8px 16px; cursor:pointer;
   font:inherit; font-weight:500; transition:background .15s; }
 button:hover { background:var(--accent-h); }
@@ -263,7 +264,7 @@ html[data-theme="dark"] .dropzone.dragover, html[data-theme="dark"] .dropzone:ho
 .scr-blocks { display:flex; flex-wrap:wrap; align-items:center; min-width:0; }
 /* 块间嵌合：每个块的凸榫插进左侧块的凹槽（平铺同档模型，如积木搭肩） */
 .scr-block { position:relative; display:flex; align-items:center; gap:10px; padding:12px 14px 12px 20px;
-  color:#fff; font-weight:700; font-size:13px; user-select:none; margin-right:7px;
+  color:#fff; font-weight:700; font-size:13px; user-select:none; margin-right:0;
   border-radius:11px 11px 7px 7px; box-shadow:0 6px 0 rgba(0,0,0,.13),
   inset 0 2px 0 rgba(255,255,255,.28), inset 0 -5px 0 rgba(0,0,0,.07); transition:opacity .15s; }
 /* 左侧凸榫：宽14px 从块左缘伸出，正好填满左侧凹槽（块间距 7px → 榫左半插进凹槽右半仍露 7px 搭肩） */
@@ -277,8 +278,9 @@ html[data-theme="dark"] .dropzone.dragover, html[data-theme="dark"] .dropzone:ho
 .scr-row .scr-block:last-child { margin-right:0; }
 .scr-row .scr-block:last-child::after { display:none; }
 /* 左右卡扣生长动画（块新获得左凸榫/右凹槽身份时）—— 延迟到位移完成后再弹出 */
+.scr-block.pre-grow-l::before { transform:translateY(-50%) scaleX(0); transform-origin:100% 50%; opacity:0; }
 .scr-block.grow-l::before { animation:growlL .22s ease-out .24s both; }
-@keyframes growlL { from { transform: translateY(-50%) scaleX(0); transform-origin:100% 50%; } }
+@keyframes growlL { from { transform: translateY(-50%) scaleX(0); transform-origin:100% 50%; opacity:0; } to { transform: translateY(-50%) scaleX(1); opacity:1; } }
 .scr-block.grow-r::after { animation:growrR .22s ease-out .24s both; }
 @keyframes growrR { from { transform: translateY(-50%) scaleX(0); transform-origin:0 50%; } }
 /* 上下卡扣生长动画：新行首块的凸榫/凹槽从根部弹出（列位置定后） */
@@ -290,7 +292,8 @@ html[data-theme="dark"] .dropzone.dragover, html[data-theme="dark"] .dropzone:ho
   align-items:center; justify-content:center; font-size:11px; font-weight:800; letter-spacing:.5px;
   background:rgba(0,0,0,.2); }
 .scr-block .scr-name { white-space:nowrap; font-family:ui-monospace,Menlo,Consolas,monospace; font-size:12px;
-  max-width:200px; overflow:hidden; text-overflow:ellipsis; }
+  max-width:200px; overflow:hidden; text-overflow:ellipsis; display:flex; flex-direction:column; line-height:1.25; }
+.scr-block .scr-srcname { font-size:9.5px; opacity:.75; font-weight:600; max-width:200px; overflow:hidden; text-overflow:ellipsis; }
 .scr-block .scr-tag { flex:0 0 auto; font-family:ui-monospace,Menlo,Consolas,monospace; font-size:10.5px;
   padding:2px 7px; border-radius:9px; background:rgba(0,0,0,.24); color:#ffe9a8;
   border:1px solid rgba(255,220,130,.35); cursor:pointer; }
@@ -310,10 +313,12 @@ html[data-theme="dark"] .dropzone.dragover, html[data-theme="dark"] .dropzone:ho
 .scr-lane.scr-top .scr-block .scr-knob,
 .scr-lane.scr-last .scr-block .scr-slot { display:none; }
 .scr-block.drag-src { opacity:.28; }
-.scr-block.drag-src .scr-knob, .scr-block.drag-src .scr-slot { visibility:hidden; }
+.scr-block.drag-src .scr-knob, .scr-block.drag-src .scr-slot,
+.scr-block.drag-src::before, .scr-block.drag-src::after { visibility:hidden; }
 .scr-ghost { position:fixed; z-index:200; pointer-events:none; transform:rotate(1.5deg) scale(1.05);
   filter:drop-shadow(0 16px 20px rgba(0,0,0,.35)); cursor:grabbing; }
-.scr-ghost .scr-knob, .scr-ghost .scr-slot { display:none; }
+.scr-ghost .scr-knob, .scr-ghost .scr-slot,
+.scr-ghost::before, .scr-ghost::after { display:none; }
 .scr-gap { height:7px; margin:-2px 0 0; border-radius:8px; border:2px dashed transparent; transition:all .12s;
   display:flex; align-items:center; justify-content:center; color:var(--muted); font-size:11px;
   letter-spacing:2px; }
@@ -407,7 +412,7 @@ html[data-theme="dark"] .dropzone.dragover, html[data-theme="dark"] .dropzone:ho
 const STR = {
   zh: {
     tagline:'统一 LLM 网关', logout:'退出登录', langTo:'EN',
-    navStatus:'状态', navChat:'Chat 测试', navSources:'源', navAdapters:'适配器', navSort:'优先级', navKeys:'密钥',
+    navStatus:'状态', navChat:'对话', navSources:'源', navAdapters:'适配器', navSort:'优先级', navKeys:'密钥',
     keysTitle:'密钥管理', keysHint:'管理员密钥可查看与管理全部密钥，并可为每个用户密钥配置可用模型范围；用户密钥只能看到自己。',
     kCreate:'新建密钥', kName:'名称', kRole:'角色', kRoleAdmin:'管理员', kRoleUser:'用户', kNote:'备注（可选）', kCreateBtn:'创建',
     kKey:'密钥', kModels:'可用模型', kCreated:'创建时间', kActions:'操作', kCopy:'复制密钥', kDel:'删除',
@@ -419,11 +424,11 @@ const STR = {
     kAll:'不限',
     kBrickH:'点击编辑模型与配额 · 右键更多操作 · 拖动可跨密钥移动',
     kCopyB:'复制该模型', kEditB:'编辑', kDelB:'删除',
-    kFormTitle:'模型与 Token 配额', kModelB:'模型', kQuotaB:'Token 配额', kQuotaHintB:'0 / 留空 = 无限',
+    kFormTitle:'模型与 Token 配额', kModelB:'模型', kSrcHint:'同一模型多源时请选择具体来源', kAnySrc:'任意源', kQuotaB:'Token 配额', kQuotaHintB:'0 / 留空 = 无限',
     kPeriodB:'重置周期', kPerNothing:'不限（永不过期）', kPerHour:'每 小时', kPerWeek:'每 周', kPerMonth:'每 月', kPerHours:'每 N 小时', kPerNHint:'小时数',
     kEditQ:'编辑配额', kClearQ:'清空配额', kDupB:'复制档位', kDelB2:'删除（从链中移除）',
     kDupOK:'已复制该模型', kMovOK:'已移动', kSaved:'已保存', kEmptyB:'（暂无模型 —— 点击 + 添加）', kAddB:'添加模型',
-    connTitle:'连接配置（Agent / OpenAI SDK）', connHint:'模型名默认 AUTO，按优先级自动选择可用源；点击任一模型可生成固定到该模型的配置。',
+    connTitle:'连接配置（Agent / OpenAI SDK）', connHint:'模型名默认 AUTO，按优先级页面的 AUTO 链选择可用源；点击任一模型可生成固定到该模型的配置。',
     copyCfg:'一键复制配置', copyEnv:'复制为环境变量',
     srcTitle:'源状态', srcCount:'共 %d 个',
     tName:'名称', tAdapter:'适配器', tModels:'模型（点击看配置）', tURL:'地址', tConn:'连接', tConc:'并发',
@@ -440,7 +445,7 @@ const STR = {
     modalNew:'新增源', modalEdit:'编辑源',
     mName:'名称', mURL:'Base URL', mKey:'API Key', mAlias:'适配器', mAliasAuto:'自动', mEp:'聊天端点（可选覆盖）',
     mImgEp:'生图端点（可选覆盖）', mConc:'并发上限', mTemp:'温度',
-    mModels:'模型列表（优先级越大，AUTO 越优先选择）', mAddModel:'+ 模型',
+    mModels:'模型列表', mAddModel:'+ 模型',
     mMeta:'Meta（透传给 build_headers 钩子，JSON）', mSave:'保存', mCancel:'取消',
     toastCopied:'已复制', toastCopyFail:'复制失败，请手动选择复制', toastSaved:'已保存并热重载',
     toastEmpty:'请输入消息', toastBadJson:'Meta 不是合法 JSON', toastSaveFail:'保存失败: %s',
@@ -452,7 +457,7 @@ const STR = {
     sortSave:'保存排序', sortReset:'重置', sortAdd:'添加档位', sortSaved:'排序已保存并热重载', sortNoChange:'无变更', sortHintSave:'点击保存排序后生效',
     sortSource:'源', sortPrio:'优先级 %s', sortEmpty:'（该源暂无模型）',
     kpiActive:'活跃请求', kpiReqs:'总请求', kpiOk:'成功率', kpiTokens:'Tokens', kpiLat:'平均延迟', kpiMaxLat:'最大延迟',
-    dashModel:'模型用量', dashSrc:'源用量与延迟', dashKey:'密钥用量', dashRecs:'请求记录（审计）',
+    dashModel:'模型用量', dashSrc:'源用量与延迟', dashKey:'密钥用量', dashRecs:'请求记录', exportCsv:'导出 CSV', expWeek:'近一周', expMonth:'近一月', expYear:'近一年', expRange:'自定义范围', expStart:'开始日期', expEnd:'结束日期', expDownload:'下载',
     thModel:'模型', thSrc:'源', thKey:'密钥', thReqs:'请求', thOk:'成功', thErr:'失败',
     thPrompt:'输入 Tokens', thCompl:'输出 Tokens', thAvgLat:'平均延迟', thMaxLat:'最长延迟',
     thTime:'时间', thType:'类型', thStatus:'状态', thLatMs:'延迟',
@@ -472,11 +477,11 @@ kMeTitle:'My key', kMeRole:'Role', kMeModels:'Models I can use', kMeHint:'Keys c
     kAll:'All',
     kBrickH:'Click to edit model & quota · right-click for more · drag to move to another key',
     kCopyB:'Copy', kEditB:'Edit', kDelB:'Delete',
-    kFormTitle:'Model & token quota', kModelB:'Model', kQuotaB:'Token quota', kQuotaHintB:'0 / empty = unlimited',
+    kFormTitle:'Model & token quota', kModelB:'Model', kSrcHint:'pick a source when the same model exists on several sources', kAnySrc:'any source', kQuotaB:'Token quota', kQuotaHintB:'0 / empty = unlimited',
     kPeriodB:'Reset period', kPerNothing:'Never', kPerHour:'Every hour', kPerWeek:'Every week', kPerMonth:'Every month', kPerHours:'Every N hours', kPerNHint:'hours',
     kEditQ:'Edit quota', kClearQ:'Clear quota', kDupB:'Duplicate slot', kDelB2:'Delete (remove from chain)',
     kDupOK:'Copied', kMovOK:'Moved', kSaved:'Saved', kEmptyB:'(no models yet — click + to add)', kAddB:'Add model',
-    connTitle:'Connection config (Agent / OpenAI SDK)', connHint:'Model defaults to AUTO — picks the best healthy source by priority. Click a model to pin it.',
+    connTitle:'Connection config (Agent / OpenAI SDK)', connHint:'Model defaults to AUTO — follows the AUTO chain from the Priority page. Click a model to pin it.',
     copyCfg:'Copy config', copyEnv:'Copy as env vars',
     srcTitle:'Sources', srcCount:'%d total',
     tName:'Name', tAdapter:'Adapter', tModels:'Models', tURL:'URL', tConn:'Status', tConc:'Concurrency',
@@ -493,19 +498,19 @@ kMeTitle:'My key', kMeRole:'Role', kMeModels:'Models I can use', kMeHint:'Keys c
     modalNew:'Add source', modalEdit:'Edit source',
     mName:'Name', mURL:'Base URL', mKey:'API Key', mAlias:'Adapter', mAliasAuto:'Auto', mEp:'Chat endpoint (override)',
     mImgEp:'Image endpoint (override)', mConc:'Max concurrency', mTemp:'Temperature',
-    mModels:'Models (higher priority → preferred)', mAddModel:'+ model',
+    mModels:'Models', mAddModel:'+ model',
     mMeta:'Meta (passed to build_headers hook, JSON)', mSave:'Save', mCancel:'Cancel',
     toastCopied:'Copied', toastCopyFail:'Copy failed', toastSaved:'Saved & hot-reloaded',
     toastEmpty:'Enter a message', toastBadJson:'Meta is not valid JSON', toastSaveFail:'Save failed: %s',
     toastUploaded:'Adapter loaded', toastUpFail:'Upload failed: %s', toastNeedAll:'Adapter name and code required',
     toastDelOk:'Deleted', confirmDelSrc:'Delete source %s?', confirmDelAdp:'Delete adapter %s?',
     u:'You:', a:'Assistant:', at:'Assistant [thinking]', aEmpty:'(empty)', aErr:'Request failed: %s',
-    cErr:'Error: %s', chatMeta:'Model=%s · %s ms · %d chars', connPinned:'# Pinned to model: %s (source %s)', connAuto:'# Model "AUTO" picks healthy source by priority',
+    cErr:'Error: %s', chatMeta:'Model=%s · %s ms · %d chars', connPinned:'# Pinned to model: %s (source %s)', connAuto:'# Model "AUTO" follows the Priority page AUTO chain',
     sortTitle:'Canvas sorting: drag blocks to set model priority', sortHint:'Each row = one priority tier, rows go high→low; models on the same row sit side by side and share that priority. Grab the ⠿ handle on the right of a block to drag: drop into a row = join that tier (or reorder within it), drop into the gap between rows = move up/down a tier. Image models (kind=image) stay out.', sortDragGrip:'grab the handle to drag',
     sortSave:'Save order', sortReset:'Reset', sortAdd:'Add slot', sortSaved:'Order saved & hot-reloaded', sortNoChange:'No changes', sortHintSave:'Click Save for it to take effect',
     sortSource:'source', sortPrio:'priority %s', sortEmpty:'(no models in this source)',
     kpiActive:'Active requests', kpiReqs:'Requests', kpiOk:'Success rate', kpiTokens:'Tokens', kpiLat:'Avg latency', kpiMaxLat:'Max latency',
-    dashModel:'Model usage', dashSrc:'Source usage & latency', dashKey:'Key usage', dashRecs:'Request records (audit)',
+    dashModel:'Model usage', dashSrc:'Source usage & latency', dashKey:'Key usage', dashRecs:'Request records', exportCsv:'Export CSV', expWeek:'Last week', expMonth:'Last month', expYear:'Last year', expRange:'Custom range', expStart:'Start date', expEnd:'End date', expDownload:'Download',
     thModel:'Model', thSrc:'Source', thKey:'Key', thReqs:'Requests', thOk:'OK', thErr:'Err',
     thPrompt:'Prompt Tokens', thCompl:'Completion Tokens', thAvgLat:'Avg latency', thMaxLat:'Max latency',
     thTime:'Time', thType:'Type', thStatus:'Status', thLatMs:'Latency',
@@ -589,7 +594,7 @@ async function renderStatus() {
     `<tr><td><b>${esc(x.name)}</b></td><td>${esc(x.adapter)}</td>
      <td>${x.models.map(m => `<span class="tag tag-blue modelchip" onclick="showModelConfig('${escAttr(x.name)}','${escAttr(m)}')">${esc(m)}</span>`).join('')}</td>
      <td><span class="muted">${esc(x.base_url || '')}</span></td>
-     <td>${x.available ? `<span class="tag tag-green">${t('online')}</span>` : `<span class="tag tag-red">${t('offline')}</span>`}</td>
+     <td>${x.live_available ? `<span class="tag tag-green"><i class="net-dot"></i>${t('online')}</span>` : `<span class="tag tag-red" title="${esc(x.last_error || '')}"><i class="net-dot"></i>${t('offline')}</span>`}</td>
      <td>${x.max_concurrent}</td></tr>`).join('');
   $('#tab-status').innerHTML = `
     <div class="kpis" id="kpi-row"></div>
@@ -601,21 +606,21 @@ async function renderStatus() {
       <label>${t('tModels')}</label>
       <div class="chips" id="model-chips"></div>
     </div>
+    <div class="card"><h2>${t('srcTitle')} (${s.sources.length})</h2>
+      <table><tr><th>${t('tName')}</th><th>${t('tAdapter')}</th><th>${t('tModels')}</th><th>${t('tURL')}</th><th>${t('tConn')}</th><th>${t('tConc')}</th></tr>${srcRows || `<tr><td colspan="6" class="empty">${t('srcEmpty')}</td></tr>`}</table>
+    </div>
     <div class="dash-row">
       <div class="card"><h2>${t('dashModel')}</h2><div id="tb-model"></div></div>
       <div class="card"><h2>${t('dashSrc')}</h2><div id="tb-src"></div></div>
     </div>
     <div class="card"><h2>${t('dashKey')}</h2><div id="tb-key"></div></div>
-    <div class="card"><h2>${t('dashRecs')}</h2>
+    <div class="card"><h2><span>${t('dashRecs')}</span><span class="grow"></span><button class="ghost small" onclick="openExportModal()">${t('exportCsv')}</button></h2>
       <div class="filter-line">
         <span class="muted">${t('recFilter')}</span>
         <select id="rec-key" onchange="renderKeyF(this.value)"></select>
       </div>
       <div class="recs-scroll" id="tb-recs"></div>
     </div>
-    <div class="card"><h2>${t('srcTitle')} (${s.sources.length})</h2>
-      <table><tr><th>${t('tName')}</th><th>${t('tAdapter')}</th><th>${t('tModels')}</th><th>${t('tURL')}</th><th>${t('tConn')}</th><th>${t('tConc')}</th></tr>${srcRows || `<tr><td colspan="6" class="empty">${t('srcEmpty')}</td></tr>`}</table>
-    </div>
     <div class="card"><h2>${t('adTitle')} (${s.adapters.length})</h2>
       <table><tr><th>${t('tName')}</th><th>${t('tVersion')}</th></tr>
       ${s.adapters.map(a => `<tr><td>${esc(a.name)}</td><td>${esc(a.version || '')}</td></tr>`).join('')}</table>
@@ -636,6 +641,35 @@ function renderKeySelect(keys) {
   if (cur) sel.value = cur;
 }
 function renderKeyF(v) { statsKeyF = v; paintStats(); }
+function openExportModal() {
+  const now = new Date();
+  const ago = d => { const x = new Date(now); x.setDate(x.getDate() - d); return x.toISOString().slice(0, 10); };
+  const wrap = document.createElement('div'); wrap.id = 'modal-wrap';
+  wrap.style.cssText = 'position:fixed;inset:0;background:rgba(15,22,44,.45);display:flex;align-items:flex-start;justify-content:center;overflow:auto;padding:48px 20px;z-index:50';
+  wrap.innerHTML = `<div class="card" style="width:420px;max-width:100%"><h2>${t('exportCsv')}</h2>
+    <p><button onclick="downloadStatsCsv(${Date.now() - 7*864e5}, ${Date.now()})">${t('expWeek')}</button>
+       <button onclick="downloadStatsCsv(${Date.now() - 30*864e5}, ${Date.now()})">${t('expMonth')}</button>
+       <button onclick="downloadStatsCsv(${Date.now() - 365*864e5}, ${Date.now()})">${t('expYear')}</button></p>
+    <label>${t('expRange')}</label>
+    <div class="row"><div><label>${t('expStart')}</label><input id="exp-from" type="date" value="${ago(7)}"></div>
+    <div><label>${t('expEnd')}</label><input id="exp-to" type="date" value="${now.toISOString().slice(0, 10)}"></div></div>
+    <p><button onclick="downloadStatsCsvFromForm()">${t('expDownload')}</button>
+       <button class="ghost" onclick="this.closest('#modal-wrap').remove()">${t('mCancel')}</button></p>
+  </div>`;
+  document.body.appendChild(wrap);
+}
+function downloadStatsCsv(from, to) {
+  const q = new URLSearchParams({ export: 'csv', from: String(Math.floor(from)), to: String(Math.floor(to)) });
+  if (statsKeyF) q.set('key', statsKeyF);
+  location.href = '/api/stats?' + q.toString();
+  const w = $('#modal-wrap'); if (w) w.remove();
+}
+function downloadStatsCsvFromForm() {
+  const f = $('#exp-from').value, t0 = $('#exp-to').value;
+  const from = f ? new Date(f + 'T00:00:00').getTime() : 0;
+  const to = t0 ? new Date(t0 + 'T23:59:59').getTime() : Date.now();
+  downloadStatsCsv(from, to);
+}
 async function paintStats() {
   try {
     const q = '/api/stats?limit=500' + (statsKeyF ? '&key=' + encodeURIComponent(statsKeyF) : '');
@@ -652,8 +686,8 @@ async function paintStats() {
       <div class="kpi"><div class="k-lab">${t('kpiLat')}</div><div class="k-val">${fmtMs(avg)}</div><div class="k-sub">${t('kpiMaxLat')} ${fmtMs(tot.latency_max_ms)}</div></div>`;
     paintModelTable(st.by_model || []);
     paintSrcTable(st.by_source || []);
-    paintKeyTable(st.by_key || []);
+    paintKeyTable(st.by_key || [], st.key_names || {});
-    paintRecords(st.records || []);
+    paintRecords(st.records || [], st.key_names || {});
     renderKeySelect((st.by_key || []).map(k => k.name));
   } catch (e) { console.error('[stats]', e); }
 }
@@ -682,16 +716,16 @@ function paintSrcTable(rows) {
       <td class="num">${fmtN(r.tokens)}</td>
       <td class="num">${fmtMs(fmtLat(r.latency_sum_ms, r.reqs))}</td><td class="num">${fmtMs(r.latency_max_ms)}</td></tr>`).join('') + '</table></div>';
 }
-function paintKeyTable(rows) {
+function paintKeyTable(rows, keyNames) {
   const el = $('#tb-key'); if (!el) return;
   if (!rows.length) { el.innerHTML = `<div class="muted">${t('noUsage')}</div>`; return; }
   el.innerHTML = `<div class="tbl-wrap"><table><tr><th>${t('thKey')}</th><th class="num">${t('thReqs')}</th><th class="num">${t('thOk')}</th><th class="num">${t('thErr')}</th>
     <th class="num">${t('thTokens')}</th><th class="num">${t('thAvgLat')}</th></tr>` +
-    rows.map(r => `<tr><td><button class="ghost small" onclick="renderKeyF('${escAttr(r.name)}')">${esc(r.name)}</button></td>
+    rows.map(r => `<tr><td><button class="ghost small" onclick="renderKeyF('${escAttr(r.name)}')">${esc(keyNames[r.name] ? keyNames[r.name] + ' · ' + r.name : r.name)}</button></td>
       <td class="num">${fmtN(r.reqs)}</td><td class="num okc">${fmtN(r.ok)}</td><td class="num errc">${fmtN(r.err)}</td>
       <td class="num">${fmtN(r.tokens)}</td><td class="num">${fmtMs(fmtLat(r.latency_sum_ms, r.reqs))}</td></tr>`).join('') + '</table></div>';
 }
-function paintRecords(records) {
+function paintRecords(records, keyNames) {
   const el = $('#tb-recs'); if (!el) return;
   if (!records.length) { el.innerHTML = `<div class="muted">${t('noUsage')}</div>`; return; }
   el.innerHTML = `<table><tr><th>${t('thTime')}</th><th class="num">${t('thStatus')}</th><th>${t('thKey')}</th><th>${t('thType')}</th><th>${t('thModel')}</th><th>${t('thSrc')}</th>
@@ -699,7 +733,7 @@ function paintRecords(records) {
     records.slice().reverse().map(r => `<tr>
       <td class="t-tag">${fmtTime(r.time)}</td>
       <td class="num">${r.ok ? `<span class="tag tag-green">${r.status || 200}</span>` : `<span class="tag tag-red" title="${esc(r.error || '')}">${r.status || 500}</span>`}</td>
-      <td>${esc(r.key)}</td><td class="t-tag">${esc(r.type)}</td><td>${esc(r.model)}</td><td>${esc(r.source || '')}</td>
+      <td>${esc(keyNames[r.key] ? keyNames[r.key] + ' · ' + r.key : r.key)}</td><td class="t-tag">${esc(r.type)}</td><td>${esc(r.model)}</td><td>${esc(r.source || '')}</td>
       <td class="num">${fmtN(r.prompt_tokens)}</td><td class="num">${fmtN(r.completion_tokens)}</td><td class="num">${fmtMs(r.latency_ms)}</td></tr>`).join('') + '</table>';
 }
 function showModelConfig(srcName, model) {
@@ -957,7 +991,7 @@ function removeChatImg(i) { chatImages.splice(i, 1); renderChatImgs(); }
 async function renderSources() {
   const j = await api('/api/sources');
   const rows = j.sources.map(s => `<tr><td><b>${esc(s.name)}</b></td><td>${esc(s.base_url)}</td><td>${esc(s.adapter)}</td>
-    <td>${s.models.map(m => `<span class="tag tag-blue">${esc(m.id)}<span class="muted"> ·${m.priority||0}</span></span>`).join('')}</td>
+    <td>${s.models.map(m => `<span class="tag tag-blue">${esc(m.id)}</span>`).join('')}</td>
     <td><button class="ghost small" onclick="editSource(${JSON.stringify(s.name).replace(/"/g,'&quot;')})">${t('srcEdit')}</button>
         <button class="danger small" onclick="delSource('${escAttr(s.name)}')">${t('srcDel')}</button></td></tr>`).join('');
   $('#tab-sources').innerHTML = `
@@ -1006,9 +1040,8 @@ function editSource(name) {
   }).catch(() => {});
 }
 function modelRow(m, i) {
-  return `<div class="model-row">
+  return `<div class="model-row" data-priority="${m.priority || 0}">
     <input data-mi="${i}" class="m-id" placeholder="model-id" value="${escAttr(m.id)}">
-    <input data-mi="${i}" class="m-prio" type="number" placeholder="priority" value="${m.priority || 0}" style="width:90px">
     <select data-mi="${i}" class="m-kind"><option ${(m.kind==='image')?'':'selected'} value="chat">chat</option><option ${(m.kind==='image')?'selected':''} value="image">image</option></select>
     <button class="ghost del small" onclick="this.closest('.model-row').remove()">&times;</button>
   </div>`;
@@ -1020,7 +1053,7 @@ function addModelRow() {
 async function saveSource(btn) {
   const models = [...document.querySelectorAll('#s-models .model-row')].map(row => ({
     id: row.querySelector('.m-id').value.trim(),
-    priority: parseInt(row.querySelector('.m-prio').value) || 0,
+    priority: parseInt(row.dataset.priority) || 0,
     kind: row.querySelector('.m-kind').value,
   })).filter(m => m.id);
   let meta = {};
@@ -1062,41 +1095,44 @@ function srcShort(name) { return (name || '?').slice(0, 2).toUpperCase(); }
 const sortState = { lanes: [], origin: null, drag: null };
 async function renderSort() {
   const j = await api('/api/sources');
-  const map = new Map();
-  j.sources.forEach(s => (s.models || []).forEach(m => {
-    if (m.kind === 'image') return;   // image models never share the chat chain
-    const p = m.priority || 0;
-    if (!map.has(p)) map.set(p, []);
-    map.get(p).push({ src: s.name, id: m.id });
-  }));
-  sortState.lanes = [...map.entries()].sort((a, b) => b[0] - a[0]).map(([prio, models]) => {
-    models.sort((x, y) => x.src < y.src ? -1 : x.src > y.src ? 1 : 0);
-    models.forEach(m => m.uid = nexUid());
-    return { prio, models };
-  });
-  // attach per-block quota meta from the AUTO rules (rules are ordered exactly
-  // like the chain; each block of a model instance gets its own rule)
   let autoR = [];
   try { autoR = (await api('/api/auto')).rules || []; } catch (e) {}
-  const un = autoR.slice();
+  const byModel = new Map();
-  sortState.lanes.forEach(lane => lane.models.forEach(m => {
+  const byPair = new Map();
-    const ri = un.findIndex(r => r.model === m.id);
+  const sourceRows = new Map();
-    if (ri >= 0) {
+  j.sources.forEach(s => (s.models || []).forEach(m => {
-      const r = un.splice(ri, 1)[0];
+    if (m.kind === 'image') return;
-      m.meta = { quota: r.token_quota || 0, period: r.period || '', hours: r.hours || 0 };
+    const it = { src: s.name, id: m.id, prio: m.priority || 0 };
-    } else m.meta = null;
+    byPair.set(m.id + '|' + s.name, it);
+    if (!byModel.has(m.id)) byModel.set(m.id, it);
+    if (!sourceRows.has(it.prio)) sourceRows.set(it.prio, []);
+    sourceRows.get(it.prio).push({ src: s.name, id: m.id });
   }));
-  // orphan slots: rules left over after attaching one rule per source block
+  if (autoR.length) {
-  // (a model may legitimately appear twice in the chain -> its 2nd..nth rules
+    const tiers = [];
-  // become extra slots, preserving the multi-tier schedule)
+    autoR.forEach((r, i) => {
-  un.forEach(r => {
+      const src = normSrc(r.source);
-    sortState.lanes.push({ prio: 0, models: [{ src: '*', id: r.model, uid: nexUid(),
+      const pair = src ? byPair.get(r.model + '|' + src) : null;
-      meta: { quota: r.token_quota || 0, period: r.period || '', hours: r.hours || 0 } }] });
+      if (src && !pair) return;
-  });
+      const ref = pair || byModel.get(r.model) || { src: '*', id: r.model };
-  // model picker for the "add slot" control
+      const ti = Math.max(1, parseInt(r.tier) || (i + 1)) - 1;
-  let addModels = [];
+      if (!tiers[ti]) tiers[ti] = [];
-  try { addModels = (await api('/api/status')).models || []; } catch (e) {}
+      tiers[ti].push({
-  allModels = addModels;
+        src: ref.src || '*', id: r.model, uid: nexUid(),
+        meta: { quota: r.token_quota || 0, period: r.period || '', hours: r.hours || 0 },
+      });
+    });
+    sortState.lanes = tiers.filter(Boolean).map((models, i) => ({ prio: (tiers.length - i) * 10, models }));
+  } else {
+    sortState.lanes = [...sourceRows.entries()].sort((a, b) => b[0] - a[0]).map(([prio, models]) => {
+      models.sort((x, y) => x.src < y.src ? -1 : x.src > y.src ? 1 : 0);
+      models.forEach(m => { m.uid = nexUid(); m.meta = null; });
+      return { prio, models };
+    });
+  }
+  // model picker for the "add slot" control: one option per (source, model)
+  // pair so identical model ids on different sources stay distinguishable
+  await loadModelPairs();
   sortState.origin = JSON.stringify(sortState.lanes);
   $('#tab-sort').innerHTML = `
     <div class="card"><h2><span>${t('sortTitle')}</span><span class="grow"></span>
@@ -1112,17 +1148,17 @@ async function renderSort() {
     </div>`;
   paintSort();
 }
-function scrBlockHtml(it, isFirst, li, ji) {
+function scrBlockHtml(it, isFirst, li, ji, extraClass) {
   const c = srcColor(it.src);
   const s = srcShort(it.src);
   return `
-    <div class="scr-block" data-key="${escAttr(it.uid)}" data-li="${li}" data-ji="${ji}"
+    <div class="scr-block ${escAttr(extraClass || '')}" data-key="${escAttr(it.uid)}" data-li="${li}" data-ji="${ji}"
          style="background:linear-gradient(135deg,${c[0]},${c[1]})"
          onclick="scrCtx(event,'${li}','${ji}')"
          oncontextmenu="scrCtx(event,'${li}','${ji}')">
       ${isFirst ? '<i class="scr-knob"></i><i class="scr-slot"></i>' : ''}
       <span class="scr-ico">${esc(it.src === '*' ? '+' : s)}</span>
-      <span class="scr-name">${esc(it.id)}</span>
+      <span class="scr-name">${esc(it.id)}<em class="scr-srcname">${esc(it.src === '*' ? t('kAnySrc') : it.src)}</em></span>
       ${it.meta ? `<span class="scr-tag">${esc(quantBadge(it.meta.quota, it.meta.period, it.meta.hours))}</span>` : ''}
       <span class="scr-x" title="${escAttr(t('kDelB2'))}" onclick="event.stopPropagation();scrDelSlot('${li}','${ji}')">×</span>
       <span class="scr-grip"><i></i><i></i><i></i></span>
@@ -1178,6 +1214,10 @@ function paintSortNow(affected) {
   });
   cv.querySelectorAll('.scr-lane').forEach(l => prev.set('lane:' + l.dataset.lane, l.getBoundingClientRect()));
   cv.querySelectorAll('.scr-block').forEach(b => prev.set('blk:' + b.dataset.key, b.getBoundingClientRect()));
+  const preGrowL = new Set();
+  sortState.lanes.forEach(lane => lane.models.forEach((m, i) => {
+    if (i > 0 && (prevFirst.has(m.uid) || !prev.has('blk:' + m.uid))) preGrowL.add(m.uid);
+  }));
   const html = [];
   sortState.lanes.forEach((lane, li) => {
     const n = sortState.lanes.length - li;
@@ -1185,7 +1225,7 @@ function paintSortNow(affected) {
     html.push(`<div class="scr-gap" data-gap="${li}"></div>`);
     html.push(`<div class="${cls}" data-lane="${li}">
         <div class="scr-tier">${Array.from({ length: n }, () => '<span></span>').join('')}</div>
-        <div class="scr-row">${lane.models.map((m, i) => scrBlockHtml(m, i === 0, li, i)).join('')}</div>
+        <div class="scr-row">${lane.models.map((m, i) => scrBlockHtml(m, i === 0, li, i, preGrowL.has(m.uid) ? 'pre-grow-l' : '')).join('')}</div>
       </div>`);
   });
   html.push(`<div class="scr-gap" data-gap="${sortState.lanes.length}"></div>`);
@@ -1243,7 +1283,7 @@ function paintSortNow(affected) {
         const peer2 = cv.querySelector(`.scr-lane[data-lane="${li + 1}"] .scr-block`);
         if (peer2) peer2.classList.add('grow-t');
       }
-      if (!isFirst && prevFirst.has(key)) b.classList.add('grow-l');
+      if (!isFirst && (prevFirst.has(key) || !prev.has('blk:' + key))) { b.classList.remove('pre-grow-l'); void b.offsetWidth; b.classList.add('grow-l'); }
       if (!isLast && prevLast.has(key)) b.classList.add('grow-r');
     });
   });
@@ -1432,41 +1472,22 @@ function sortReset() {
   paintSort(all);
 }
 async function saveSort() {
-  const snap = await api('/api/sources');
+  try {
-  const byName = {}; snap.sources.forEach(x => byName[x.name] = x);
+    await persistAuto();
-  const groups = {};
+    sortState.origin = JSON.stringify(sortState.lanes);
-  sortState.lanes.forEach((lane, li) => lane.models.forEach(it => {
+    toast(t('sortSaved'));
-    (groups[it.src] = groups[it.src] || []).push({ id: it.id, priority: (sortState.lanes.length - li) * 10 });
+  } catch (e) { toast(e.message); }
-  }));
-  let dirty = 0;
-  for (const name of Object.keys(groups)) {
-    const base = byName[name];
-    if (!base) continue;
-    const seen = new Set();
-    const ordered = groups[name].filter(it => { if (seen.has(it.id)) return false; seen.add(it.id); return true; })
-      .map(it => ({ id: it.id, priority: it.priority, kind: 'chat' }));
-    (base.models || []).forEach(x => {
-      if (seen.has(x.id)) return;
-      ordered.push({ id: x.id, priority: x.priority || 0, kind: x.kind === 'image' ? 'image' : 'chat' });
-    });
-    if (JSON.stringify(ordered) !== JSON.stringify(base.models)) {
-      base.models = ordered;
-      await api('/api/sources', { method: 'POST', body: JSON.stringify(base) });
-      dirty++;
-    }
-  }
-  toast(dirty ? t('sortSaved') : t('sortNoChange'));
-  sortState.origin = JSON.stringify(sortState.lanes);
-  try { await persistAuto(); } catch (e) { toast(e.message); }
 }
 
 /* ---------- AUTO quota editing on sort blocks ---------- */
 async function persistAuto() {
   const rules = [];
-  sortState.lanes.forEach(lane => lane.models.forEach(it => {
+  sortState.lanes.forEach((lane, li) => lane.models.forEach(it => {
     const m = it.meta;
     rules.push({
       model: it.id,
+      source: it.src === '*' ? undefined : it.src,
+      tier: li + 1,
       token_quota: m && m.quota ? +m.quota : 0,
       period: m && m.period ? m.period : '',
       hours: m && m.hours ? +m.hours : 0,
@@ -1479,8 +1500,10 @@ function scrAddModal() {
   const wrap = document.createElement('div'); wrap.id = 'modal-wrap';
   wrap.style.cssText = 'position:fixed;inset:0;background:rgba(15,22,44,.45);display:flex;align-items:flex-start;justify-content:center;overflow:auto;padding:48px 20px;z-index:50';
   wrap.innerHTML = `<div class="card" style="width:400px;max-width:100%"><h2>${t('sortAdd')}</h2>
-      <label>${t('kModelB')}</label>
+      <label>${t('kModelB')} <span class="muted">${t('kSrcHint')}</span></label>
-      <select id="a-model">${allModels.map(m => `<option value="${escAttr(m)}">${esc(m)}</option>`).join('')}</select>
+      <select id="a-model">${allModels.map(m => typeof m === 'string'
+        ? `<option value="${escAttr(m)}">${esc(m)}</option>`
+        : `<option value="${escAttr(m.key)}">${esc(m.label)}</option>`).join('')}</select>
       <label>${t('kQuotaB')} <span class="muted">${t('kQuotaHintB')}</span></label>
       <input id="a-quota" type="number" min="0" step="1" placeholder="${escAttr(t('kQuotaHintB'))}">
       <label>${t('kPeriodB')}</label>
@@ -1504,14 +1527,15 @@ function scrAddModal() {
   $('#a-model').focus();
 }
 function scrAddFromForm() {
-  const model = $('#a-model').value.trim();
+  const raw = $('#a-model').value.trim();
-  if (!model) { toast(t('kName')); return; }
+  if (!raw) { toast(t('kName')); return; }
+  const [id, src] = raw.split('|');
   let q = parseInt($('#a-quota').value);
   if (isNaN(q) || q < 0) q = 0;
   const p = $('#a-period').value;
   let h = parseInt($('#a-hours').value);
   if (isNaN(h) || h < 1) h = 1;
-  sortState.lanes.push({ models: [{ src: '*', id: model, uid: nexUid(), meta: { quota: q, period: p, hours: (p || q) ? h : 0 } }] });
+  sortState.lanes.push({ models: [{ src: src || '*', id: id, uid: nexUid(), meta: { quota: q, period: p, hours: (p || q) ? h : 0 } }] });
   const li = sortState.lanes.length - 1;
   const w = $('#modal-wrap'); if (w) w.remove();
   paintSort([li]);
@@ -1544,7 +1568,7 @@ function sortScopeEdit(li, ji) {
   const cur = it.meta || { quota: 0, period: '', hours: 0 };
   const wrap = document.createElement('div'); wrap.id = 'modal-wrap';
   wrap.style.cssText = 'position:fixed;inset:0;background:rgba(15,22,44,.45);display:flex;align-items:flex-start;justify-content:center;overflow:auto;padding:48px 20px;z-index:50';
-  wrap.innerHTML = `<div class="card" style="width:400px;max-width:100%"><h2>${t('kFormTitle')} · ${esc(it.id)}</h2>
+  wrap.innerHTML = `<div class="card" style="width:400px;max-width:100%"><h2>${t('kFormTitle')} · ${esc(it.id)}${it.src !== '*' ? ' · ' + esc(it.src) : ''}</h2>
       <label>${t('kQuotaB')} <span class="muted">${t('kQuotaHintB')}</span></label>
       <input id="q-quota" type="number" min="0" step="1"
         placeholder="${escAttr(t('kQuotaHintB'))}" value="${cur.quota || ''}">
@@ -1654,6 +1678,17 @@ async function delAdapter(name) {
 /* ---------- keys tab ---------- */
 let allModels = [];
 let scopeDragEl = null;
+async function loadModelPairs() {
+  let srcs = [];
+  try { srcs = (await api('/api/sources')).sources || []; } catch (e) {}
+  const pairs = [];
+  (srcs || []).forEach(s => (s.models || []).forEach(m => {
+    if (m.kind === 'image') return;
+    pairs.push({ src: s.name, id: m.id, label: m.id + ' · ' + s.name, key: m.id + '|' + s.name });
+  }));
+  if (pairs.length) { allModels = pairs; return; }
+  try { allModels = (await api('/api/status')).models || []; } catch (e) { allModels = []; }
+}
 function maskKey(k) { return k.length > 12 ? k.slice(0, 6) + '…' + k.slice(-6) : k; }
 function fmtCreated(ts) { if (!ts) return '—'; const d = new Date(ts * 1000);
   const p = x => String(x).padStart(2, '0');
@@ -1674,15 +1709,13 @@ async function renderKeysUser(me) {
         <td><span class="kr-key">${esc(me.key)}</span>
           <button class="ghost small" onclick="copyText('${escAttr(me.key)}')">${t('kCopy')}</button></td>
         <td>${(me.models && me.models.length)
-          ? me.models.map(m => `<span class="tag tag-blue" title="${m.token_quota ? 'quota ' + fmtQuota(m.token_quota) : t('kQuotaUnlim')}">${esc(m.model)}${m.token_quota ? ' · ' + esc(fmtQuota(m.token_quota)) : ''}</span>`).join('')
+          ? me.models.map(m => { const src = normSrc(m.source); return `<span class="tag tag-blue" title="${m.token_quota ? 'quota ' + fmtQuota(m.token_quota) : t('kQuotaUnlim')}">${esc(m.model)}${src ? ' · ' + esc(src) : ''}${m.token_quota ? ' · ' + esc(fmtQuota(m.token_quota)) : ''}</span>` }).join('')
           : `<span class="scope-unlim">${t('kAll')}</span>`}</td></tr></table>
       <div class="muted" style="margin-top:10px">${t('kMeHint')}</div>
     </div>`;
 }
 async function renderKeysAdmin() {
-  let models = [];
+  await loadModelPairs();
-  try { models = (await api('/api/status')).models || []; } catch (e) {}
-  allModels = models;
   $('#tab-keys').innerHTML = `
     <div class="key-actions">
       <span class="grow"></span>
@@ -1712,6 +1745,7 @@ function keyCanvasHtml(k) {
       <span class="grow"></span>
       <span class="muted">${fmtCreated(k.created_at)}</span>
       <button class="ghost small errc" onclick="delKey('${escAttr(k.key)}','${escAttr(k.name || '')}')">${t('kDel')}</button>
+      <button class="ghost small errc" title="${escAttr(t('kDel'))}" onclick="delKey('${escAttr(k.key)}','${escAttr(k.name || '')}')">×</button>
     </div>
     <div class="kc-blocks" data-key="${escAttr(k.key)}">
       ${scopes.length ? '' : `<span class="mb-empty">${t('kEmptyB')}</span>`}
@@ -1722,17 +1756,23 @@ function keyCanvasHtml(k) {
 }
 function scopeHtml(key, m) {
   const qt = fmtQuota(m.token_quota);
-  const attrs = `data-key="${escAttr(key)}" data-model="${escAttr(m.model)}"
+  const comb = scopeComb(m);
+  const src = normSrc(m.source);
+  const attrs = `data-key="${escAttr(key)}" data-model="${escAttr(comb)}"
       data-quota="${m.token_quota || 0}" data-period="${escAttr(m.period || '')}" data-hours="${m.hours || 0}"`;
   return `<span class="mb" draggable="true" ${attrs} title="${escAttr(t('kBrickH'))}"
-      onclick="scopeEdit('${escAttr(key)}','${escAttr(m.model)}')"
+      onclick="scopeEdit('${escAttr(key)}','${escAttr(comb)}')"
-      oncontextmenu="scopeCtx(event,'${escAttr(key)}','${escAttr(m.model)}')">
+      oncontextmenu="scopeCtx(event,'${escAttr(key)}','${escAttr(comb)}')">
     <span class="mb-ico">◆</span>
-    <span class="mb-name">${esc(m.model)}</span>
+    <span class="mb-name">${esc(m.model)}${src ? `<em class="mb-src">${esc(src)}</em>` : ''}</span>
     <span class="mb-quota">${esc(quantBadge(m.token_quota, m.period, m.hours))}</span>
-    <span class="copy-b" title="${escAttr(t('kCopyB'))}" onclick="event.stopPropagation();scopeDup('${escAttr(key)}','${escAttr(m.model)}')">⧉</span>
+    <span class="copy-b" title="${escAttr(t('kCopyB'))}" onclick="event.stopPropagation();scopeDup('${escAttr(key)}','${escAttr(comb)}')">⧉</span>
   </span>`;
 }
+function normSrc(s) { return (!s || s === 'undefined' || s === 'null') ? '' : s; }
+function scopeComb(m) { const s = normSrc(m.source); return s ? m.model + '|' + s : m.model; }
+function splitCombKey(comb) { const p = String(comb).split('|'); return { model: p[0], source: normSrc(p[1]) }; }
+function scopeUncomb(comb) { const p = String(comb).split('|'); return { model: p[0], source: p[1] || '' }; }
 function fmtQuota(q) { q = +q || 0; if (!q) return '∞';
   if (q >= 1e9) return (q / 1e9).toFixed(1) + 'B';
   if (q >= 1e6) return (q / 1e6).toFixed(1) + 'M';
@@ -1753,12 +1793,17 @@ function quantBadge(quota, period, hours) {
   return fmtQuota(quota) + periodText(period, hours);
 }
 function readScopes(canvas) {
-  return [...canvas.querySelectorAll('.mb')].map(b => ({
+  return [...canvas.querySelectorAll('.mb')].map(b => {
-    model: b.dataset.model,
+    const comb = b.dataset.model.split('|');
-    token_quota: parseInt(b.dataset.quota) || 0,
+    const src = comb.length > 1 ? normSrc(comb[1]) : '';
-    period: b.dataset.period || '',
+    return {
-    hours: parseInt(b.dataset.hours) || 0,
+      model: comb[0],
-  }));
+      source: src || undefined,
+      token_quota: parseInt(b.dataset.quota) || 0,
+      period: b.dataset.period || '',
+      hours: parseInt(b.dataset.hours) || 0,
+    };
+  });
 }
 async function putScope(key, scopes) {
   await api('/api/keys/' + encodeURIComponent(key), { method: 'PUT', body: JSON.stringify({ models: scopes }) });
@@ -1772,48 +1817,51 @@ async function scopePush(key) {
   await loadKeys();
   scopeEdit(key, 'AUTO');
 }
-async function scopeDup(key, model) {
+async function scopeDup(key, comb) {
   const canvas = document.querySelector(`.key-canvas[data-key="${CSS.escape(key)}"]`);
   if (!canvas) return;
   const scopes = readScopes(canvas);
-  const src = scopes.find(s => s.model === model);
+  const src = scopes.find(s => scopeComb(s) === comb);
   if (!src) return;
-  scopes.push({ model: src.model, token_quota: src.token_quota });
+  scopes.push({ model: src.model, source: src.source, token_quota: src.token_quota });
   try { await putScope(key, scopes); toast(t('kDupOK')); } catch (e) { toast(e.message); }
 }
-async function scopeRm(key, model) {
+async function scopeRm(key, comb) {
   const canvas = document.querySelector(`.key-canvas[data-key="${CSS.escape(key)}"]`);
   if (!canvas) return;
-  const scopes = readScopes(canvas).filter(s => s.model !== model);
+  const scopes = readScopes(canvas).filter(s => scopeComb(s) !== comb);
   try { await putScope(key, scopes); } catch (e) { toast(e.message); return; }
   await loadKeys();
   toast(t('toastDelOk'));
 }
-function scopeEdit(key, model) {
+function scopeEdit(key, comb) {
   const canvas = document.querySelector(`.key-canvas[data-key="${CSS.escape(key)}"]`);
   if (!canvas) return;
-  const cur = readScopes(canvas).find(s => s.model === model) || { model: '', token_quota: 0 };
+  const sc = readScopes(canvas).find(s => scopeComb(s) === comb)
+        || { model: '', source: '', token_quota: 0, period: '', hours: 0 };
+  const curM = sc.model;
   const wrap = document.createElement('div'); wrap.id = 'modal-wrap';
   wrap.style.cssText = 'position:fixed;inset:0;background:rgba(15,22,44,.45);display:flex;align-items:flex-start;justify-content:center;overflow:auto;padding:48px 20px;z-index:50';
-  const opts = ['AUTO', ...allModels];
+  const opts = [{ key: 'AUTO', label: 'AUTO' }].concat(allModels.map(m => typeof m === 'string'
-  if (cur.model && !opts.includes(cur.model)) opts.unshift(cur.model);
+    ? { key: m, label: m } : { key: m.key, label: m.label }));
+  if (curM && !opts.some(o => o.key === comb)) opts.unshift({ key: comb, label: comb });
   wrap.innerHTML = `<div class="card" style="width:400px;max-width:100%"><h2>${t('kFormTitle')}</h2>
-      <label>${t('kModelB')}</label>
+      <label>${t('kModelB')} <span class="muted">${t('kSrcHint')}</span></label>
-      <select id="sc-model">${opts.map(m => `<option value="${escAttr(m)}" ${m === cur.model ? 'selected' : ''}>${esc(m)}</option>`).join('')}</select>
+      <select id="sc-model">${opts.map(o => `<option value="${escAttr(o.key)}" ${o.key === comb ? 'selected' : ''}>${esc(o.label)}</option>`).join('')}</select>
       <label>${t('kQuotaB')} <span class="muted">${t('kQuotaHintB')}</span></label>
       <input id="sc-quota" type="number" min="0" step="1"
-        placeholder="${escAttr(t('kQuotaHintB'))}" value="${cur.token_quota ? cur.token_quota : ''}">
+        placeholder="${escAttr(t('kQuotaHintB'))}" value="${sc.token_quota ? sc.token_quota : ''}">
       <label>${t('kPeriodB')}</label>
       <select id="sc-period">
-        <option value="" ${!cur.period ? 'selected' : ''}>${t('kPerNothing')}</option>
+        <option value="" ${!sc.period ? 'selected' : ''}>${t('kPerNothing')}</option>
-        <option value="hour" ${cur.period === 'hour' ? 'selected' : ''}>${t('kPerHour')}</option>
+        <option value="hour" ${sc.period === 'hour' ? 'selected' : ''}>${t('kPerHour')}</option>
-        <option value="week" ${cur.period === 'week' ? 'selected' : ''}>${t('kPerWeek')}</option>
+        <option value="week" ${sc.period === 'week' ? 'selected' : ''}>${t('kPerWeek')}</option>
-        <option value="month" ${cur.period === 'month' ? 'selected' : ''}>${t('kPerMonth')}</option>
+        <option value="month" ${sc.period === 'month' ? 'selected' : ''}>${t('kPerMonth')}</option>
-        <option value="nhour" ${cur.period === 'nhour' ? 'selected' : ''}>${t('kPerHours')}</option>
+        <option value="nhour" ${sc.period === 'nhour' ? 'selected' : ''}>${t('kPerHours')}</option>
       </select>
       <div id="sc-hours-box" style="display:none"><label>${t('kPerNHint')}</label>
-        <input id="sc-hours" type="number" min="1" step="1" value="${cur.hours || 24}"></div>
+        <input id="sc-hours" type="number" min="1" step="1" value="${sc.hours || 24}"></div>
-      <p><button onclick="scopeSave('${escAttr(key)}','${escAttr(cur.model)}', this)">${t('kSaveScope')}</button>
+      <p><button onclick="scopeSave('${escAttr(key)}','${escAttr(comb)}', this)">${t('kSaveScope')}</button>
          <button class="ghost" onclick="this.closest('#modal-wrap').remove()">${t('mCancel')}</button></p>
     </div>`;
   document.body.appendChild(wrap);
@@ -1823,20 +1871,22 @@ function scopeEdit(key, model) {
   });
   $('#sc-model').focus();
 }
-async function scopeSave(key, oldModel, btn) {
+async function scopeSave(key, oldComb, btn) {
   const canvas = document.querySelector(`.key-canvas[data-key="${CSS.escape(key)}"]`);
   if (!canvas) return;
-  const model = $('#sc-model').value.trim();
+  const comb = $('#sc-model').value.trim();
-  if (!model) { toast(t('kName')); return; }
+  if (!comb) { toast(t('kName')); return; }
+  const parts = splitCombKey(comb);
   let q = parseInt($('#sc-quota').value);
-  if (isNaN(q) || isNaN(q) || q < 0) q = 0;
+  if (isNaN(q) || q < 0) q = 0;
   let hours = parseInt($('#sc-hours').value);
   if (isNaN(hours) || hours < 1) hours = 1;
   const period = $('#sc-period').value;
   const scopes = readScopes(canvas);
-  const i = scopes.findIndex(s => s.model === oldModel);
+  const entry = { model: parts.model, source: parts.source || undefined, token_quota: q, period, hours };
-  if (i < 0) scopes.push({ model, token_quota: q, period, hours });
+  const i = scopes.findIndex(s => scopeComb(s) === oldComb);
-  else scopes[i] = { model, token_quota: q, period, hours };
+  if (i < 0) scopes.push(entry);
+  else scopes[i] = entry;
   if (btn) btn.disabled = true;
   try {
     await putScope(key, scopes);
@@ -1892,16 +1942,16 @@ function bindCanvasDrop(cv) {
     moveBrick(scopeDragEl.key, cv.dataset.key, scopeDragEl.model);
   });
 }
-async function moveBrick(from, to, model) {
+async function moveBrick(from, to, comb) {
   if (from === to) return;
   const sf = document.querySelector(`.key-canvas[data-key="${CSS.escape(from)}"]`);
   const st = document.querySelector(`.key-canvas[data-key="${CSS.escape(to)}"]`);
   if (!sf || !st) return;
   let fs = readScopes(sf), ts = readScopes(st);
-  const b = fs.find(s => s.model === model);
+  const b = fs.find(s => scopeComb(s) === comb);
   if (!b) return;
-  fs = fs.filter(s => s.model !== model);
+  fs = fs.filter(s => scopeComb(s) !== comb);
-  const dup = ts.some(s => s.model === model);
+  const dup = ts.some(s => scopeComb(s) === comb);
   if (!dup) ts.push(b);
   try {
     await putScope(from, fs);

internal/provider/provider.go

@@ -57,9 +57,14 @@ type Provider struct {
 	adapter string
 	client  *http.Client
 
-	mu     sync.Mutex
+	mu        sync.Mutex
-	sem    chan struct{}
+	sem       chan struct{}
-	health health
+	health    health
+	lastProbe struct {
+		ok   bool
+		err  string
+		at   int64
+	}
 }
 
 func New(cfg config.Source, vm *lua.VM) *Provider {
@@ -175,6 +180,48 @@ func (p *Provider) Available() bool {
 	return p.health.available()
 }
 
+// Probe performs a lightweight reachability + auth check against the source
+// using its best chat model (1-token). It records the result for Status().
+func (p *Provider) Probe(ctx context.Context) (bool, string) {
+	ok := false
+	msg := ""
+	model := p.bestChatModel()
+	if pm := p.ModelByID(model); pm != nil && pm.Kind == "image" {
+		model = ""
+	}
+	if model == "" {
+		if ms := p.Models(); len(ms) > 0 {
+			model = ms[0]
+		}
+	}
+	if model != "" {
+		_, err := p.Chat(ctx, &types.ChatRequest{
+			Model:     model,
+			Messages:  []types.ChatMessage{{Role: "user", Content: types.StringContent("hi")}},
+			MaxTokens: 1,
+		})
+		if err == nil {
+			ok = true
+		} else {
+			msg = err.Error()
+		}
+	} else {
+		msg = "no chat model configured"
+	}
+	p.mu.Lock()
+	p.lastProbe.ok = ok
+	p.lastProbe.err = msg
+	p.lastProbe.at = time.Now().Unix()
+	p.mu.Unlock()
+	return ok, msg
+}
+
+func (p *Provider) LastProbe() (bool, string, int64) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	return p.lastProbe.ok, p.lastProbe.err, p.lastProbe.at
+}
+
 // ReportStatus records an upstream HTTP status for backoff decisions.
 func (p *Provider) ReportStatus(code int) {
 	p.mu.Lock()
@@ -331,21 +378,23 @@ func (p *Provider) ChatStream(ctx context.Context, req *types.ChatRequest) (<-ch
 	}()
 
 	ch := make(chan types.UnifiedChunk, 64)
+	sel := <-rc
+	if sel.err != nil {
+		p.reportError()
+		p.Release()
+		return nil, sel.err
+	}
+	if sel.resp.StatusCode != 200 {
+		raw, _ := io.ReadAll(sel.resp.Body)
+		sel.resp.Body.Close()
+		p.ReportStatus(sel.resp.StatusCode)
+		p.Release()
+		return nil, fmt.Errorf("api error %d: %s", sel.resp.StatusCode, truncate(string(raw), 500))
+	}
 	go func() {
 		defer p.Release()
 		defer close(ch)
-		sel := <-rc
-		if sel.err != nil {
-			p.reportError()
-			return
-		}
 		defer sel.resp.Body.Close()
-		if sel.resp.StatusCode != 200 {
-			raw, _ := io.ReadAll(sel.resp.Body)
-			p.ReportStatus(sel.resp.StatusCode)
-			_ = raw
-			return
-		}
 		scanner := bufio.NewScanner(sel.resp.Body)
 		scanner.Buffer(make([]byte, 0, 64*1024), 1024*1024)
 		for scanner.Scan() {

internal/provider/registry.go

@@ -3,9 +3,11 @@
 package provider
 
 import (
+	"context"
 	"sort"
 	"strings"
 	"sync"
+	"time"
 )
 
 // Registry holds all configured providers and routes model requests.
@@ -143,6 +145,36 @@ func (r *Registry) ProviderForModel(model string) *Provider {
 	return p
 }
 
+// ProviderForSlot returns the provider for a (model, source) slot. When
+// source is empty it behaves like ProviderForModel (owner of the model id);
+// when source is set it returns only that exact source (nil if the source
+// does not serve the model).
+func (r *Registry) ProviderForSlot(model, source string) *Provider {
+	model = strings.ToLower(strings.TrimSpace(model))
+	source = strings.TrimSpace(source)
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+	if source == "" {
+		p, ok := r.byModel[model]
+		if !ok {
+			return nil
+		}
+		return p
+	}
+	for _, p := range r.providers {
+		if !strings.EqualFold(p.Name(), source) {
+			continue
+		}
+		for _, m := range p.cfg.Models {
+			if strings.EqualFold(m.ID, model) {
+				return p
+			}
+		}
+		return nil
+	}
+	return nil
+}
+
 // Default returns the highest-priority available provider.
 func (r *Registry) Default() *Provider {
 	chain := r.AUTOChain()
@@ -161,6 +193,27 @@ type SourceStatus struct {
 	Available     bool     `json:"available"`
 	Healthy       bool     `json:"healthy"`
 	MaxConcurrent int      `json:"max_concurrent"`
+	LiveAvailable bool     `json:"live_available"`
+	LastError     string   `json:"last_error,omitempty"`
+	LastChecked   int64    `json:"last_checked,omitempty"`
+}
+
+// ProbeAll runs a live reachability check for every provider (in parallel).
+func (r *Registry) ProbeAll(ctx context.Context) {
+	r.mu.RLock()
+	providers := append([]*Provider(nil), r.providers...)
+	r.mu.RUnlock()
+	var wg sync.WaitGroup
+	for _, p := range providers {
+		wg.Add(1)
+		go func(p *Provider) {
+			defer wg.Done()
+			probeCtx, cancel := context.WithTimeout(ctx, 6*time.Second)
+			defer cancel()
+			p.Probe(probeCtx)
+		}(p)
+	}
+	wg.Wait()
 }
 
 func (r *Registry) Status() []SourceStatus {
@@ -168,16 +221,20 @@ func (r *Registry) Status() []SourceStatus {
 	defer r.mu.RUnlock()
 	out := make([]SourceStatus, 0, len(r.providers))
 	for _, p := range r.providers {
-		s := SourceStatus{
+		live, lastErr, lastAt := p.LastProbe()
-			Name:          p.Name(),
+	s := SourceStatus{
-			Adapter:       p.Adapter(),
+		Name:          p.Name(),
-			BaseURL:       p.Config().BaseURL,
+		Adapter:       p.Adapter(),
-			Models:        p.Models(),
+		BaseURL:       p.Config().BaseURL,
-			Available:     p.Available(),
+		Models:        p.Models(),
-			Healthy:       p.Available(),
+		Available:     p.Available(),
-			MaxConcurrent: p.MaxConcurrent(),
+		Healthy:       p.Available(),
-		}
+		MaxConcurrent: p.MaxConcurrent(),
-		out = append(out, s)
+		LiveAvailable: live,
+		LastError:     lastErr,
+		LastChecked:   lastAt,
+	}
+	out = append(out, s)
 	}
 	return out
 }