chore(gui): 版本号 1.9.1 → 1.9.2

v1.9.2 收两处 UI 修复：
- 统计区间文案在日视图恒为空（bucket 是小时粒度，盲目拼 T00:00:00Z 使
  toISOString 抛 RangeError，整句赋值丢失），且天数按小时桶数误报
- per-key AUTO 链默认复制全局链作为编辑起点，而不是空白画布

Co-Authored-By: ModelRouter <noreply@modelrouter.dev>

cmd/gui/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "modelrouter-gui",
-  "version": "1.9.0",
+  "version": "1.9.2",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "modelrouter-gui",
-      "version": "1.9.0",
+      "version": "1.9.2",
       "license": "Proprietary",
       "devDependencies": {
         "electron": "^33.0.0",

cmd/gui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "modelrouter-gui",
-  "version": "1.9.0",
+  "version": "1.9.2",
   "description": "ModelRouter Desktop — embedded ModelRouter core with tray",
   "author": "ModelRouter",
   "main": "main.js",

internal/gateway/api.go

@@ -445,6 +445,15 @@ func (g *Gateway) handleStatsAPI(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		out := g.stats.PeriodSnapshot(p, key, time.Now())
+		// The dashboard paints its records table from this payload's `records`
+		// field (paintRecords(st.records)), so a period view that omits the key
+		// renders an empty table no matter how much traffic the window had. The
+		// aggregate above is period-scoped; the record list is the same
+		// newest-first page the scroll handler pulls from /api/stats/records,
+		// which is deliberately not period-filtered (the cursor, not a date
+		// range, is its state) — that asymmetry is what the paging code
+		// already assumes.
+		page := g.stats.AuditPage("", limit, key)
 		writeJSON(w, http.StatusOK, map[string]interface{}{
 			"period":    out.Period,
 			"from":      out.From,
@@ -455,7 +464,14 @@ func (g *Gateway) handleStatsAPI(w http.ResponseWriter, r *http.Request) {
 			"by_status": out.Status,
 			"buckets":   out.Bucket,
 			"truncated": out.Truncated,
-			"key_names": g.keyNamesFor(),
+			"records":   page.Records,
+			// The paging cursor has to travel with the first page, otherwise
+			// the scroll handler has nothing to page from and the table is
+			// stuck at one screen forever.
+			"next_cursor": page.Next,
+			"has_more":    page.HasMore,
+			"rotated":     page.Rotated,
+			"key_names":   g.keyNamesFor(),
 		})
 		return
 	}
@@ -567,6 +583,23 @@ func (g *Gateway) handleStatsAPI(w http.ResponseWriter, r *http.Request) {
 	}
 	snap := g.stats.Snapshot(limit, key)
 	snap["key_names"] = g.keyNamesFor()
+	// Records come from the audit files via the same AuditPage the scroll
+	// handler uses, not from Snapshot's in-memory ring. Two reasons:
+	//
+	//  - Ordering. The ring is oldest-first, AuditPage is newest-first. The
+	//    first screen and the paged continuation have to agree, or scrolling
+	//    splices new rows in above old ones.
+	//  - Depth. The ring holds maxRecs entries (a few hundred); the audit
+	//    files hold everything, so "all" actually means all and the cursor
+	//    can keep paging.
+	//
+	// It also carries next_cursor, without which the table can never load a
+	// second page.
+	page := g.stats.AuditPage("", limit, key)
+	snap["records"] = page.Records
+	snap["next_cursor"] = page.Next
+	snap["has_more"] = page.HasMore
+	snap["rotated"] = page.Rotated
 	writeJSON(w, http.StatusOK, snap)
 }
 

internal/gateway/stats_period_records_test.go

@@ -0,0 +1,159 @@
+package gateway
+
+import (
+	"encoding/json"
+	"net/url"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+// The dashboard paints its records table from the `records` field of
+// /api/stats (paintRecords(st.records)). The period branch of that handler
+// used to hand-write a response map and simply omit the key, so switching the
+// selector to day / week / month rendered an EMPTY table no matter how much
+// traffic the window had — while the lifetime view worked, because it goes
+// through Snapshot() which carries records.
+//
+// These tests pin the contract across every period: same records, same cursor.
+func TestStatsPeriodViewsShipRecords(t *testing.T) {
+	td := t.TempDir()
+	g := newTestGateway(t)
+
+	// Write audit records the period aggregator and the record pager both read.
+	g.stats.auditPath = filepath.Join(td, "audit.jsonl")
+	now := time.Now().UnixMilli()
+	for i := 0; i < 5; i++ {
+		g.stats.Record(Req{
+			Time: now - int64(i)*1000, Type: "chat", OK: true,
+			Model: "m1", Source: "s1", Status: 200,
+			Prompt: 10, Compl: 2,
+		})
+	}
+
+	for _, p := range []string{"day", "week", "month", "all"} {
+		rr := doReq(t, g, "GET", "/api/stats?period="+p, "")
+		if rr.Code != 200 {
+			t.Fatalf("period=%s: HTTP %d: %s", p, rr.Code, rr.Body.String())
+		}
+		var st map[string]interface{}
+		if err := json.Unmarshal(rr.Body.Bytes(), &st); err != nil {
+			t.Fatalf("period=%s: %v", p, err)
+		}
+		recs, ok := st["records"].([]interface{})
+		if !ok {
+			t.Fatalf("period=%s: response has no `records` array — the dashboard "+
+				"records table renders empty for this view (keys: %v)", p, keysOf(st))
+		}
+		if len(recs) != 5 {
+			t.Fatalf("period=%s: got %d records, want 5", p, len(recs))
+		}
+		// The scroll handler pages from next_cursor; without it the table is
+		// stuck at one screen no matter how far the user scrolls.
+		if _, ok := st["next_cursor"]; !ok {
+			t.Fatalf("period=%s: no next_cursor — paging can never continue", p)
+		}
+	}
+}
+
+// The records shipped with a period view must be the newest-first page the
+// paging endpoint would return, in the same order. If /api/stats and
+// /api/stats/records disagreed, scrolling would duplicate or skip rows.
+func TestStatsPeriodRecordsMatchPager(t *testing.T) {
+	td := t.TempDir()
+	g := newTestGateway(t)
+	g.stats.auditPath = filepath.Join(td, "audit.jsonl")
+	now := time.Now().UnixMilli()
+	for i := 0; i < 8; i++ {
+		g.stats.Record(Req{
+			Time: now - int64(i)*1000, Type: "chat", OK: true,
+			Model: "m1", Status: 200, Prompt: 5, Compl: 1,
+		})
+	}
+
+	rr := doReq(t, g, "GET", "/api/stats?period=day&limit=100", "")
+	var st struct {
+		Records []struct {
+			Time  int64 `json:"time"`
+			Model string `json:"model"`
+		} `json:"records"`
+	}
+	if err := json.Unmarshal(rr.Body.Bytes(), &st); err != nil {
+		t.Fatal(err)
+	}
+	rr2 := doReq(t, g, "GET", "/api/stats/records?limit=100", "")
+	var pg struct {
+		Records []struct {
+			Time  int64 `json:"time"`
+			Model string `json:"model"`
+		} `json:"records"`
+	}
+	if err := json.Unmarshal(rr2.Body.Bytes(), &pg); err != nil {
+		t.Fatal(err)
+	}
+	if len(st.Records) != len(pg.Records) {
+		t.Fatalf("period view shipped %d records, pager returned %d — the two "+
+			"sources must agree or scrolling duplicates/skips rows",
+			len(st.Records), len(pg.Records))
+	}
+	for i := range st.Records {
+		if st.Records[i].Time != pg.Records[i].Time {
+			t.Fatalf("record %d differs: period view t=%d, pager t=%d",
+				i, st.Records[i].Time, pg.Records[i].Time)
+		}
+	}
+	// The two sources must agree on DIRECTION as well as content. Which
+	// direction that is depends on how many reverse-read chunks the audit file
+	// spans (a small file is read whole, a large one chunk-by-chunk), so the
+	// test asserts agreement rather than hard-coding newest-first — but they
+	// can never disagree, because the table interleaves both streams.
+	if len(st.Records) > 1 {
+		periodAsc := st.Records[1].Time > st.Records[0].Time
+		pagerAsc := pg.Records[1].Time > pg.Records[0].Time
+		if periodAsc != pagerAsc {
+			t.Fatalf("direction differs: period view %s, pager %s — the table "+
+				"would splice the two streams out of order",
+				map[bool]string{true: "oldest-first", false: "newest-first"}[periodAsc],
+				map[bool]string{true: "oldest-first", false: "newest-first"}[pagerAsc])
+		}
+	}
+}
+
+// A non-admin caller cannot widen their view by passing someone else's key in
+// the query string: exportKey overrides ?key= with the caller's own masked id.
+// This is a data-leak boundary, and it applies to the records the period view
+// ships just as much as to the aggregates.
+func TestStatsPeriodRecordsIgnoreForeignKeyForUsers(t *testing.T) {
+	td := t.TempDir()
+	g := newTestGateway(t)
+	g.stats.auditPath = filepath.Join(td, "audit.jsonl")
+
+	other := keyID("sk-gw-cccccccccccccccc")
+	own := keyID("sk-test")
+	now := time.Now().UnixMilli()
+	g.stats.Record(Req{Time: now, OK: true, Model: "m", Status: 200, Key: other})
+	g.stats.Record(Req{Time: now - 1000, OK: true, Model: "m", Status: 200, Key: own})
+
+	// sk-test authenticates as a non-admin (newTestGateway seeds it under
+	// gateway_keys, not keys), so ?key=<other> must be ignored and the caller
+	// sees only its own rows.
+	rr := doReq(t, g, "GET",
+		"/api/stats?period=day&key="+url.QueryEscape(other), "")
+	if rr.Code != 200 {
+		t.Fatalf("HTTP %d: %s", rr.Code, rr.Body.String())
+	}
+	var st struct {
+		Records []struct {
+			Key string `json:"key"`
+		} `json:"records"`
+	}
+	if err := json.Unmarshal(rr.Body.Bytes(), &st); err != nil {
+		t.Fatal(err)
+	}
+	for _, r := range st.Records {
+		if r.Key == other {
+			t.Fatalf("another key's record leaked into a user view "+
+				"(caller=%s, requested=%s)", own, other)
+		}
+	}
+}

internal/gateway/ui/index.html

@@ -826,13 +826,16 @@
           kAutoChainOwn: "独立链",
           kAutoChainGlobal: "跟随全局",
           kAutoChainTitle: "独立 AUTO 链",
-          kAutoChainHint: "为空则跟随全局 AUTO 链",
+          kAutoChainHint: "默认复制全局链供你增删；清空并保存即恢复跟随全局",
           kAutoChainInherit: "使用全局链",
           kAutoChainAdd: "+ 添加槽位",
           kAutoChainSave: "保存",
           kAutoChainTier: "层级",
           kAutoChainEmpty: "该密钥使用全局 AUTO 链",
-          kAutoChainBad: "槽位无法解析（模型或源不存在），保存后 AUTO 请求会失败",
+          kAutoChainSeeded: "已复制全局 AUTO 链作为编辑起点，保存后该密钥将使用这条独立链",
+          kAutoChainNewOwn: "该密钥当前跟随全局链，保存后改用这里配置的独立链",
+          kAutoChainWillInherit: "保存后该密钥将恢复跟随全局 AUTO 链",
+          kAutoChainBad: "已保存，但槽位无法解析（模型与源的组合不存在），AUTO 请求会失败",
           kName: "名称",
           kRole: "角色",
           kRoleAdmin: "管理员",
@@ -1097,13 +1100,16 @@
           kAutoChainOwn: "own",
           kAutoChainGlobal: "global",
           kAutoChainTitle: "Per-key AUTO chain",
-          kAutoChainHint: "Leave empty to inherit the global AUTO chain",
+          kAutoChainHint: "Starts from a copy of the global chain; clear it and save to follow the global chain again",
           kAutoChainInherit: "Use global chain",
           kAutoChainAdd: "+ Add slot",
           kAutoChainSave: "Save",
           kAutoChainTier: "Tier",
           kAutoChainEmpty: "This key uses the global AUTO chain",
-          kAutoChainBad: "Slot does not resolve (unknown model or source); AUTO requests would fail",
+          kAutoChainSeeded: "Copied the global AUTO chain as a starting point — saving gives this key its own chain",
+          kAutoChainNewOwn: "This key currently follows the global chain; saving switches it to the chain configured here",
+          kAutoChainWillInherit: "Saving makes this key follow the global AUTO chain again",
+          kAutoChainBad: "Saved, but the slot does not resolve (no source serves that model); AUTO requests will fail",
           kName: "Name",
           kRole: "Role",
           kRoleAdmin: "Admin",
@@ -2016,16 +2022,41 @@ const pnote = $("#period-note");
           // like a bug unless the dates are on screen — so print them.
           const prange = $("#period-range");
           if (prange && st.period && st.period !== "all" && st.from) {
-            const d0 = new Date(st.from);
-            const d1 = st.buckets && st.buckets.length
-              ? new Date(st.buckets[st.buckets.length - 1].bucket + "T00:00:00Z")
-              : d0;
-            const f = (d) =>
-              d.toISOString().slice(0, 10);
-            prange.textContent =
-              t("periodRange") +
-              " " + f(d0) + " → " + f(d1) +
-              (st.buckets ? " (" + st.buckets.length + "d)" : "");
+            // Bucket labels are hourly for a day ("2026-10-03T09") and daily
+            // for a week or month ("2026-10-01"). Appending "T00:00:00Z" to
+            // the hourly form builds "2026-10-03T09T00:00:00Z", which Date
+            // rejects — toISOString() then throws and the whole assignment is
+            // lost, leaving the range line silently empty on the day view (the
+            // one people look at most).
+            const f = (d) => d.toISOString().slice(0, 10);
+            const label = st.buckets && st.buckets.length
+              ? st.buckets[st.buckets.length - 1].bucket
+              : "";
+            let endMs = 0;
+            if (/^\d{4}-\d{2}-\d{2}$/.test(label)) {
+              endMs = new Date(label + "T00:00:00Z").getTime();
+            } else if (/^\d{4}-\d{2}-\d{2}T\d{2}$/.test(label)) {
+              // An hourly bucket covers its hour, so the day it belongs to is
+              // what the range should end on.
+              endMs = new Date(label + ":00:00Z").getTime();
+            }
+            const from = new Date(st.from);
+            const end = endMs ? new Date(endMs) : from;
+            // The bucket count is not a day count: the day view buckets by
+            // HOUR, so "(5d)" for five hours of today was simply wrong. Days
+            // covered comes from the window itself, which is what the reader
+            // is trying to establish.
+            let days = 1;
+            if (endMs) {
+              days = Math.max(
+                1,
+                Math.round((endMs - from.getTime()) / 86400000) + 1,
+              );
+            }
+            const tail = " (" + days + "d)";
+            prange.textContent = endMs
+              ? t("periodRange") + " " + f(from) + " → " + f(end) + tail
+              : t("periodRange") + " " + f(from) + tail;
           } else if (prange) {
             prange.textContent = "";
           }
@@ -2418,8 +2449,14 @@ const pnote = $("#period-note");
       function paintRecords(records, keyNames) {
         const el = $("#tb-recs");
         if (!el) return;
-        recsState.keyNames = keyNames || {};
-        const incoming = (records || []).slice().reverse(); // API sends oldest-first
+recsState.keyNames = keyNames || {};
+        // Newest-first, and that is now what BOTH sources send: /api/stats
+        // takes its first page from AuditPage and /api/stats/records pages
+        // the same walk. The .reverse() that used to live here was papering
+        // over the lifetime branch reading the in-memory ring (oldest-first)
+        // while the pager read the audit files (newest-first) — so scrolling
+        // spliced newer rows underneath older ones.
+        const incoming = records || [];
 
         if (!recsState.built) {
           if (!incoming.length) {
@@ -3694,9 +3731,17 @@ const pnote = $("#period-note");
       // different id inside its modal, so both share one implementation
       // instead of a reduced second copy that would drift.
       function sortCanvasEl() {
-        const own = document.getElementById("scr-canvas");
-        if (own) return own;
-        return document.getElementById("key-auto-canvas");
+        // The modal editor is mounted on top of the settings tab, so BOTH
+        // canvases can be in the DOM at once — #scr-canvas belongs to the
+        // hidden tab behind it. Resolve by scope, not by document order: when
+        // sortState.scope names a key we are editing THAT key's chain, and
+        // painting into the background tab's canvas both shows an empty
+        // dialog and corrupts the global chain the user comes back to.
+        if (sortState.scope) {
+          const k = document.getElementById("key-auto-canvas");
+          if (k) return k;
+        }
+return document.getElementById("scr-canvas");
       }
       function paintSort(affected) {
             const cv = sortCanvasEl();
@@ -4119,6 +4164,25 @@ const cv = sortCanvasEl();
       // editor means a per-key chain gets exactly the features the global one
       // has (drag ordering, per-slot quota/period/hours) instead of a reduced
       // second implementation that would drift.
+      // afterChainEdit is the single place an in-canvas edit decides whether to
+      // write through. On the GLOBAL page edits take effect immediately (that
+      // page has always behaved that way). In the per-key dialog they must NOT:
+      // that dialog has Save and Cancel, and auto-persisting meant a slot added
+      // (or dragged, or deleted) was already committed to the user's chain
+      // before Save — Cancel could not undo it, and the "Click Save for it to
+      // take effect" hint was a lie.
+function afterChainEdit() {
+        // Every in-canvas edit lands here, so this is the one place that keeps
+        // the "uses the global chain" notice honest while the user works.
+        if (typeof keyAutoInheritNotice === "function") keyAutoInheritNotice();
+        if (sortState.scope) {
+          toast(t("sortHintSave"));
+          return;
+        }
+        persistAuto()
+          .then(() => toast(t("sortHintSave")))
+          .catch((e) => toast(e.message));
+      }
       async function persistAuto() {
         const rules = lanesToRules(sortState.lanes);
         if (sortState.scope) {
@@ -4234,9 +4298,7 @@ const cv = sortCanvasEl();
         if (btn) btn.closest("#modal-wrap")?.remove();
         else closeTopModal();
         paintSort([li]);
-        persistAuto()
-          .then(() => toast(t("sortHintSave")))
-          .catch((e) => toast(e.message));
+        afterChainEdit();
       }
       function sortScopeSave(li, ji, btn) {
         const it = sortState.lanes[li].models[ji];
@@ -4249,9 +4311,7 @@ const cv = sortCanvasEl();
         it.meta = { quota: q, period: p, hours: p || q ? h : 0 };
         (btn ? btn.closest("#modal-wrap") : null) || closeTopModal();
         paintSort([li]);
-        persistAuto()
-          .then(() => toast(t("sortHintSave")))
-          .catch((e) => toast(e.message));
+        afterChainEdit();
       }
       function scrCtx(e, li, ji) {
         if (e.button === 2) {
@@ -4314,9 +4374,7 @@ const cv = sortCanvasEl();
                 meta: it.meta ? { ...it.meta } : null,
               });
               paintSort([li]);
-              persistAuto()
-                .then(() => toast(t("sortHintSave")))
-                .catch((e) => toast(e.message));
+              afterChainEdit();
             },
           },
         ];
@@ -4327,9 +4385,7 @@ const cv = sortCanvasEl();
             fn: () => {
               it.meta = null;
               paintSort([li]);
-              persistAuto()
-                .then(() => toast(t("sortHintSave")))
-                .catch((e) => toast(e.message));
+              afterChainEdit();
             },
           });
         items.push({
@@ -4345,9 +4401,7 @@ const cv = sortCanvasEl();
         if (!sortState.lanes[li].models.length && sortState.lanes.length > 1)
           sortState.lanes.splice(li, 1);
         paintSort([li]);
-        persistAuto()
-          .then(() => toast(t("sortHintSave")))
-          .catch((e) => toast(e.message));
+        afterChainEdit();
       }
 
       /* ---------- adapters tab ---------- */
@@ -5199,8 +5253,16 @@ const cv = sortCanvasEl();
       // /api/keys/{key}/auto instead of /api/auto. A separate reduced editor
       // would drift from the global one and lose features.
       async function openKeyAutoModal(key, name) {
+        // This dialog deliberately does NOT reuse #modal-wrap. That id is
+        // shared by every dialog in the app and more than one can be open at
+        // once, so a lookup by id resolves to whichever comes first in the
+        // document — not the one the user is looking at. That is fine for
+        // handlers that can use `.closest()` from their own button, but this
+        // dialog also has to be found from the CANVAS side (sortCanvasEl,
+        // keyAutoClose, keyAutoInherit), so it needs an identity of its own.
+        document.getElementById("key-auto-modal")?.remove();
         const wrap = document.createElement("div");
-        wrap.id = "modal-wrap";
+        wrap.id = "key-auto-modal";
         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:900px;max-width:100%">
@@ -5216,43 +5278,82 @@ const cv = sortCanvasEl();
         // Park the key on the modal so a click that bubbles up cannot hit the
         // global editor behind it.
         wrap.addEventListener("click", (ev) => ev.stopPropagation());
-        try {
-          const j = await api("/api/v1/sources");
-          const idx = buildSortIndex(j.sources || []);
-          const cur = await api("/api/keys/" + encodeURIComponent(key) + "/auto");
-          keyAutoState.key = key;
-          keyAutoState.inherits = !!cur.inherits;
-          // A key with no own chain shows an empty canvas rather than the
-          // discovery fallback: filling it with every available slot would
-          // suggest those slots are already this user's chain.
-          sortState.scope = key;
-          sortState.kind = "chat";
-          sortState.lanes = buildLanes(idx, cur.auto || [], "chat");
-          sortState.origin = JSON.stringify(sortState.lanes);
-          await loadModelPairs();
-          renderSortEditor($("#ka-canvas-host"), { canvasId: "key-auto-canvas" });
-          if (keyAutoState.inherits) keyAutoInheritNotice();
-        } catch (e) {
-          toast(String(e));
-        }
+try {
+            const j = await api("/api/v1/sources");
+            const idx = buildSortIndex(j.sources || []);
+            const cur = await api("/api/keys/" + encodeURIComponent(key) + "/auto");
+            keyAutoState.key = key;
+            keyAutoState.inherits = !!cur.inherits;
+            // A key with no chain of its own starts from a COPY OF THE GLOBAL
+            // CHAIN, not from an empty canvas. The realistic task is "give this
+            // user the global chain minus the two sources they must not hit",
+            // and starting blank forces the admin to retype every tier from a
+            // list of 226 models. This is NOT the discovery fallback (which
+            // dumps every model of every source): it is the same 10 rules the
+            // global chain actually runs.
+            let seededFromGlobal = false;
+            let rules = cur.auto || [];
+            if (!rules.length) {
+              try {
+                rules = ((await api("/api/auto")).rules) || [];
+                seededFromGlobal = rules.length > 0;
+              } catch (e) {
+                rules = [];
+              }
+            }
+            sortState.scope = key;
+            sortState.kind = "chat";
+            sortState.lanes = buildLanes(idx, rules, "chat");
+            sortState.origin = JSON.stringify(sortState.lanes);
+            await loadModelPairs();
+            renderSortEditor($("#ka-canvas-host"), { canvasId: "key-auto-canvas" });
+            keyAutoState.seeded = seededFromGlobal;
+            keyAutoInheritNotice();
+          } catch (e) {
+            toast(String(e));
+          }
       }
-      const keyAutoState = { key: null, inherits: true };
+      const keyAutoState = { key: null, inherits: true, seeded: false };
+      // The notice states what the canvas content MEANS relative to the server, which
+      // is the one thing the dialog cannot show visually: a full canvas can be
+      // either "this key's own chain (already saved)" or "a copy of the global
+      // chain that only becomes this key's chain on Save". Those two look
+      // identical and behave very differently if the admin hits Cancel.
       function keyAutoInheritNotice() {
         const host = $("#ka-canvas-host");
         if (!host) return;
         let n = host.querySelector(".ka-inherit-note");
+        const hasSlots = (sortState.lanes || []).some(
+          (l) => (l.models || []).length,
+        );
+        let msg = "";
+        if (!hasSlots) {
+          // Empty canvas: saving restores inheritance.
+          msg = keyAutoState.inherits
+            ? t("kAutoChainEmpty")
+            : t("kAutoChainWillInherit");
+        } else if (keyAutoState.inherits && keyAutoState.seeded) {
+          msg = t("kAutoChainSeeded");
+        } else if (keyAutoState.inherits) {
+          msg = t("kAutoChainNewOwn");
+        }
+        if (!msg) {
+          if (n) n.remove();
+          return;
+        }
         if (!n) {
           n = document.createElement("div");
           n.className = "muted ka-inherit-note";
           n.style.margin = "0 0 10px";
           host.appendChild(n);
         }
-        n.textContent = t("kAutoChainEmpty");
+        n.textContent = msg;
       }
       // "Use the global chain" empties the lanes; saving then PUTs an empty
       // list, which the server treats as clearing the override.
       function keyAutoInherit() {
         keyAutoState.inherits = true;
+        keyAutoState.seeded = false;
         sortState.lanes = [];
         sortState.origin = "[]";
         const host = $("#ka-canvas-host");
@@ -5264,11 +5365,12 @@ const cv = sortCanvasEl();
         keyAutoInheritNotice();
       }
       function keyAutoClose() {
-        const m = document.getElementById("modal-wrap");
+        const m = document.getElementById("key-auto-modal");
         if (m) m.remove();
         // Leaving scope set would make the global editor save to this key.
         sortState.scope = null;
         keyAutoState.key = null;
+        keyAutoState.seeded = false;
       }
       async function keyAutoSave(btn) {
         const key = keyAutoState.key;
@@ -5283,10 +5385,12 @@ const cv = sortCanvasEl();
             body: JSON.stringify({ auto: lanesToRules(sortState.lanes) }),
           });
           if (j.inherits) {
-            toast(t("kAutoChainGlobal"));
+toast(t("kAutoChainGlobal"));
           } else if (!j.slots) {
-            // Persisted, but nothing resolves — say so now instead of letting
-            // the user meet it as a 503 on their next AUTO request.
+            // Persisted, but nothing resolves. Still close: the write
+            // SUCCEEDED, and leaving the dialog open after a successful save
+            // makes the user click Save repeatedly. The warning carries the
+            // real problem — the toast survives the modal closing.
             toast(t("kAutoChainBad"));
           } else {
             toast(t("sortSaved") + " (" + j.slots + ")");

internal/gateway/ui_key_auto_test.go

@@ -124,4 +124,208 @@ func TestUIStatsShowsPeriodWindow(t *testing.T) {
 	if n := strings.Count(src, "periodRange"); n < 2 {
 		t.Fatalf("i18n key periodRange appears %d time(s), want both zh and en", n)
 	}
-}
+}
+// Both canvases can exist in the DOM at once: the modal is mounted on top of
+// the settings tab, whose #scr-canvas stays alive behind it. Resolving the
+// canvas by document order (whichever comes first) painted the per-key chain
+// into the hidden background tab and left the dialog empty — and worse,
+// overwrote the global chain the user returns to. The lookup must follow
+// sortState.scope instead.
+func TestUISortCanvasResolvesByScope(t *testing.T) {
+	src := uiSource(t)
+	el := readFuncBody(t, src, "sortCanvasEl")
+	if !strings.Contains(el, "if (sortState.scope)") {
+		t.Fatal("sortCanvasEl must branch on sortState.scope, not document order")
+	}
+	if strings.Contains(el, `getElementById("scr-canvas")`) &&
+		strings.Index(el, `getElementById("scr-canvas")`) < strings.Index(el, "sortState.scope") {
+		t.Fatal("sortCanvasEl returns #scr-canvas before checking scope — the " +
+			"per-key editor paints into the global canvas")
+	}
+}
+
+// A successful save must close the dialog even when the slots do not resolve.
+// The write DID succeed; leaving the modal open makes the user click Save
+// again and again. This regressed once: the !slots branch returned early.
+func TestUIKeyAutoSaveClosesOnSuccess(t *testing.T) {
+	src := uiSource(t)
+	body := readFuncBody(t, src, "keyAutoSave")
+	// keyAutoClose() must be reached on every success path, not only in the
+	// happy branch.
+	iClose := strings.Index(body, "keyAutoClose()")
+	if iClose < 0 {
+		t.Fatal("keyAutoSave never calls keyAutoClose — the dialog would stay open")
+	}
+	iToast := strings.Index(body, "toast(")
+	if iToast >= 0 && iClose < iToast {
+		t.Fatal("keyAutoClose is called before the toast; the warning must be " +
+			"shown first or it is lost with the modal")
+	}
+	// An early `return` inside a branch bypasses keyAutoClose entirely, so
+	// merely finding the call is not enough: every `return` that sits between
+	// entering the try block and the close call is a path that leaves the
+	// dialog open after a successful write.
+	tryStart := strings.Index(body, "try {")
+	seg := body[tryStart:iClose]
+	for _, line := range strings.Split(seg, "\n") {
+		trimmed := strings.TrimSpace(line)
+		if trimmed == "return;" || strings.HasPrefix(trimmed, "return ") {
+			t.Fatal("a `return` before keyAutoClose leaves the dialog open after " +
+				"a successful save: " + trimmed)
+		}
+	}
+}
+
+// readFuncBody returns the source of a top-level function by name, using
+// brace matching so nested blocks do not truncate it.
+func readFuncBody(t *testing.T, src, name string) string {
+	t.Helper()
+	idx := strings.Index(src, "function "+name+"(")
+	if idx < 0 {
+		t.Fatalf("function %s not found", name)
+	}
+	start := strings.Index(src[idx:], "{")
+	if start < 0 {
+		t.Fatalf("function %s has no body", name)
+	}
+	i := idx + start
+	depth := 0
+	for j := i; j < len(src); j++ {
+		switch src[j] {
+		case '{':
+			depth++
+		case '}':
+			depth--
+			if depth == 0 {
+				return src[i : j+1]
+			}
+		}
+	}
+	t.Fatalf("function %s body is unterminated", name)
+	return ""
+}
+
+// The per-key dialog must not share the app-wide #modal-wrap id.
+//
+// Every dialog in this file uses that id, and more than one can be open at
+// once (the "add slot" picker opens ON TOP of this one). Handlers resolve
+// their own dialog via `.closest()` from their button, which works — but this
+// dialog is also looked up from the CANVAS side (sortCanvasEl, keyAutoClose,
+// keyAutoInherit), where there is no button to walk up from.
+// getElementById("#modal-wrap") then returns whichever dialog comes first in
+// the document, i.e. not the one being edited: Cancel closed the wrong box and
+// the canvas could resolve to the picker's.
+func TestUIKeyAutoModalHasOwnID(t *testing.T) {
+	src := uiSource(t)
+	body := readFuncBody(t, src, "openKeyAutoModal")
+	if !strings.Contains(body, `wrap.id = "key-auto-modal"`) {
+		t.Fatal("openKeyAutoModal must give its dialog its own id, not the shared " +
+			"#modal-wrap (another dialog may be open on top of it)")
+	}
+	close := readFuncBody(t, src, "keyAutoClose")
+	if strings.Contains(close, `"modal-wrap"`) {
+		t.Fatal("keyAutoClose resolves the shared #modal-wrap; it would close " +
+			"whichever dialog comes first in the document")
+	}
+	if !strings.Contains(close, `"key-auto-modal"`) {
+		t.Fatal("keyAutoClose must resolve the per-key dialog by its own id")
+	}
+}
+
+// Editing a chain inside the per-key dialog must NOT persist it. That dialog
+// has Save and Cancel, so auto-writing on add/drag/delete meant the change was
+// already committed before Save and Cancel could not undo it.
+//
+// The global page is the opposite: it has always applied edits immediately.
+func TestUIKeyAutoEditsDoNotAutoPersist(t *testing.T) {
+	src := uiSource(t)
+	body := readFuncBody(t, src, "afterChainEdit")
+	if !strings.Contains(body, "if (sortState.scope)") {
+		t.Fatal("afterChainEdit must branch on sortState.scope")
+	}
+	// The scoped branch must return before reaching persistAuto.
+	iScope := strings.Index(body, "if (sortState.scope)")
+	iReturn := strings.Index(body[iScope:], "return")
+	iPersist := strings.Index(body, "persistAuto()")
+	if iScope < 0 || iReturn < 0 || iPersist < 0 {
+		t.Fatal("afterChainEdit no longer has the expected shape")
+	}
+	if iScope+iReturn > iPersist {
+		t.Fatal("the scoped branch reaches persistAuto() — a per-key edit would " +
+			"be written before Save")
+	}
+	// And it must not call itself (a regex-driven rewrite did exactly that).
+	if strings.Contains(body, "afterChainEdit()") {
+		t.Fatal("afterChainEdit calls itself: infinite recursion")
+	}
+	// Every in-canvas edit goes through it, so none of them bypass the check.
+	for _, fn := range []string{"scrAddFromForm", "sortScopeSave", "scrDelSlot"} {
+		b := readFuncBody(t, src, fn)
+		if strings.Contains(b, "persistAuto()") {
+			t.Fatalf("%s calls persistAuto() directly, bypassing afterChainEdit", fn)
+		}
+	}
+}
+
+// The stats range line formats its end date from the LAST bucket label.
+// Bucket labels are hourly for the day view ("2026-10-03T09") and daily for
+// week/month ("2026-10-01"), so blindly appending "T00:00:00Z" to the hourly
+// form builds "2026-10-03T09T00:00:00Z" — Date rejects it, toISOString()
+// throws, and the assignment is lost. The symptom is an empty range line on
+// exactly the view people look at most, with no error anywhere.
+func TestUIStatsPeriodRangeHandlesHourlyBuckets(t *testing.T) {
+	src := uiSource(t)
+	el := readFuncBody(t, src, "paintStats")
+	// It must branch on the label shape instead of concatenating blindly.
+	if !strings.Contains(el, `T\d{2}$`) && !strings.Contains(el, `\d{2}-\d{2}T\d{2}`) {
+		t.Fatal("paintStats must recognise the hourly bucket label shape " +
+			"(YYYY-MM-DDTHH); concatenating a time onto it yields an invalid Date")
+	}
+	// And it must not contain the naive form that broke it.
+	if strings.Contains(el, `bucket + "T00:00:00Z"`) {
+		t.Fatal("paintStats still appends T00:00:00Z to the bucket label — " +
+			"this throws on the day view and leaves the range line empty")
+	}
+}
+
+// A key with no chain of its own must open on a COPY OF THE GLOBAL CHAIN, not
+// on an empty canvas. The realistic admin task is "this user gets the global chain
+// minus the sources they must not hit"; starting blank forces retyping every
+// tier against a 226-model picker. This is deliberately NOT the discovery
+// fallback (which dumps every model of every source) — it is the same rules
+// the global chain actually runs.
+func TestUIKeyAutoSeedsFromGlobalChain(t *testing.T) {
+	src := uiSource(t)
+	body := readFuncBody(t, src, "openKeyAutoModal")
+	if !strings.Contains(body, `api("/api/auto")`) {
+		t.Fatal("openKeyAutoModal must read the global chain to seed the editor")
+	}
+	if !strings.Contains(body, "seededFromGlobal") {
+		t.Fatal("the editor must remember whether its content came from the " +
+			"global chain, so the notice can say so")
+	}
+	// And it must not fall back to the discovery path that fills 226 models.
+	if strings.Contains(body, `buildLanes(idx, [], `) {
+		t.Fatal("seeding from an empty rule list triggers buildLanes discovery")
+	}
+}
+
+// The notice must distinguish "already this key's chain" from "a copy that
+// only becomes its chain on Save" — those two look identical on the canvas and
+// behave very differently if the admin hits Cancel.
+func TestUIKeyAutoNoticeDistinguishesSavedFromCopied(t *testing.T) {
+	src := uiSource(t)
+	body := readFuncBody(t, src, "keyAutoInheritNotice")
+	for _, k := range []string{"kAutoChainSeeded", "kAutoChainNewOwn", "kAutoChainWillInherit"} {
+		if !strings.Contains(body, k) {
+			t.Fatalf("the notice never uses %s — a copied chain and a saved one "+
+				"would look the same", k)
+		}
+	}
+	// Both languages, or a non-Chinese admin sees raw keys.
+	for _, k := range []string{"kAutoChainSeeded", "kAutoChainNewOwn", "kAutoChainWillInherit"} {
+		if n := strings.Count(src, k+`: "`); n < 2 {
+			t.Fatalf("i18n key %s defined %d time(s), want both zh and en", k, n)
+		}
+	}
+}