fix(dashboard): hide disabled provider connections from combo builder

The combos page's fetchData() only filtered available connections by
testStatus ("active"/"success"), so a connection the user had
explicitly disabled (isActive: false) could still show up in the
combo builder if it carried a stale testStatus from before it was
disabled.

Add filterActiveConnections() in src/shared/utils/connectionStatus.ts
and apply it ahead of the existing testStatus filter.

Co-authored-by: itolstov <attid0@gmail.com>
Inspired-by: https://github.com/decolua/9router/pull/2526

src/app/(dashboard)/dashboard/combos/page.tsx

@@ -13,6 +13,7 @@ import Modal from "@/shared/components/Modal";
 import Toggle from "@/shared/components/Toggle";
 import Tooltip from "@/shared/components/Tooltip";
 import { useCopyToClipboard } from "@/shared/hooks/useCopyToClipboard";
+import { filterActiveConnections } from "@/shared/utils/connectionStatus";
 import { FieldLabelWithHelp, WeightTotalBar } from "./parts";
 import { ResponseValidationEditor, type ResponseValidationValue } from "./ResponseValidationEditor";
 import ReasoningTokenBufferToggle from "./ReasoningTokenBufferToggle";
@@ -768,7 +769,10 @@ export default function CombosPage() {
 
       if (combosRes.ok) setCombos((combosData.combos || []).filter((c) => !c.isHidden));
       if (providersRes.ok) {
-        const active = (providersData.connections || []).filter(
+        // Exclude connections the user has explicitly disabled (isActive === false)
+        // before applying the test-status filter — a disabled connection can still
+        // carry a stale "active"/"success" testStatus from before it was disabled.
+        const active = filterActiveConnections(providersData.connections || []).filter(
           (c) => c.testStatus === "active" || c.testStatus === "success"
         );
         setActiveProviders(active);

src/shared/utils/connectionStatus.ts

@@ -0,0 +1,26 @@
+/**
+ * Shared helpers for filtering/classifying provider connections by their
+ * active/disabled state, independent of their last test result.
+ *
+ * A connection can have `isActive: false` (explicitly disabled by the user)
+ * while still carrying a stale `testStatus` of "active"/"success" from
+ * before it was disabled — callers that only filter on `testStatus` will
+ * incorrectly keep serving disabled connections.
+ */
+
+export interface ConnectionActiveFlag {
+  isActive?: boolean;
+  [key: string]: unknown;
+}
+
+/**
+ * Filters out connections that have been explicitly disabled
+ * (`isActive === false`). Connections without an `isActive` field are
+ * treated as active for backward compatibility.
+ */
+export function filterActiveConnections<T extends ConnectionActiveFlag>(
+  connections: T[] | null | undefined
+): T[] {
+  if (!Array.isArray(connections)) return [];
+  return connections.filter((connection) => connection?.isActive !== false);
+}

tests/unit/connection-status-filter-active-2526.test.ts

@@ -0,0 +1,47 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+
+import { filterActiveConnections } from "@/shared/utils/connectionStatus";
+
+// Ported from decolua/9router#2526 — the combos builder listed provider
+// connections the user had explicitly disabled, because the page only
+// filtered on the connection's last `testStatus` and ignored `isActive`.
+// A disabled connection can still carry a stale "active"/"success"
+// testStatus from before it was disabled.
+
+test("filterActiveConnections excludes explicitly disabled connections", () => {
+  const active = { id: "active", isActive: true };
+  const legacyActive = { id: "legacy" }; // no isActive field -> treated as active
+  const disabled = { id: "disabled", isActive: false };
+
+  assert.deepEqual(filterActiveConnections([active, disabled, legacyActive]), [
+    active,
+    legacyActive,
+  ]);
+});
+
+test("filterActiveConnections returns an empty list for invalid input", () => {
+  assert.deepEqual(filterActiveConnections(undefined), []);
+  assert.deepEqual(filterActiveConnections(null), []);
+});
+
+test("combos page fetchData filter mirrors filterActiveConnections + testStatus gate", () => {
+  // Regression for the exact bug: a disabled connection with a stale
+  // "active" testStatus must NOT survive the combined filter used in
+  // src/app/(dashboard)/dashboard/combos/page.tsx fetchData().
+  const connections = [
+    { id: "healthy", isActive: true, testStatus: "active" },
+    { id: "disabled-but-stale-status", isActive: false, testStatus: "active" },
+    { id: "disabled-success-status", isActive: false, testStatus: "success" },
+    { id: "enabled-not-tested", isActive: true, testStatus: "untested" },
+  ];
+
+  const result = filterActiveConnections(connections).filter(
+    (c) => c.testStatus === "active" || c.testStatus === "success"
+  );
+
+  assert.deepEqual(
+    result.map((c) => c.id),
+    ["healthy"]
+  );
+});