fix: filter codex subthreads during auto import

src/lib/boss-data.ts

@@ -5455,6 +5455,7 @@ export async function upsertDeviceHeartbeat(payload: {
           deviceId: payload.deviceId,
           appliedBy: "system:auto_sync",
           draftId: autoSyncDraft.draftId,
+          pruneMissingCandidates: true,
         });
         draft = applied.draft;
       }
@@ -5824,12 +5825,50 @@ function buildImportedThreadProject(device: Device, candidate: DeviceImportCandi
   });
 }
 
+function candidateThreadSignature(candidate: DeviceImportCandidate) {
+  return (
+    trimToDefined(candidate.codexThreadRef) ??
+    trimToDefined(candidate.threadId) ??
+    `${candidate.folderName}:${candidate.threadDisplayName}`
+  );
+}
+
+function projectThreadSignature(project: Project) {
+  return (
+    trimToDefined(project.threadMeta.codexThreadRef) ??
+    trimToDefined(project.threadMeta.threadId) ??
+    `${project.threadMeta.folderName}:${project.threadMeta.threadDisplayName}`
+  );
+}
+
+function pruneStaleAutoImportedProjectsForDevice(
+  state: BossState,
+  device: Device,
+  selectedCandidates: DeviceImportCandidate[],
+) {
+  const activeSignatures = new Set(selectedCandidates.map((candidate) => candidateThreadSignature(candidate)));
+  const reservedProjectIds = new Set(["master-agent", "boss-console", "audit-collab"]);
+
+  state.projects = state.projects.filter((project) => {
+    if (reservedProjectIds.has(project.id)) return true;
+    if (project.isGroup) return true;
+    if (!project.createdByAgent) return true;
+    if (!project.deviceIds.includes(device.id)) return true;
+    if (project.deviceIds.length !== 1) return true;
+    if (!trimToDefined(project.threadMeta.codexFolderRef) && !trimToDefined(project.threadMeta.folderName)) {
+      return true;
+    }
+    return activeSignatures.has(projectThreadSignature(project));
+  });
+}
+
 function applyDeviceImportResolutionInState(
   state: BossState,
   input: {
     deviceId: string;
     appliedBy: string;
     draftId?: string;
+    pruneMissingCandidates?: boolean;
   },
 ) {
   const draft =
@@ -5844,6 +5883,9 @@ function applyDeviceImportResolutionInState(
   const device = state.devices.find((item) => item.id === input.deviceId);
   if (!device) throw new Error("DEVICE_NOT_FOUND");
 
+  const selectedCandidates = draft.candidates.filter((candidate) =>
+    draft.selectedCandidateIds.includes(candidate.candidateId),
+  );
   const importedProjects: Project[] = [];
   for (const item of resolution.items) {
     const candidate = draft.candidates.find((entry) => entry.candidateId === item.candidateId);
@@ -5890,10 +5932,12 @@ function applyDeviceImportResolutionInState(
     importedProjects.push({ ...targetProject });
   }
 
+  if (input.pruneMissingCandidates) {
+    pruneStaleAutoImportedProjectsForDevice(state, device, selectedCandidates);
+  }
+
   device.projects = dedupeStrings(
-    draft.candidates
-      .filter((candidate) => draft.selectedCandidateIds.includes(candidate.candidateId))
-      .map((candidate) => candidate.folderName),
+    selectedCandidates.map((candidate) => candidate.folderName),
   );
 
   resolution.status = "applied";