Add gated Placement F2 pack skeleton for satellite xy.

Propose positions only from PCB footprints plus numeric decoupling max_distance_mm; otherwise skip with an explicit reason.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/lib/api.ts

@@ -22,6 +22,7 @@ import type {
   NetlistPreviewDesignator,
   PauseCheckpoint,
   PlacementPlan,
+  PlacementPack,
   Project,
   SkippedComponent,
   ValidationReport,
@@ -618,6 +619,15 @@ export async function fetchPlacementPlan(projectId: string): Promise<PlacementPl
   return res.json();
 }
 
+export async function fetchPlacementPack(projectId: string): Promise<PlacementPack> {
+  const res = await authFetch(`${BASE}/api/pipeline/${projectId}/placement/pack`);
+  if (!res.ok) {
+    const err = await res.json().catch(() => ({ detail: "Placement pack not found" }));
+    throw new Error(err.detail || "Placement pack not found");
+  }
+  return res.json();
+}
+
 // --- Logs ---
 
 export async function fetchProjectLogs(

frontend/src/lib/types.ts

@@ -330,6 +330,24 @@ export interface PlacementPlan {
   groups: PlacementIcGroup[];
 }
 
+export interface PlacementProposal {
+  ref: string;
+  anchor_ref: string;
+  rule_kind: string;
+  max_distance_mm: number;
+  proposed_x: number;
+  proposed_y: number;
+  layer?: string;
+  basis?: string;
+}
+
+export interface PlacementPack {
+  objective?: string;
+  status: "packed" | "skipped";
+  skip_reason?: string | null;
+  placements: PlacementProposal[];
+}
+
 // One entry per EDIF sub-design (`&NNNN` ID prefix). Returned by the upload
 // endpoint and the subdesigns inspection endpoint; consumed by the wizard's
 // sub-design picker step.