diff --git a/src/components/stock-orders/quick-draft-modal.test.tsx b/src/components/stock-orders/quick-draft-modal.test.tsx
index 904a08f..9c372f0 100644
--- a/src/components/stock-orders/quick-draft-modal.test.tsx
+++ b/src/components/stock-orders/quick-draft-modal.test.tsx
@@ -616,3 +616,295 @@ describe("QuickDraftModal — no-history fallback", () => {
     ).toBeInTheDocument();
   });
 });
+
+describe("QuickDraftModal — edit mode", () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("renders only the targeted draft and hides the others", async () => {
+    global.fetch = vi.fn().mockResolvedValue({
+      ok: true,
+      json: async () => ({
+        ok: true,
+        items: [
+          {
+            id: "po-1",
+            purchase_number: "PO26073001STK",
+            supplier: "sup-1",
+            supplier_name: "Steel & Pipe Co",
+            lines: [
+              {
+                id: "line-1",
+                description: "115mm Cutting Disc",
+                quantity: 50,
+                cost_price: 20,
+              },
+            ],
+          },
+          {
+            id: "po-2",
+            purchase_number: "PO26073002STK",
+            supplier: "sup-2",
+            supplier_name: "Hardware Hub",
+            lines: [
+              {
+                id: "line-3",
+                description: "Bolt pack",
+                quantity: 5,
+                cost_price: 100,
+              },
+            ],
+          },
+        ],
+      }),
+    });
+
+    render(
+      <QuickDraftModal
+        open
+        onOpenChange={() => {}}
+        editPurchaseId="po-1"
+      />,
+    );
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(0);
+    });
+
+    expect(screen.getByText(/Steel & Pipe Co/)).toBeInTheDocument();
+    expect(screen.queryByText(/Hardware Hub/)).not.toBeInTheDocument();
+  });
+
+  it("renders edit-mode qty + cost inputs for each line of the targeted draft", async () => {
+    global.fetch = vi.fn().mockResolvedValue({
+      ok: true,
+      json: async () => ({
+        ok: true,
+        items: [
+          {
+            id: "po-1",
+            purchase_number: "PO26073001STK",
+            supplier: "sup-1",
+            supplier_name: "Steel & Pipe Co",
+            lines: [
+              {
+                id: "line-1",
+                description: "115mm Cutting Disc",
+                quantity: 50,
+                cost_price: 20,
+              },
+            ],
+          },
+        ],
+      }),
+    });
+
+    render(
+      <QuickDraftModal
+        open
+        onOpenChange={() => {}}
+        editPurchaseId="po-1"
+      />,
+    );
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(0);
+    });
+
+    const qtyInput = screen.getByTestId(
+      "quick-draft-edit-qty-line-1",
+    ) as HTMLInputElement;
+    expect(qtyInput).toBeInTheDocument();
+    expect(qtyInput.value).toBe("50");
+
+    const costInput = screen.getByTestId(
+      "quick-draft-edit-cost-line-1",
+    ) as HTMLInputElement;
+    expect(costInput).toBeInTheDocument();
+    expect(costInput.value).toBe("20");
+  });
+
+  it("Save PATCHes only the changed fields and refetches cards", async () => {
+    const { toast } = await import("sonner");
+    const successSpy = vi
+      .spyOn(toast, "success")
+      .mockImplementation(() => "");
+
+    global.fetch = vi
+      .fn()
+      // initial cards fetch
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          ok: true,
+          items: [
+            {
+              id: "po-1",
+              purchase_number: "PO26073001STK",
+              supplier: "sup-1",
+              supplier_name: "Steel & Pipe Co",
+              lines: [
+                {
+                  id: "line-1",
+                  description: "115mm Cutting Disc",
+                  quantity: 50,
+                  cost_price: 20,
+                },
+              ],
+            },
+          ],
+        }),
+      })
+      // PATCH response
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({ ok: true }),
+      })
+      // refetch cards after save
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          ok: true,
+          items: [
+            {
+              id: "po-1",
+              purchase_number: "PO26073001STK",
+              supplier: "sup-1",
+              supplier_name: "Steel & Pipe Co",
+              lines: [
+                {
+                  id: "line-1",
+                  description: "115mm Cutting Disc",
+                  quantity: 75,
+                  cost_price: 20,
+                },
+              ],
+            },
+          ],
+        }),
+      });
+
+    render(
+      <QuickDraftModal
+        open
+        onOpenChange={() => {}}
+        editPurchaseId="po-1"
+      />,
+    );
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(0);
+    });
+
+    const qtyInput = screen.getByTestId(
+      "quick-draft-edit-qty-line-1",
+    ) as HTMLInputElement;
+    fireEvent.change(qtyInput, { target: { value: "75" } });
+    fireEvent.click(screen.getByTestId("quick-draft-save-line-line-1"));
+
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(0);
+    });
+
+    const patchCalls = (
+      global.fetch as ReturnType<typeof vi.fn>
+    ).mock.calls.filter(
+      (c) => typeof c[0] === "string" && c[0].includes("/line/line-1"),
+    );
+    expect(patchCalls.length).toBeGreaterThan(0);
+    expect(patchCalls[0][1].method).toBe("PATCH");
+    const body = JSON.parse(patchCalls[0][1].body);
+    expect(body).toEqual({ quantity: 75 });
+    expect(successSpy).toHaveBeenCalledWith("Line updated");
+    successSpy.mockRestore();
+  });
+
+  it("remove still works in edit mode", async () => {
+    global.fetch = vi
+      .fn()
+      // initial cards fetch
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          ok: true,
+          items: [
+            {
+              id: "po-1",
+              purchase_number: "PO26073001STK",
+              supplier: "sup-1",
+              supplier_name: "Steel & Pipe Co",
+              lines: [
+                {
+                  id: "line-1",
+                  description: "115mm Cutting Disc",
+                  quantity: 50,
+                  cost_price: 20,
+                },
+                {
+                  id: "line-2",
+                  description: "Angle grinder",
+                  quantity: 1,
+                  cost_price: 1500,
+                },
+              ],
+            },
+          ],
+        }),
+      })
+      // DELETE response
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({ ok: true }),
+      })
+      // refetch cards after delete
+      .mockResolvedValueOnce({
+        ok: true,
+        json: async () => ({
+          ok: true,
+          items: [
+            {
+              id: "po-1",
+              purchase_number: "PO26073001STK",
+              supplier: "sup-1",
+              supplier_name: "Steel & Pipe Co",
+              lines: [
+                {
+                  id: "line-1",
+                  description: "115mm Cutting Disc",
+                  quantity: 50,
+                  cost_price: 20,
+                },
+              ],
+            },
+          ],
+        }),
+      });
+
+    render(
+      <QuickDraftModal
+        open
+        onOpenChange={() => {}}
+        editPurchaseId="po-1"
+      />,
+    );
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(0);
+    });
+
+    fireEvent.click(screen.getByTestId("quick-draft-remove-line-line-2"));
+
+    await act(async () => {
+      await vi.advanceTimersByTimeAsync(0);
+    });
+
+    const deleteCalls = (
+      global.fetch as ReturnType<typeof vi.fn>
+    ).mock.calls.filter(
+      (c) => typeof c[0] === "string" && c[0].includes("/line/line-2"),
+    );
+    expect(deleteCalls.length).toBe(1);
+    expect(deleteCalls[0][1].method).toBe("DELETE");
+  });
+});