fix(editor): seed search with multiline selection

apps/desktop/src/components/editor/EditorSearchPanel.vue

@@ -276,7 +276,7 @@ function openSearch(): boolean {
     cmOpenSearchPanel(v);
     const sel = v.state.selection.main;
     const selText = v.state.sliceDoc(sel.from, sel.to);
-    if (selText && !selText.includes("\n")) {
+    if (selText) {
       searchText.value = selText;
     }
     // Set scope when there's a multi-line selection

apps/desktop/src/components/editor/__tests__/EditorSearchPanel.newlineSeed.spec.ts

@@ -0,0 +1,75 @@
+// @vitest-environment happy-dom
+
+import { EditorState } from "@codemirror/state";
+import { EditorView } from "@codemirror/view";
+import { createApp, defineComponent, h, nextTick, type App } from "vue";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+vi.mock("vue-i18n", () => ({
+  useI18n: () => ({ t: (key: string) => key }),
+}));
+
+vi.mock("@/stores/settingsStore", () => ({
+  useSettingsStore: () => ({
+    editorSettings: { regexMaxMatchCount: 1000 },
+  }),
+}));
+
+import EditorSearchPanel from "@/components/editor/EditorSearchPanel.vue";
+
+const mountedApps: Array<{ app: App; host: HTMLElement }> = [];
+
+beforeEach(() => {
+  vi.useFakeTimers();
+});
+
+afterEach(() => {
+  for (const { app, host } of mountedApps.splice(0)) {
+    app.unmount();
+    host.remove();
+  }
+  vi.useRealTimers();
+});
+
+describe("EditorSearchPanel openSearch selection seeding (issue #5435)", () => {
+  it("seeds the search query with the full selection, newline included, so cross-line matches are found without manually typing \\n", async () => {
+    // Document is exactly the selected text; a correctly seeded (newline-preserving)
+    // search query must find exactly one match. An HTML <input> always strips \n
+    // from its rendered value (browser sanitization), so we assert on the actual
+    // search outcome (rendered match count) rather than the raw input DOM value.
+    const view = new EditorView({
+      parent: document.createElement("div"),
+      state: EditorState.create({ doc: "line one\nline two" }),
+    });
+    view.dispatch({ selection: { anchor: 0, head: view.state.doc.length } });
+
+    let instance: { openSearch: () => boolean } | null = null;
+    const host = document.createElement("div");
+    document.body.append(host);
+    const app = createApp(
+      defineComponent({
+        setup() {
+          return () =>
+            h(EditorSearchPanel, {
+              view,
+              ref: (el) => {
+                instance = el as unknown as { openSearch: () => boolean };
+              },
+            });
+        },
+      }),
+    );
+    app.mount(host);
+    mountedApps.push({ app, host });
+
+    instance!.openSearch();
+    await nextTick();
+    await vi.advanceTimersByTimeAsync(1000);
+    await nextTick();
+
+    expect(host.textContent).toContain("1/1");
+    expect(host.textContent).not.toContain("noResults");
+
+    view.destroy();
+  });
+});