chore: initialize repository baseline

Import the existing Electron + React + TypeScript app as the version-control
baseline before the scanner rework (C# input/capture sidecar, resolution-anchored
layout profiles, OCR preprocessing, eval harness, rescan-merge, GOOD interop).

Housekeeping in this commit:
- Remove orphaned temp_inputhelper_block.ts (duplicate of the input-helper script).
- Ignore .claude/scheduled_tasks.lock local session state.
- Add .gitattributes to normalize line endings (LF in repo).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

electron/ipc/appHandlers.ts

@@ -0,0 +1,51 @@
+import { ipcMain } from "electron";
+import type {
+  BooleanResult,
+  FocusGenshinResult,
+  RuntimeInfo,
+  SaveSnapshotResult,
+  ScannerStatusPayload,
+} from "../../src/types/global.js";
+import type { AppSnapshot } from "../../src/types/domain.js";
+
+interface AppCommandDependencies {
+  focusMainWindow: () => BooleanResult;
+  moveMainWindowOffGenshin: () => Promise<void>;
+  focusGenshinForScanStart: () => Promise<FocusGenshinResult>;
+  publishScannerStatus: (status: ScannerStatusPayload) => Promise<BooleanResult>;
+  getRuntimeInfo: () => Promise<RuntimeInfo>;
+  loadSnapshot: () => Promise<AppSnapshot | null>;
+  saveSnapshot: (snapshot: AppSnapshot) => Promise<SaveSnapshotResult>;
+  runMockScan: () => Promise<AppSnapshot | null>;
+  showOverlay: () => Promise<BooleanResult>;
+  hideOverlay: () => Promise<BooleanResult>;
+}
+
+export function registerAppHandlers({
+  focusMainWindow,
+  moveMainWindowOffGenshin,
+  focusGenshinForScanStart,
+  publishScannerStatus,
+  getRuntimeInfo,
+  loadSnapshot,
+  saveSnapshot,
+  runMockScan,
+  showOverlay,
+  hideOverlay,
+}: AppCommandDependencies) {
+  ipcMain.handle("app:focusMainWindow", async () => focusMainWindow());
+  ipcMain.handle("automation:focusGenshin", async () => {
+    await moveMainWindowOffGenshin();
+    return focusGenshinForScanStart();
+  });
+  ipcMain.handle("scanner:publishStatus", async (_event, status: ScannerStatusPayload) => {
+    await publishScannerStatus(status);
+    return { ok: true };
+  });
+  ipcMain.handle("app:getRuntimeInfo", async () => getRuntimeInfo());
+  ipcMain.handle("snapshot:load", async () => loadSnapshot());
+  ipcMain.handle("snapshot:save", async (_event, snapshot: AppSnapshot) => saveSnapshot(snapshot));
+  ipcMain.handle("scan:runMock", async () => runMockScan());
+  ipcMain.handle("overlay:show", () => showOverlay());
+  ipcMain.handle("overlay:hide", () => hideOverlay());
+}