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/bootstrap/repositoryContext.ts

@@ -0,0 +1,40 @@
+import {
+  JsonArtifactStoreRepository,
+  JsonSnapshotRepository,
+  ReviewSamplesRepository,
+  ScannerLearningRepository,
+  type ArtifactStoreRepositoryPort,
+  type ReviewSamplesRepositoryPort,
+  type ScannerLearningRepositoryPort,
+  type SnapshotRepositoryPort,
+} from "../repositories/index.js";
+
+import path from "node:path";
+export interface RepositoryContext {
+  artifactStorePath: string;
+  reviewSamplesPath: string;
+  scannerLearningPath: string;
+  snapshotPath: string;
+  artifactStoreRepository: ArtifactStoreRepositoryPort;
+  reviewSamplesRepository: ReviewSamplesRepositoryPort;
+  scannerLearningRepository: ScannerLearningRepositoryPort;
+  snapshotRepository: SnapshotRepositoryPort;
+}
+
+export function createRepositoryContext(userDataPath: string): RepositoryContext {
+  const artifactStorePath = path.join(userDataPath, "artifact-store.json");
+  const reviewSamplesPath = path.join(userDataPath, "review-samples.jsonl");
+  const scannerLearningPath = path.join(userDataPath, "scanner-learning.json");
+  const snapshotPath = path.join(userDataPath, "snapshot.json");
+
+  return {
+    artifactStorePath,
+    reviewSamplesPath,
+    scannerLearningPath,
+    snapshotPath,
+    artifactStoreRepository: new JsonArtifactStoreRepository(userDataPath),
+    reviewSamplesRepository: new ReviewSamplesRepository(userDataPath),
+    scannerLearningRepository: new ScannerLearningRepository(userDataPath),
+    snapshotRepository: new JsonSnapshotRepository(userDataPath),
+  };
+}