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/repositories/scannerLearningRepository.ts

@@ -0,0 +1,37 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import type { ScannerLearningLoadResult, ScannerLearningRepositoryPort, ScannerLearningRules, ScannerLearningSaveResult } from "./contracts.js";
+
+export class ScannerLearningRepository implements ScannerLearningRepositoryPort {
+  private readonly filePath: string;
+
+  constructor(userDataPath: string, fileName = "scanner-learning.json") {
+    this.filePath = path.join(userDataPath, fileName);
+  }
+
+  async load(): Promise<ScannerLearningLoadResult> {
+    try {
+      const raw = await fs.readFile(this.filePath, "utf8");
+      const parsed = JSON.parse(raw) as ScannerLearningRules;
+      return {
+        ok: true,
+        path: this.filePath,
+        rules: parsed && typeof parsed === "object" ? parsed : { textReplacements: {} },
+      };
+    } catch {
+      return { ok: true, path: this.filePath, rules: { textReplacements: {} } };
+    }
+  }
+
+  async save(rules: ScannerLearningRules): Promise<ScannerLearningSaveResult> {
+    const current = await this.load();
+    const nextTextReplacements = {
+      ...((current.rules as { textReplacements?: Record<string, string> })?.textReplacements ?? {}),
+      ...((rules as { textReplacements?: Record<string, string> })?.textReplacements ?? {}),
+    };
+    const payload: ScannerLearningRules = { textReplacements: nextTextReplacements };
+    await fs.mkdir(path.dirname(this.filePath), { recursive: true });
+    await fs.writeFile(this.filePath, JSON.stringify(payload, null, 2), "utf8");
+    return { ok: true, path: this.filePath, rules: payload, total: Object.keys(nextTextReplacements).length };
+  }
+}