feat(view): standing input and names for the P1 project (운곡교P1 · 운곡교)

- The sample button and ?sample=1 fill the project name 운곡교P1 and the bridge
  name 운곡교. The sample is RAG/운곡교P1입력.xlsx.
- Test: the app's copy stays byte-identical to the RAG file (skipped when the
  RAG folder is absent) and reads one pier, P1, T형, 말뚝기초, 10 bearings.

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>

tests/sample-input.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest';
+import { existsSync, readFileSync } from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import { parseWorkbook } from '../src/core/parseWorkbook';
+import { loadWorkbook } from './helpers';
+
+// The standing input is RAG/운곡교P1입력.xlsx. The app serves a copy in public/samples; the two must stay identical.
+const RAG_INPUT = fileURLToPath(new URL('../../../RAG/운곡교P1입력.xlsx', import.meta.url));
+const APP_COPY = fileURLToPath(new URL('../public/samples/운곡교P1입력.xlsx', import.meta.url));
+
+describe('표준 입력 파일 (운곡교P1입력.xlsx)', () => {
+  it('the app sample is byte-identical to RAG/운곡교P1입력.xlsx', () => {
+    if (!existsSync(RAG_INPUT)) return; // RAG folder not present in this checkout
+    expect(readFileSync(APP_COPY).equals(readFileSync(RAG_INPUT))).toBe(true);
+  });
+
+  it('reads one pier, P1, T형, 말뚝기초, with 10 bearings', () => {
+    const { piers, issues } = parseWorkbook(loadWorkbook());
+    expect(issues).toEqual([]);
+    expect(piers.map((p) => p.name)).toEqual(['P1']);
+    expect(piers[0].type).toBe('T형');
+    expect(piers[0].foundationType).toBe('말뚝기초');
+    expect(piers[0].bearings).toHaveLength(10);
+  });
+});