chore(ai-review): 清空 findings

app/roles.js

@@ -2,6 +2,7 @@ import fs from 'fs';
 import path from 'path';
 import { fileURLToPath } from 'url';
 import yaml from 'js-yaml';
+import { warn } from './log.js';
 
 const ROLES_DIR = path.join(fileURLToPath(import.meta.url), '..', 'prompts', 'roles');
 
@@ -17,11 +18,24 @@ export function parseRoleFile(content) {
   return { ...meta, body: match[2].trim() };
 }
 
+let cachedRoles = null;
+
+/**
+ * 讀取並解析所有角色 .md，結果快取於模組層級（單次程序生命週期內檔案不變）。
+ * 單一檔案解析失敗（壞 YAML、缺 frontmatter 等）時記錄警告並略過，不讓整個流程崩潰。
+ */
 function readRoleFiles() {
-  return fs.readdirSync(ROLES_DIR)
-    .filter(f => f.endsWith('.md'))
-    .sort()
-    .map(f => parseRoleFile(fs.readFileSync(path.join(ROLES_DIR, f), 'utf8')));
+  if (cachedRoles) return cachedRoles;
+  const roles = [];
+  for (const f of fs.readdirSync(ROLES_DIR).filter(f => f.endsWith('.md')).sort()) {
+    try {
+      roles.push(parseRoleFile(fs.readFileSync(path.join(ROLES_DIR, f), 'utf8')));
+    } catch (e) {
+      warn(`角色檔解析失敗，已略過: ${f}（${e.message}）`);
+    }
+  }
+  cachedRoles = roles;
+  return cachedRoles;
 }
 
 /**
@@ -44,7 +58,7 @@ export function loadRole(name) {
  */
 export function buildAnalysisPrompt(role) {
   return [
-    `你是 ${role.badge ? role.badge + ' ' : ''}${role.name}，負責「${role.focus}」面向的程式碼審查（攻擊方）。`,
+    `你是 ${role.badge ? role.badge + ' ' : ''}${role.name}，負責「${role.focus || '綜合'}」面向的程式碼審查（攻擊方）。`,
     role.personality ? `個性：${role.personality}` : '',
     '',
     role.body,
@@ -77,7 +91,7 @@ export function getRoleIntro(roles) {
   ];
   for (const r of roles) {
     const badge = r.badge ? `${r.badge} ` : '';
-    lines.push(`| **${badge}${r.name}** | ${r.focus} | ${r.personality} |`);
+    lines.push(`| **${badge}${r.name}** | ${r.focus || ''} | ${r.personality || ''} |`);
   }
   return lines.join('\n');
 }

app/roles.test.js

@@ -72,6 +72,11 @@ describe('buildAnalysisPrompt', () => {
     assert.match(prompt, /審查重點：邊界與空值/);
     assert.match(prompt, /只回傳 JSON 陣列/);
   });
+
+  it('falls back to a default when focus is missing instead of showing undefined', () => {
+    const prompt = buildAnalysisPrompt({ name: 'NoFocus', body: 'x' });
+    assert.doesNotMatch(prompt, /undefined/);
+  });
 });
 
 describe('getRoleIntro', () => {
@@ -80,4 +85,10 @@ describe('getRoleIntro', () => {
     assert.match(intro, /🔮 Tester/);
     assert.match(intro, /logic/);
   });
+
+  it('renders empty cells instead of undefined when focus/personality are missing', () => {
+    const intro = getRoleIntro([{ name: 'Bare' }]);
+    assert.match(intro, /Bare/);
+    assert.doesNotMatch(intro, /undefined/);
+  });
 });