fix: distinguish unassessed job scores

BUGFIX_LOG.md

@@ -9,6 +9,20 @@
 ---
 ## 2026-08-11
 
+### BUG · 未评分职位卡被错误显示为 0 分
+
+**错误**
+切换 CV 后，大量没有当前 CV 精评分的缓存职位在列表中显示为 0 分，看起来像是模型给出了最低匹配结果。
+
+**原因**
+后端正确返回 `score: null`，但前端评分徽章先执行 `Number(null)`；JavaScript 会将其转换为数值 `0`，导致“未评分”和“真实 0 分”无法区分。
+
+**解决方案**
+评分徽章在数值转换前显式识别 `null` 和 `undefined`，未评分显示灰色长横线，真实数值 0 继续显示为 0。
+
+**结果**
+新增前端回归测试覆盖未评分与真实 0 分的区分；前端语法检查、Ruff、Python 编译和完整 pytest（248 tests）均通过。
+
 ### BUG · 已删除 Gmail 邮件导致增量同步游标永久停滞
 
 **错误**

CHANGELOG.md

@@ -4,6 +4,9 @@
 
 ### Bug Fixes
 
+- **Unassessed job cards no longer appear as zero-score matches** (`templates/index.html`)
+  Job cards whose current-CV score is `null` now show a gray em dash instead of being coerced to `0` by JavaScript. Genuine numeric zero scores still display as zero, preserving the distinction between "not assessed" and "assessed with no match".
+
 - **Deleted Gmail messages no longer stall incremental sync** (`email_sync.py`)
   When Gmail history references a message that has already disappeared, a `messages.get` 404 is now treated as a terminal missing-message condition rather than a retryable fetch failure. The sync skips that message and saves Gmail's latest `historyId`, while authentication, rate-limit, server, and network errors still hold the cursor for a later retry.
 

jobradar/templates/index.html

@@ -2095,8 +2095,9 @@ <h4 class="text-sm font-bold uppercase tracking-wide text-gray-500 dark:text-gra
   return "bg-red-400";
 }
 function scoreBadge(s) {
-  const numeric = Number(s);
-  const display = Number.isFinite(numeric) ? Math.round(numeric) : "?";
+  const missing = s === null || s === undefined;
+  const numeric = missing ? NaN : Number(s);
+  const display = missing ? "—" : Number.isFinite(numeric) ? Math.round(numeric) : "?";
   return `<span class="inline-flex items-center justify-center w-11 h-11 rounded-full text-white text-sm font-bold font-mono leading-none tabular-nums flex-shrink-0 ${scoreColor(s)}">${display}</span>`;
 }
 function normalizedScore(s) {

tests/test_search_control.py

@@ -94,3 +94,16 @@ def test_start_search_keeps_existing_jobs_until_sse_updates_them():
     assert "JOBS = []" not in start_search
     assert "activeKey = null" not in start_search
     assert "if (existing >= 0) JOBS[existing] = job;" in html
+
+
+def test_score_badge_distinguishes_unassessed_from_real_zero():
+    html = (Path(__file__).parents[1] / "jobradar" / "templates" / "index.html").read_text(
+        encoding="utf-8"
+    )
+    score_badge = html.split("function scoreBadge(s)", 1)[1].split(
+        "function normalizedScore", 1
+    )[0]
+
+    assert 'const missing = s === null || s === undefined;' in score_badge
+    assert 'const display = missing ? "—"' in score_badge
+    assert 'Number.isFinite(numeric) ? Math.round(numeric) : "?"' in score_badge