fix(attribution): hide unattributed chip when a task has no responsible member (MUL-4765)

The Human Attribution work (MUL-4302) showed a yellow "No responsible member"
warning chip in the execution log and working-status surfaces whenever a task
had no resolved responsible member. An unassigned run is a normal state, not
something to flag, so the badge variant now renders nothing in that case —
matching the avatar variant, which already stayed silent. Removes the now-dead
`unattributed` locale string across all bundles.

Co-authored-by: multica-agent <github@multica.ai>

packages/views/issues/components/attribution-badge.test.tsx

@@ -62,7 +62,7 @@ describe("AttributionBadge", () => {
     expect(screen.getByText("on behalf of someone")).toBeInTheDocument();
   });
 
-  it("renders an unattributed chip when no responsible member resolved", () => {
+  it("renders nothing when no responsible member resolved (MUL-4765)", () => {
     const attribution: TaskAttribution = {
       source: "unattributed",
       precise: false,
@@ -71,8 +71,9 @@ describe("AttributionBadge", () => {
       <AttributionBadge attribution={attribution} />,
     );
 
-    expect(screen.getByText("No responsible member")).toBeInTheDocument();
-    expect(container.querySelector(".text-warning")).not.toBeNull();
+    // An unassigned run is a normal state, not a warning — the badge stays silent
+    // rather than showing a "No responsible member" chip.
+    expect(container).toBeEmptyDOMElement();
   });
 
   it("degrades gracefully for an unknown source label", () => {

packages/views/issues/components/attribution-badge.tsx

@@ -26,9 +26,10 @@ function initialsOf(name: string): string {
  * the "on behalf of <member>" provenance, with the resolution source and a
  * distinct warning tone for degraded (non-precise) attribution.
  *
- * Two shapes:
- *  - `variant="badge"` (default): the full "on behalf of <name>" chip, with an
- *    explicit "unattributed" chip when no responsible member resolved.
+ * Two shapes, both silent when no responsible member resolved (MUL-4765):
+ *  - `variant="badge"` (default): the full "on behalf of <name>" chip. Renders
+ *    nothing when there's no accountable member, so an unassigned run reads as
+ *    plain rather than a warning.
  *  - `variant="avatar"`: just the accountable member's avatar, with the name +
  *    source in a hover tooltip. Compact enough for a dense task row. Renders
  *    nothing when there's no accountable member — an avatar-only surface has
@@ -132,19 +133,11 @@ export function AttributionBadge({
     );
   }
 
-  if (!initiator) {
-    return (
-      <Badge
-        variant="outline"
-        className={cn("max-w-40 min-w-0 gap-1 font-normal text-warning", className)}
-        title={sourceLabel}
-      >
-        <span className="min-w-0 truncate">
-          {t(($) => $.execution_log.attribution.unattributed)}
-        </span>
-      </Badge>
-    );
-  }
+  // No resolved responsible member: render nothing rather than a warning chip.
+  // An empty accountable member is a normal state (e.g. an unassigned task), not
+  // something to flag — so the badge variant stays silent, matching the avatar
+  // variant above (MUL-4765).
+  if (!initiator) return null;
 
   const name = initiator.name || t(($) => $.execution_log.attribution.someone);
   return (

packages/views/locales/en/issues.json

@@ -407,7 +407,6 @@
     "attribution": {
       "on_behalf_of": "on behalf of {{name}}",
       "someone": "someone",
-      "unattributed": "No responsible member",
       "source_direct_human": "Direct member action",
       "source_delegation": "Delegated from another run",
       "source_comment_source": "From a comment thread",

packages/views/locales/ja/issues.json

@@ -389,7 +389,6 @@
     "attribution": {
       "on_behalf_of": "{{name}} の代理として",
       "someone": "あるメンバー",
-      "unattributed": "責任メンバーなし",
       "source_direct_human": "メンバーの直接操作",
       "source_delegation": "別の実行から委任",
       "source_comment_source": "コメントスレッドから",

packages/views/locales/ko/issues.json

@@ -389,7 +389,6 @@
     "attribution": {
       "on_behalf_of": "{{name}} 님을 대신하여",
       "someone": "어떤 멤버",
-      "unattributed": "책임 멤버 없음",
       "source_direct_human": "멤버 직접 작업",
       "source_delegation": "다른 실행에서 위임됨",
       "source_comment_source": "댓글 스레드에서",

packages/views/locales/zh-Hans/issues.json

@@ -389,7 +389,6 @@
     "attribution": {
       "on_behalf_of": "代表 {{name}}",
       "someone": "某位成员",
-      "unattributed": "无责任成员",
       "source_direct_human": "成员直接操作",
       "source_delegation": "由其他运行委托",
       "source_comment_source": "来自评论线程",