UI: Identity component, LiveRunWidget, issue identifiers, and UX improvements

Add Identity component (avatar + name) used across agent/issue displays. Add
LiveRunWidget for real-time streaming of active heartbeat runs on issue detail
pages via WebSocket. Display issue identifiers (PAP-42) instead of UUID
fragments throughout Issues, Inbox, CommandPalette, and detail pages.
Enhance CommentThread with re-open checkbox, Cmd+Enter submit, sorted display,
and run linking. Improve Activity page with richer formatting and filtering.
Update Dashboard with live metrics. Add reports-to agent link in AgentProperties.
Various small fixes: StatusIcon centering, CopyText ref init, agent detail
run-issue cross-links.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/components/IssueProperties.tsx

@@ -7,6 +7,7 @@ import { useCompany } from "../context/CompanyContext";
 import { queryKeys } from "../lib/queryKeys";
 import { StatusIcon } from "./StatusIcon";
 import { PriorityIcon } from "./PriorityIcon";
+import { Identity } from "./Identity";
 import { formatDate } from "../lib/utils";
 import { timeAgo } from "../lib/timeAgo";
 import { Separator } from "@/components/ui/separator";
@@ -87,9 +88,9 @@ export function IssueProperties({ issue, onUpdate }: IssuePropertiesProps) {
           {assignee ? (
             <Link
               to={`/agents/${assignee.id}`}
-              className="text-sm hover:underline"
+              className="hover:underline"
             >
-              {assignee.name}
+              <Identity name={assignee.name} size="sm" />
             </Link>
           ) : (
             <span className="text-sm text-muted-foreground">Unassigned</span>