feat(sidebar): worktree indicator on session rows

apps/web/src/components/Sidebar.tsx

@@ -17,6 +17,7 @@ import {
   resolveThreadPr,
   terminalStatusFromRunningIds,
   ThreadStatusLabel,
+  ThreadWorktreeIndicator,
 } from "./ThreadStatusIndicators";
 import { ProjectFavicon } from "./ProjectFavicon";
 import { useAtomValue } from "@effect/atom-react";
@@ -741,6 +742,7 @@ export const SidebarThreadRow = memo(function SidebarThreadRow(props: SidebarThr
               </TooltipPopup>
             </Tooltip>
           )}
+          <ThreadWorktreeIndicator thread={thread} />
           {terminalStatus && (
             <Tooltip>
               <TooltipTrigger

apps/web/src/components/ThreadStatusIndicators.test.tsx

@@ -0,0 +1,39 @@
+import { ThreadId } from "@t3tools/contracts";
+import { renderToStaticMarkup } from "react-dom/server";
+import { describe, expect, it } from "vite-plus/test";
+
+import { ThreadWorktreeIndicator } from "./ThreadStatusIndicators";
+
+describe("ThreadWorktreeIndicator", () => {
+  it("renders the worktree folder and branch in an accessible label", () => {
+    const markup = renderToStaticMarkup(
+      <ThreadWorktreeIndicator
+        thread={{
+          id: ThreadId.make("thread-1"),
+          branch: "feature/sidebar-indicator",
+          worktreePath: "/tmp/worktrees/sidebar-indicator",
+        }}
+      />,
+    );
+
+    expect(markup).toContain('role="img"');
+    expect(markup).toContain(
+      'aria-label="Worktree: sidebar-indicator (feature/sidebar-indicator)"',
+    );
+    expect(markup).toContain('data-testid="thread-worktree-thread-1"');
+  });
+
+  it.each([null, "", "   "])("renders nothing for an absent worktree path", (worktreePath) => {
+    const markup = renderToStaticMarkup(
+      <ThreadWorktreeIndicator
+        thread={{
+          id: ThreadId.make("thread-1"),
+          branch: "main",
+          worktreePath,
+        }}
+      />,
+    );
+
+    expect(markup).toBe("");
+  });
+});

apps/web/src/components/ThreadStatusIndicators.tsx

@@ -4,7 +4,7 @@ import {
   scopeThreadRef,
 } from "@t3tools/client-runtime/environment";
 import type { VcsStatusResult } from "@t3tools/contracts";
-import { CloudIcon, GitPullRequestIcon, TerminalIcon } from "lucide-react";
+import { CloudIcon, FolderGit2Icon, GitPullRequestIcon, TerminalIcon } from "lucide-react";
 import { useMemo } from "react";
 import { useEnvironment, usePrimaryEnvironmentId } from "../state/environments";
 import { useProject } from "../state/entities";
@@ -15,6 +15,7 @@ import { useUiStateStore } from "../uiStateStore";
 import { resolveChangeRequestPresentation } from "../sourceControlPresentation";
 import { resolveThreadStatusPill, type ThreadStatusPill } from "./Sidebar.logic";
 import type { SidebarThreadSummary } from "../types";
+import { formatWorktreePathForDisplay } from "../worktreeCleanup";
 import { Tooltip, TooltipPopup, TooltipTrigger } from "./ui/tooltip";
 
 export interface PrStatusIndicator {
@@ -94,6 +95,40 @@ export function terminalStatusFromRunningIds(
   };
 }
 
+export function ThreadWorktreeIndicator({
+  thread,
+}: {
+  thread: Pick<SidebarThreadSummary, "id" | "branch" | "worktreePath">;
+}) {
+  const worktreePath = thread.worktreePath?.trim();
+  if (!worktreePath) {
+    return null;
+  }
+
+  const displayPath = formatWorktreePathForDisplay(worktreePath);
+  const tooltip = thread.branch
+    ? `Worktree: ${displayPath} (${thread.branch})`
+    : `Worktree: ${displayPath}`;
+
+  return (
+    <Tooltip>
+      <TooltipTrigger
+        render={
+          <span
+            role="img"
+            aria-label={tooltip}
+            data-testid={`thread-worktree-${thread.id}`}
+            className="inline-flex items-center justify-center"
+          />
+        }
+      >
+        <FolderGit2Icon className="size-3 text-muted-foreground/40" />
+      </TooltipTrigger>
+      <TooltipPopup side="top">{tooltip}</TooltipPopup>
+    </Tooltip>
+  );
+}
+
 export function ThreadStatusLabel({
   status,
   compact = false,