feat: v2.5.4 — Query Explorer folded into Sessions, Windows picker and paths

- Sessions page tabs: Sessions · Events · Agents. QueryExplorer.tsx became
  AgentsTable.tsx (agents only — sessions and events already had tabs);
  /query redirects to /sessions?view=agents and leaves the sidebar.
  GET /api/query is unchanged and still answers all three entities.
- Windows picker opens in front: -EncodedCommand script spends the hidden
  first ShowWindow that windowsHide gives the process, then brings the TopMost
  owner forward via AttachThreadInput (v2.5.3's owner was itself hidden).
- Session page Resume/Fork/Open pane: owningLane and sessionWorktreeName
  match Windows folders (either separator), with a test.

client/src/components/lanes/SessionResumeButton.tsx

@@ -26,15 +26,20 @@ import { ConfirmModal } from "../ConfirmModal";
 import { startInFreeTabDetailed } from "./startSession";
 import { liveRunFor, sessionWorktreeName } from "./WorkspaceSessionList";
 
+/** A path without its trailing separators — `/` or a Windows `\`. */
+const strip = (p: string) => p.replace(/[\\/]+$/, "");
+
 /** The workspace of this tool whose folder holds `cwd` most deeply — the
  *  same path-boundary rule the server binds hook sessions with. */
 export function owningLane(cwd: string, tool: string, lanes: Lane[]): Lane | null {
   let best: Lane | null = null;
+  const target = strip(cwd);
   for (const l of lanes) {
     if (l.tool !== tool) continue;
-    const root = l.cwd.replace(/\/+$/, "");
-    if (cwd !== root && !cwd.startsWith(root + "/")) continue;
-    if (!best || root.length > best.cwd.replace(/\/+$/, "").length) best = l;
+    const root = strip(l.cwd);
+    if (target !== root && !target.startsWith(root + "/") && !target.startsWith(root + "\\"))
+      continue;
+    if (!best || root.length > strip(best.cwd).length) best = l;
   }
   return best;
 }
@@ -74,7 +79,7 @@ export function SessionResumeButton({
         owningLane(session.cwd, tool, lanes));
   if (!lane || runs === null) return null;
   const run = liveRunFor(lane, runs, session.id);
-  const same = (a: string, b: string) => a.replace(/\/+$/, "") === b.replace(/\/+$/, "");
+  const same = (a: string, b: string) => strip(a) === strip(b);
   // Its own worktree counts too: the server resumes it there (`claude
   // --worktree` sessions), and refuses one whose worktree is gone.
   const resumable =