diff --git a/frontend/packages/shared/src/dropdown/Dropdown.tsx b/frontend/packages/shared/src/dropdown/Dropdown.tsx
index 039fd9cd..8593fd46 100644
--- a/frontend/packages/shared/src/dropdown/Dropdown.tsx
+++ b/frontend/packages/shared/src/dropdown/Dropdown.tsx
@@ -8,23 +8,15 @@
 // for free, so this hand-rolls the same "outside click or Escape
 // closes" contract `Dialog` gets from the platform.
 //
-// Positioning is the caller's job by default: render `<Dropdown>` as a
-// child of a `position: relative` wrapper (the badge + dropdown pair)
-// and it anchors to that box's bottom-left via CSS — no portal, no
-// re-parenting to `<body>` to reason about. That's wrong the moment the
-// wrapper sits inside a scrolling container, though: an ancestor with
-// `overflow-x: auto` computes `overflow-y` to `auto` too (per the CSS
-// overflow spec), so it clips the dropdown vertically the instant the
-// container is shorter than header-plus-dropdown — reported against
-// swarm-ui's agent table (a `WantedMenu` badge two rows from the
-// bottom). `../../ui/table/Table.tsx` hit the identical clip for its
-// own column-filter popover and fixed it with `position: fixed`
-// computed from the anchor's `getBoundingClientRect()`, rendered via a
-// portal outside the scrolling subtree; the optional `portal` prop
-// below opts a caller into that same recipe instead of a second
-// hand-rolled copy of it.
-import { useEffect, useRef, useState } from "preact/hooks";
-import { createPortal } from "preact/compat";
+// Positioning is the caller's job: render `<Dropdown>` as a child of a
+// `position: relative` wrapper (the badge + dropdown pair) and it anchors to
+// that box's bottom-left via CSS. Put the wrapper outside any scrolling
+// container: an ancestor with `overflow-x: auto` computes `overflow-y` to `auto`
+// too (per the CSS overflow spec), so it clips the dropdown vertically. A
+// `position: fixed` list rendered through a portal escapes that, as
+// `../../ui/table/Table.tsx` does for its column filters; this component had
+// that mode for the agents table, and dropped it with the table.
+import { useEffect, useRef } from "preact/hooks";
 import type { ComponentChildren, RefObject } from "preact";
 import "./Dropdown.css";
 
@@ -61,13 +53,6 @@ export interface DropdownProps {
    * one ref) already avoids this.
    */
   anchorRef?: RefObject<HTMLElement>;
-  /**
-   * Escape a clipping scroll ancestor by portal-rendering to `<body>`
-   * with `position: fixed`, computed from `anchorRef`'s rect — see the
-   * file-top comment. Requires `anchorRef`; a caller in an unscrolled,
-   * un-clipped context (the common case) can omit this entirely.
-   */
-  portal?: boolean;
 }
 
 export function Dropdown({
@@ -78,14 +63,8 @@ export function Dropdown({
   onClose,
   label,
   anchorRef,
-  portal,
 }: DropdownProps) {
   const ref = useRef<HTMLDivElement>(null);
-  // Only populated (and only consulted) in `portal` mode — see the
-  // effect below and the file-top comment for why fixed-position
-  // coordinates are needed at all here.
-  const [pos, setPos] = useState<{ top: number; left: number } | null>(null);
-
   useEffect(() => {
     if (!open) return;
     function handlePointerDown(e: PointerEvent) {
@@ -108,35 +87,10 @@ export function Dropdown({
     };
   }, [open, onClose]);
 
-  // Same recipe as `Table.tsx`'s column-filter popover: compute once on
-  // open, then keep it pinned to the anchor across any scroll in the
-  // tree (`capture: true` sees a nested scroll container too, since
-  // plain `scroll` doesn't bubble) or a viewport resize.
-  useEffect(() => {
-    if (!open || !portal) return;
-    function recompute() {
-      const rect = anchorRef?.current?.getBoundingClientRect();
-      if (rect) setPos({ top: rect.bottom + 4, left: rect.left });
-    }
-    recompute();
-    window.addEventListener("scroll", recompute, true);
-    window.addEventListener("resize", recompute);
-    return () => {
-      window.removeEventListener("scroll", recompute, true);
-      window.removeEventListener("resize", recompute);
-    };
-  }, [open, portal, anchorRef]);
-
   if (!open) return null;
 
-  const list = (
-    <div
-      class="ui-dropdown"
-      role="menu"
-      aria-label={label}
-      ref={ref}
-      style={portal && pos ? { position: "fixed", ...pos } : undefined}
-    >
+  return (
+    <div class="ui-dropdown" role="menu" aria-label={label} ref={ref}>
       {options.map((opt) => (
         <button
           type="button"
@@ -158,10 +112,4 @@ export function Dropdown({
       ))}
     </div>
   );
-
-  // Not yet positioned (first render after opening, before the effect
-  // above runs) — skip the portal render entirely rather than flashing
-  // the list at `document.body`'s origin for one frame.
-  if (portal) return pos ? createPortal(list, document.body) : null;
-  return list;
 }