docs, comments: drop references to the removed model/effort picker

subagent.md no longer says the web UI's model picker offers
availableModels, and the comments in Dropdown, ComponentsPage and
WantedMenu no longer point at the deleted per-agent Picker.

frontend/packages/shared/src/dropdown/Dropdown.tsx

@@ -2,8 +2,7 @@
 // the `Badge` that opened it (../badge/Badge.tsx) so the control is
 // visually attached to the thing it affects, instead of living three
 // clicks away in a catch-all menu (the junk-drawer pattern
-// `docs/web-ui/design-guide.md` calls out by name against the old
-// per-agent terminal's model picker). Not a native `<dialog>` — a
+// `docs/web-ui/design-guide.md` calls out by name). Not a native `<dialog>` — a
 // `showModal()` dialog's backdrop would visually detach it from its
 // anchor badge, and a non-modal `show()` gets no click-outside-to-close
 // for free, so this hand-rolls the same "outside click or Escape

frontend/packages/swarm-ui/src/pages/ComponentsPage.tsx

@@ -167,8 +167,7 @@ function RefreshIntervalPickerSample() {
 }
 
 // The badge-triggers-a-dropdown-right-underneath-itself pattern this is
-// meant to land — the model/effort picker shape from the per-agent
-// terminal, demoed here with sample data. The wrapper
+// meant to land, demoed here with sample data. The wrapper
 // needs `position: relative` (`.components-badge-anchor`) so `Dropdown`
 // anchors under this badge specifically, not the page.
 function BadgePickerSample() {
@@ -528,7 +527,7 @@ export function ComponentsPage() {
           <Sample label="with a label prefix">
             <Badge label="ctx" value="534k" />
           </Sample>
-          <Sample label="interactive, opens a Dropdown (model/effort picker shape)">
+          <Sample label="interactive, opens a Dropdown">
             <BadgePickerSample />
           </Sample>
           <Sample label="interactive, toggles itself (pause/resume shape)">

frontend/packages/swarm-ui/src/pages/agents/WantedMenu.tsx

@@ -8,7 +8,7 @@
 // explicit — a dropdown just lets "up" be picked directly regardless
 // of what's inferred, no flip-to-the-opposite-of-a-guess involved
 // (mara: "when no state is declared, i want to set it to online").
-// Presentational only, same split as `StatusChips`'s `Picker`/
+// Presentational only, same split as `StatusChips`'s
 // `StatusMenu`: the caller owns what each selection actually does.
 //
 // "paused" has no separate resume option here — selecting "up" from a