Add qs.Ui.Dropdown, SearchableDropdown, Toggle rounded variant

default/quickshell/omarchy-shell/Ui/README.md

@@ -56,8 +56,10 @@ Grouped by what they're for, not alphabetically.
 | `PillButton` | Rounded button with optional icon + label + tooltip. Has `active`, `hasCursor` (keyboard cursor), `focusable` (Tab-focus with accent ring), `bordered` (persistent 1px idle border for primary form buttons), and `enabled`. Hover and keyboard cursor render identically (fill + border) via the shared `hot` state; Tab-focus uses an accent ring that wins over both. |
 | `CursorPill` | `PillButton` that participates in a panel's single-cursor model. Adds a `hovered(bool)` signal so the panel can update its cursor state on mouse enter/leave. Use for DNS-pill / header-pill / segmented-choice patterns. |
 | `ChoiceButton` | A single button in a mutually-exclusive choice group (segmented control). `selected` uses accent fill+border; focus uses `Style.focusBorderColor` so keyboard nav reads differently from selection. |
-| `Toggle` | Title + description + switch. Click anywhere on the row to flip; caller updates `checked` in response. |
+| `Toggle` | Title + description + switch. Click anywhere on the row to flip; caller updates `checked` in response. `rounded` auto-detects from `Style.cornerRadius` so the switch is a pill on round-corners themes and square on sharp; override per-instance to force one or the other. |
 | `TextField` | Single-line input. Inherits from Qt Quick Controls `TextField` so all of its base API (text, placeholderText, accepted, validator, ...) is available. Adds `password: bool`, `foreground` / `accent` / `selectionTint` color overrides, and `horizontalPadding` / `verticalPadding` size knobs. Focus styling uses `Style.focusBorderColor` to match `Toggle` and `ChoiceButton`. |
+| `Dropdown` | Single-select dropdown with a themed popup (no platform-native ComboBox chrome). `options` accepts `string[]` or `[{ value, label }]`. Keyboard: Tab to focus trigger, Enter/Space opens, j/k or arrows walk options, Enter selects. |
+| `SearchableDropdown` | `Dropdown` with an embedded search field at the top of the popup that filters options as you type. Use when the option count is high enough that scanning is friction (e.g. bar settings "+ Add widget"). Options can also carry a `description` string that the filter matches against. |
 | `PanelActionButton` | 22×22 right-edge action button (confirm, forget, unpair). `hoverColor` swaps between default foreground tint and urgent (red) tint. `focusable: true` enables Tab-focus with an accent ring — used for the bar settings widget-card row controls. |
 | `PanelSlider` | Volume/progress slider. Drag, click track, or wheel. `moved(value)` fires per change, `released(value)` once at end. (Named to avoid colliding with `QtQuick.Controls.Slider`.) |
 | `WidgetButton` | Bar widget chrome — for the strip itself, not for inside panels. |