Add the M3 Expressive slider

Standard, centered and range sliders on native range inputs, drawn as
Compose draws them, in five sizes with ticks, value labels and inset
icons. Completes Phase 6.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy

docs/plans/livewire-material.md

@@ -459,6 +459,34 @@ tokens, `training-row`, `map-shell`, `map-chip`, `product-shot`, `star-rating`,
     inputs, value label), `search` (search bar and search view, results through a Livewire
     property).
 
+**Phase 6 is done (2026-09-13).** What changed from the steps above:
+
+- **The field family is ReStride's, extended with M3's filled text field** (`variant`, default from
+  `config('livewire-material.fields.variant')`): a surface-container-highest box, extra-small top
+  corners, the outline turned into an indicator line and the label floating inside. A textarea's
+  top offset is half margin, so text scrolled up in a full textarea disappears under the edge
+  instead of running through the label; it grows with `field-sizing: content` from `rows` to
+  `max-rows`, with a script fallback (`field.js`) that no current engine needs.
+- **Checkbox, radio and switch are CSS on native inputs** (`components/selection.css`), hooked by
+  `data-checkbox`, `data-radio`, `data-switch`: `checkbox`, `radio` and `toggle` are daisyUI class
+  names the design guard rejects. The indeterminate checkbox is `data-indeterminate`, kept in step
+  with the property by a MutationObserver, since HTML has no attribute for it.
+- **`<x-chip>` and `<x-slider>` were built by separate agents in their own worktrees.** Chips: one
+  component for four types; a filter chip is a native checkbox when bound and a toggle button
+  otherwise; removable input chips hand focus on by `wire:key` after a morph. Slider: native range
+  inputs under a drawing ported from Compose (`wire:ignore`); `.number` is added to the binding,
+  because a string sent and an integer returned made Livewire move the handle back mid-drag.
+- **`<x-choices>` keeps typed values in Alpine** (filter chips as toggle buttons, or a searchable
+  combobox whose list is a `popover="manual"` placed by CSS anchor positioning, so a card's
+  `overflow-hidden` never clips it). Selecting the text on focus has to happen on the `click` that
+  follows the press: Chromium collapses a selection made in the focus handler.
+- **`<x-search>` is the search bar and view**: docked from `sm`, full screen and trapped below it.
+  It closes on `pointerdown` outside, not `click` (the bar moves under the pointer as it goes full
+  screen, and the click then lands outside), and focus returned to the input within 250ms of a close
+  does not reopen it (Escape, and the trap letting go).
+- **A slot rendered by a `@foreach` with no items is not empty** to `isNotEmpty()`; use
+  `hasActualContent()`.
+
 ### Phase 7 — Pickers
 
 27. `datepicker` (docked, modal, modal input; `Intl` month/day names and week start from the