feat(reativa): implement every remaining example — full parity with Xote

.changeset/reativa-components-batch-three.md

@@ -0,0 +1,20 @@
+---
+"@prescriptive/reativa": minor
+---
+
+Add the final batch of reativa example implementations, reaching **full parity**
+with the Xote examples — every spec that has a Xote demo now has a matching
+**Reativa** preview, mirroring `website/src/Examples.res`.
+
+- **components**: `form`, `resizable`, `search`, `comment`
+- **pages**: `dashboard`, `landing-page`, `pricing`, `settings`, `sign-in`
+- **flows**: `authentication`, `checkout`, `onboarding`
+
+`search` filters a list live with `View.for_`; `resizable` binds a range input
+to a reactive `style` on both panels; `form` submits with `View.On.submit` +
+`prevent_default` and reveals a success message via `View.show`; `sign-in` wires
+a native checkbox through a reactive `checked` binding; the `authentication` and
+`onboarding` flows step through their states from a single `step` signal.
+Registered in `Registry.mlx`'s `example_for` / `example_ids`. reativa now covers
+26 elements, 42 components, 13 blocks, 5 pages, and 3 flows — the same set Xote
+implements.

.changeset/reativa-components-batch-two.md

@@ -0,0 +1,23 @@
+---
+"@prescriptive/reativa": minor
+---
+
+Add the second batch of 20 more `@prescriptive/reativa` example implementations —
+the overlay, data, picker, and navigation components — so each spec gets a
+**Reativa** preview alongside the Xote one, matching the demos in
+`website/src/Examples.res`.
+
+- **overlays & menus**: `alert-dialog`, `dropdown-menu`, `context-menu`,
+  `popover`, `hover-card`, `sheet`, `drawer`, `toast`
+- **data & pickers**: `table`, `data-table`, `chart`, `carousel`, `combobox`,
+  `command`, `calendar`, `date-picker`
+- **navigation**: `navbar`, `menubar`, `navigation-menu`, `sidebar`
+
+These lean on `Reativa.View`'s reactive primitives: `View.show` for the
+open/closed overlays (dismissed via the existing `Backdrop`), `View.for_` for
+the live-filtered lists (`combobox`, `command`, `data-table`), `class_reactive`
+for the selected-day / active-dot state (`calendar`, `date-picker`, `carousel`),
+and a reactive `style` for the carousel track. `context-menu` and `hover-card`
+use `View.On.on` for the `contextmenu` / `mouseenter` / `mouseleave` events.
+Registered in `Registry.mlx`'s `example_for` / `example_ids`. This brings
+reativa to 26 elements, 38 components, and 13 blocks.

packages/reativa/README.md

@@ -13,13 +13,16 @@ reactive regions (driven by signals) update in place.
 
 ## What's implemented
 
-26 elements, 18 components, and 13 blocks:
+The full set `@prescriptive/xote` covers — 26 elements, 42 components, 13 blocks,
+5 pages, and 3 flows:
 
 | Layer | Specs |
 | ----- | ----- |
 | element | `aspect-ratio` `avatar` `badge` `button` `checkbox` `icon` `icon-button` `input` `input-otp` `kbd` `label` `legend` `link` `logo` `progress` `radio-group` `scroll-area` `separator` `skeleton` `slider` `spinner` `switch` `textarea` `toggle` `toggle-group` `typography` |
-| component | `accordion` `alert` `breadcrumb` `button-group` `card` `collapsible` `dialog` `empty-state` `field` `footer` `input-group` `list` `pagination` `select` `stat` `tabs` `toolbar` `tooltip` |
+| component | `accordion` `alert` `alert-dialog` `breadcrumb` `button-group` `calendar` `card` `carousel` `chart` `collapsible` `combobox` `command` `comment` `context-menu` `data-table` `date-picker` `dialog` `drawer` `dropdown-menu` `empty-state` `field` `footer` `form` `hover-card` `input-group` `list` `menubar` `navbar` `navigation-menu` `pagination` `popover` `resizable` `search` `select` `sheet` `sidebar` `stat` `table` `tabs` `toast` `toolbar` `tooltip` |
 | block | `announcement-bar` `contact-section` `cta-section` `faq` `feature-grid` `hero` `logo-cloud` `newsletter` `page-header` `pricing-table` `stat-grid` `steps` `testimonial` |
+| page | `dashboard` `landing-page` `pricing` `settings` `sign-in` |
+| flow | `authentication` `checkout` `onboarding` |
 
 Each component is a plain function — `Button.make ~variant:\`primary ~children ()`
 — and composes the others. Enum prop types (`variant`, `size`, …) are generated