feat(inputs): UX polish across input family + localFilter + focus scrollbar

Polish across the form input components, plus two new features and a few
standalone fixes.

Fixes
-----
* Reserve hint/error/success paragraph space (min-h-[1rem]) in 15
  components so a single error message no longer shifts neighboring grid
  cells: InputText, Email, Password, Phone, Amount, Number, Upload,
  Autocomplete, RichText, TextArea, Select, SelectCheckbox, Time,
  TimePicker, CalendarField, Checkbox.
* InputPhone: the '+' add button now follows the icon-state cascade
  (muted / primary on focus / black when filled / danger / success) like
  the other field icons instead of being permanently primary.
* Select and SelectCheckbox: chevron color follows the field state
  (muted by default, primary when open, black when an option is
  selected, danger / success on error / success) instead of always being
  text-current.
* InputTextArea: single-root component (was multi-root). The message
  wrapper used to occupy its own grid cell, breaking row-span layouts.
  Now flex flex-col, with the textarea area filling the available height
  via flex-1 and the message inside the same root.
* Disabled labels use text-m-muted (border-gray) instead of text-black/60
  (dark) across InputText, Email, Password, Amount, Phone, Upload,
  Autocomplete, TextArea, RichText. Also removes an unreachable
  peer-[&:not(:placeholder-shown):not(:focus)]:text-black/60 rule that
  twMerge was silently overriding with text-black.
* InputAutocomplete: eliminates four sources of visual jitter when
  focusing / opening a field that already has a selected value.
  - Drop peer-focus:-translate-y-[1.55rem] extra label translate.
  - Drop the .grow-height:focus padding rule (no more height growth or
    downward text shift on focus).
  - Drop focus:pl-[11px] (no more 1px horizontal jump).
  - Replace !border-b-0 with !border-b-transparent so the bottom border
    still reserves its 1px while remaining invisible against the
    dropdown.
* Select / SelectCheckbox: same anti-jitter treatment.
  - Drop .grow-height:focus padding rule (~12px height growth gone).
  - Replace !border-b-0 / !border-t-0 with !border-b-transparent /
    !border-t-transparent across danger / success / primary branches.
* Button: default width 240px -> 200px to match the form button sizing
  used across the app. Test updated to match.

Features
--------
* InputTextArea: scrollbar turns primary blue on focus
  (scrollbar-color: rgb(var(--m-primary)) transparent), matching the
  Select listbox styling.
* InputAutocomplete: new localFilter prop (default false). When enabled,
  filters the options prop client-side based on the input value
  (case-insensitive label.includes(query)), so static lists no longer
  need a @search listener. Async/API usage keeps the existing behavior.
  Playground "Simple statique" and "Avec icône à gauche" examples use
  local-filter.

Playground
----------
* client.vue: tighter grid gap (gap-y-5) plus an example error on a
  SelectCheckbox to visually exercise the message-space fix.

Tests
-----
All component test files include regression coverage for the above.
720/720 tests pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/components/malio/select/Select.vue

@@ -13,19 +13,19 @@
           hasError
             ? isOpen
               ? openDirection === 'down'
-                ? 'rounded-b-none !border !border-m-danger !border-b-0'
-                : 'rounded-t-none !border !border-m-danger !border-t-0'
+                ? 'rounded-b-none !border !border-m-danger !border-b-transparent'
+                : 'rounded-t-none !border !border-m-danger !border-t-transparent'
               : 'border-m-danger'
             : hasSuccess
               ? isOpen
                 ? openDirection === 'down'
-                  ? 'rounded-b-none !border !border-m-success !border-b-0'
-                  : 'rounded-t-none !border !border-m-success !border-t-0'
+                  ? 'rounded-b-none !border !border-m-success !border-b-transparent'
+                  : 'rounded-t-none !border !border-m-success !border-t-transparent'
                 : 'border-m-success'
               : isOpen
                 ? openDirection === 'down'
-                  ? 'rounded-b-none !border !border-m-primary !border-b-0'
-                  : 'rounded-t-none !border !border-m-primary !border-t-0'
+                  ? 'rounded-b-none !border !border-m-primary !border-b-transparent'
+                  : 'rounded-t-none !border !border-m-primary !border-t-transparent'
                 : isOptionSelected
                   ? 'border-black'
                   : 'border-m-muted',
@@ -73,13 +73,20 @@
       </span>
 
       <span
+        data-test="chevron"
         class="absolute right-3 top-1/2 -translate-y-1/2"
         :class="[
           hasError
             ? 'text-m-danger'
             : hasSuccess
               ? 'text-m-success'
-              : 'text-current'
+              : disabled
+                ? 'text-m-muted'
+                : isOpen
+                  ? 'text-m-primary'
+                  : isOptionSelected
+                    ? 'text-black'
+                    : 'text-m-muted'
         ]"
       >
       <slot name="icon">
@@ -145,7 +152,6 @@
     </ul>
     </div>
     <p
-      v-if="hint || hasError || hasSuccess"
       :id="`${buttonId}-describedby`"
       :class="[
         hasError
@@ -153,7 +159,7 @@
           : hasSuccess
             ? 'text-m-success'
             : 'text-m-muted',
-        'mt-1 ml-[2px] text-xs',
+        'mt-1 ml-[2px] text-xs min-h-[1rem]',
       ]"
     >
       {{ error || success || hint }}
@@ -330,12 +336,7 @@ onBeforeUnmount(() => document.removeEventListener('mousedown', onClickOutside))
 }
 
 .grow-height {
-  transition: border-color 160ms ease, box-shadow 160ms ease, padding-top 160ms ease, padding-bottom 160ms ease;
-}
-
-.grow-height:focus {
-  padding-top: 0.625rem;
-  padding-bottom: 0.625rem;
+  transition: border-color 160ms ease, box-shadow 160ms ease;
 }
 
 @media (prefers-reduced-motion: reduce) {