feat(ui) : état readonly visuel sur les inputs floating-label

Applique le traitement readonly canonique (isReadonly, shouldFloatLabel,
mergedInputClass sans grow-height, bordure noire fixe, sans focus:border-m-primary,
mergedLabelClass sans peer-focus, iconStateClass sans isFocused) sur les 6 composants
InputText, InputEmail, InputAmount, InputAutocomplete, InputPassword et InputTextArea.
L'œil de InputPassword reste cliquable en readonly. Tests TDD ajoutés (3 cas par fichier).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/components/malio/input/InputAutocomplete.vue

@@ -249,7 +249,12 @@ const hasSelection = computed(() =>
 const hasError = computed(() => !!props.error)
 const hasSuccess = computed(() => !!props.success && !hasError.value)
 const isFilled = computed(() => inputValue.value.trim().length > 0 || hasSelection.value)
-const shouldFloatLabel = computed(() => isFocused.value || inputValue.value.length > 0)
+const isReadonly = computed(() => props.readonly && !props.disabled)
+const shouldFloatLabel = computed(() =>
+  isReadonly.value
+    ? isFilled.value
+    : isFocused.value || inputValue.value.length > 0,
+)
 
 const showMinSearch = computed(() =>
   props.minSearchLength > 0 && inputValue.value.length < props.minSearchLength,
@@ -311,8 +316,11 @@ const labelPositionClass = computed(() =>
 
 const mergedInputClass = computed(() =>
   twMerge(
-    'floating-input grow-height peer min-h-[40px] w-full border bg-white pl-3 pr-3 py-1 outline-none placeholder:text-transparent text-lg rounded-md',
-    isFilled.value ? 'border-black' : 'border-m-muted',
+    'floating-input peer min-h-[40px] w-full border bg-white pl-3 pr-3 py-1 outline-none placeholder:text-transparent text-lg rounded-md',
+    isReadonly.value ? '' : 'grow-height',
+    isReadonly.value
+      ? 'border-black'
+      : isFilled.value ? 'border-black' : 'border-m-muted',
     props.disabled
       ? 'cursor-not-allowed text-black/60 [&:not(:placeholder-shown)]:border-m-muted border-m-muted'
       : 'cursor-text',
@@ -320,7 +328,8 @@ const mergedInputClass = computed(() =>
       ? 'border-m-danger focus:border-m-danger [&:not(:placeholder-shown)]:border-m-danger'
       : hasSuccess.value
         ? 'border-m-success focus:border-m-success [&:not(:placeholder-shown)]:border-m-success'
-        : 'focus:border-m-primary',
+        : isReadonly.value ? '' : 'focus:border-m-primary',
+    isReadonly.value ? 'cursor-default' : '',
     isOpen.value ? '!rounded-b-none !border-b-transparent' : '',
     props.inputClass,
     iconInputPaddingClass.value,
@@ -338,7 +347,9 @@ const mergedLabelClass = computed(() =>
         ? 'text-m-success'
         : props.disabled
           ? 'text-m-muted'
-          : 'peer-placeholder-shown:text-m-muted peer-[&:not(:placeholder-shown):not(:focus)]:text-black peer-focus:text-m-primary',
+          : isReadonly.value
+            ? isFilled.value ? 'text-black' : 'text-m-muted'
+            : 'peer-placeholder-shown:text-m-muted peer-[&:not(:placeholder-shown):not(:focus)]:text-black peer-focus:text-m-primary',
     props.labelClass,
   ),
 )
@@ -347,6 +358,7 @@ const iconStateClass = computed(() => {
   if (hasError.value) return 'text-m-danger'
   if (hasSuccess.value) return 'text-m-success'
   if (props.disabled) return props.iconColor
+  if (isReadonly.value) return isFilled.value ? 'text-black' : 'text-m-muted'
   if (isFocused.value) return 'text-m-primary'
   if (isFilled.value) return 'text-black'
   return props.iconColor
@@ -355,6 +367,7 @@ const iconStateClass = computed(() => {
 const chevronColorClass = computed(() => {
   if (hasError.value) return 'text-m-danger'
   if (hasSuccess.value) return 'text-m-success'
+  if (isReadonly.value) return isFilled.value ? 'text-black' : 'text-m-muted'
   if (isOpen.value) return 'text-m-primary'
   if (isFilled.value) return 'text-black'
   return 'text-m-muted'