refactor(machines) : remove TypeMachine skeleton system, simplify machine creation

- Remove TypeEdit*, TypeInfoDisplay, MachineSkeletonSummary, MachineCreatePreview components
- Remove machine-skeleton pages and type pages
- Remove useMachineTypesApi, useMachineSkeletonEditor, useMachineCreateSelections composables
- Add AddEntityToMachineModal for direct entity linking
- Update machine detail/create pages for direct custom fields
- Fix SearchSelect, category display, and ipartial search filters

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/components/common/SearchSelect.vue

@@ -18,6 +18,15 @@
         @keydown.enter.prevent="selectHighlighted"
         @input="handleInput"
       >
+      <button
+        v-if="clearable && modelValue"
+        type="button"
+        class="absolute top-1/2 -translate-y-1/2 right-8 btn btn-ghost btn-xs"
+        aria-label="Effacer la sélection"
+        @click.stop="clearSelection"
+      >
+        <IconLucideX class="w-3 h-3" aria-hidden="true" />
+      </button>
       <button
         type="button"
         :class="toggleButtonClasses"
@@ -77,6 +86,7 @@
 <script setup>
 import { ref, computed, watch, onMounted, onBeforeUnmount } from 'vue'
 import IconLucideChevronsUpDown from '~icons/lucide/chevrons-up-down'
+import IconLucideX from '~icons/lucide/x'
 
 const props = defineProps({
   modelValue: {
@@ -111,6 +121,10 @@ const props = defineProps({
     type: [String, Function],
     default: null
   },
+  clearable: {
+    type: Boolean,
+    default: false
+  },
   size: {
     type: String,
     default: 'md',
@@ -155,7 +169,8 @@ const displayedOptions = computed(() => {
 })
 
 const inputClasses = computed(() => {
-  const base = ['input', 'input-bordered', 'w-full', 'pr-10']
+  const pr = props.clearable && props.modelValue ? 'pr-16' : 'pr-10'
+  const base = ['input', 'input-bordered', 'w-full', pr]
   if (props.size === 'xs') base.push('input-xs')
   if (props.size === 'sm') base.push('input-sm')
   if (props.size === 'lg') base.push('input-lg')
@@ -269,9 +284,17 @@ function handleInput () {
   emit('search', searchTerm.value)
 }
 
+function clearSelection () {
+  emit('update:modelValue', '')
+  searchTerm.value = ''
+  openDropdown.value = false
+}
+
 function closeDropdown () {
   openDropdown.value = false
-  if (selectedOption.value) {
+  if (searchTerm.value.trim() === '' && selectedOption.value) {
+    emit('update:modelValue', '')
+  } else if (selectedOption.value) {
     searchTerm.value = resolveLabel(selectedOption.value)
   }
 }