fix: separate recipe preview image from task images

Recipe image_path is now used as preview thumbnail only. Removed
auto-creation of "Technical Drawing" task from recipe upload, and
removed recipe image strip from task_execute view. Each task displays
its own file_path independently.

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

client/templates/maker/recipe_editor.html

@@ -438,8 +438,8 @@ function recipeEditor() {
     versions: {{ (recipe.versions if recipe and recipe.versions else [])|tojson }},
     currentVersion: {{ (recipe.current_version.version_number if recipe and recipe.current_version else 0)|tojson }},
 
-    // ---- File upload (thumbnail) ----
-    currentFilePath: {{ (recipe.current_version.tasks[0].file_path if recipe and recipe.current_version and recipe.current_version.tasks and recipe.current_version.tasks|length > 0 and recipe.current_version.tasks[0].file_path else '')|tojson }},
+    // ---- File upload (preview image) ----
+    currentFilePath: {{ (recipe.image_path if recipe and recipe.image_path else '')|tojson }},
     uploadingFile: false,
     dragOver: false,
 
@@ -459,9 +459,9 @@ function recipeEditor() {
         description: this.description.trim(),
       };
 
-      // Include file_path for thumbnail
+      // Include image_path for preview thumbnail
       if (this.currentFilePath) {
-        payload.file_path = this.currentFilePath;
+        payload.image_path = this.currentFilePath;
       }
 
       // Include change notes if editing

client/templates/maker/recipe_list.html

@@ -153,9 +153,9 @@
           <!-- Card Header -->
           <div class="flex flex-col sm:flex-row sm:items-start gap-4 mb-4">
             <!-- Thumbnail -->
-            <template x-if="recipe.current_version && recipe.current_version.tasks && recipe.current_version.tasks.find(t => t.file_path && t.file_type === 'image')">
+            <template x-if="recipe.image_path">
               <div class="w-20 h-20 rounded-lg overflow-hidden bg-[var(--bg-secondary)] border border-[var(--border-color)] shrink-0">
-                <img :src="'/maker/api/files/' + recipe.current_version.tasks.find(t => t.file_path && t.file_type === 'image').file_path"
+                <img :src="'/maker/api/files/' + recipe.image_path"
                      class="w-full h-full object-cover"
                      loading="lazy"
                      onerror="this.parentElement.style.display='none'">

client/templates/measure/task_execute.html

@@ -55,7 +55,6 @@
   window.__taskSubtasks = {{ task.subtasks|tojson if task.subtasks else '[]' }};
   window.__taskAnnotations = {{ task.annotations_json|default('null')|tojson }};
   window.__allTaskIds = {{ all_task_ids|tojson }};
-  window.__recipeImagePath = {{ (recipe.image_path or '')|tojson }};
 </script>
 
 <div class="h-screen flex flex-col overflow-hidden"
@@ -173,13 +172,6 @@
        ────────────────────────────────────────────── #}
     <div class="flex-1 flex flex-col overflow-hidden bg-[var(--bg-secondary)]">
 
-      {# Recipe image strip (small, top, optional) #}
-      <div x-show="recipeImagePath" class="shrink-0 bg-[var(--bg-card)] border-b border-[var(--border-color)] px-2 py-1 flex items-center justify-center">
-        <img :src="'/measure/api/files/' + recipeImagePath"
-             alt="{{ _('Immagine ricetta') }}"
-             class="max-h-20 object-contain rounded">
-      </div>
-
       {# Main image area #}
       <div class="flex-1 overflow-hidden relative">
 
@@ -490,8 +482,6 @@ function taskExecute() {
     subtasks: window.__taskSubtasks,
     lotNumber: '{{ lot_number or '' }}',
     serialNumber: '{{ serial_number or '' }}',
-    recipeImagePath: window.__recipeImagePath || '',
-
     // ---- Measurement state ----
     currentIndex: 0,
     measurements: [],   // [{subtask_id, value, pass_fail, deviation}, ...]