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/blueprints/measure.py

@@ -124,21 +124,15 @@ def task_execute(task_id: int):
     # Load all task IDs for this recipe (ordered) for auto-advance
     recipe_id = task_resp.get("recipe_id")
     all_task_ids = []
-    recipe_resp = {}
     if recipe_id:
         tasks_resp = api_client.get(f"/api/recipes/{recipe_id}/tasks")
         if isinstance(tasks_resp, list):
             sorted_tasks = sorted(tasks_resp, key=lambda t: t.get("order_index", 0))
             all_task_ids = [t["id"] for t in sorted_tasks]
-        # Fetch recipe for image_path
-        resp = api_client.get(f"/api/recipes/{recipe_id}")
-        if not (isinstance(resp, dict) and resp.get("error")):
-            recipe_resp = resp
 
     return render_template(
         "measure/task_execute.html",
         task=task_resp,
-        recipe=recipe_resp,
         lot_number=lot_number,
         serial_number=serial_number,
         all_task_ids=all_task_ids,