feat: per-task image/annotations, annotation editor toolbar, Tailwind compiled

- Add per-task file upload with image preview in task editor
- Add dedicated annotation editor page (task_drawing.html) with Fabric.js
- Add color picker, stroke width, and line dash controls to annotation toolbar
- Apply property changes to selected objects in real-time
- Disable style controls until a drawing tool or object is selected
- Remove zoom/pan from annotation toolbar (simplified UX)
- Auto-switch to select mode after placing annotation elements
- Show annotation overlay on task image previews (read-only canvas)
- Add file proxy route in measure blueprint for task file access
- Add file_path/file_type fields to TaskCreate/TaskUpdate Pydantic schemas
- Replace Tailwind CDN with compiled CSS (tailwind.config.js with full shades)
- Fix Alpine.js x-init crash: extract annotations JSON to <script> tags
  (recipe_preview.html, task_execute.html) to avoid HTML attribute breakage

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

server/services/recipe_service.py

@@ -381,10 +381,14 @@ async def list_recipes(
     pages = max(1, math.ceil(total / per_page))
     offset = (page - 1) * per_page
 
-    # Fetch recipes
+    # Fetch recipes with versions and tasks for thumbnail display
     stmt = (
         select(Recipe)
         .where(*base_filter)
+        .options(
+            selectinload(Recipe.versions)
+            .selectinload(RecipeVersion.tasks)
+        )
         .order_by(Recipe.name.asc())
         .offset(offset)
         .limit(per_page)