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>

client/templates/maker/recipe_list.html

@@ -152,6 +152,16 @@
         <div class="p-5 sm:p-6">
           <!-- 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')">
+              <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"
+                     class="w-full h-full object-cover"
+                     loading="lazy"
+                     onerror="this.parentElement.style.display='none'">
+              </div>
+            </template>
+
             <!-- Left: Recipe Info -->
             <div class="flex-1 min-w-0">
               <!-- Badges Row -->