fix: Task back button navigates to correct recipe (not version_id)

- Add recipe_id property to RecipeTask model (via version relationship)
- Add recipe_id to TaskResponse schema
- Eager-load version in _get_task_or_404 query
- Use task.recipe_id instead of task.version_id in task_execute template URLs

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

client/templates/measure/task_execute.html

@@ -72,7 +72,7 @@
         <div class="flex-1 min-w-0">
           {# Breadcrumb line #}
           <div class="flex items-center gap-2 mb-1.5 flex-wrap">
-            <a href="{{ url_for('measure.task_list', recipe_id=task.version_id or task.recipe_id or 0) }}"
+            <a href="{{ url_for('measure.task_list', recipe_id=task.recipe_id or 0) }}"
                class="text-xs text-[var(--text-muted)] hover:text-primary transition-colors inline-flex items-center gap-1">
               <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
                 <path stroke-linecap="round" stroke-linejoin="round" d="M10 19l-7-7m0 0l7-7m-7 7h18"/>
@@ -410,7 +410,7 @@
       <div class="flex items-center gap-4">
 
         {# Left: Back button #}
-        <a href="{{ url_for('measure.task_list', recipe_id=task.version_id or task.recipe_id or 0) }}"
+        <a href="{{ url_for('measure.task_list', recipe_id=task.recipe_id or 0) }}"
            class="btn btn-secondary text-xs shrink-0 gap-1.5">
           <svg class="w-3.5 h-3.5" fill="none" stroke="currentColor" stroke-width="2" viewBox="0 0 24 24">
             <path stroke-linecap="round" stroke-linejoin="round" d="M10 19l-7-7m0 0l7-7m-7 7h18"/>
@@ -736,7 +736,7 @@ function taskExecute() {
 
     // ---- Go to summary ----
     goToSummary() {
-      const recipeId = this.task.version_id || this.task.recipe_id || 0;
+      const recipeId = this.task.recipe_id || 0;
       window.location.href = '{{ url_for("measure.task_complete", recipe_id=0) }}'.replace('/0', '/' + recipeId) +
         '?version_id=' + encodeURIComponent(this.task.version_id || '');
     },

server/models/task.py

@@ -39,6 +39,13 @@ class RecipeTask(Base):
         {"mysql_engine": "InnoDB", "mysql_charset": "utf8mb4"},
     )
 
+    @property
+    def recipe_id(self) -> int | None:
+        """Shortcut: recipe_id via the version relationship."""
+        if self.version:
+            return self.version.recipe_id
+        return None
+
     def __repr__(self) -> str:
         return f"<RecipeTask #{self.order_index} '{self.title}'>"
 

server/routers/tasks.py

@@ -55,7 +55,10 @@ async def _get_task_or_404(db: AsyncSession, task_id: int) -> RecipeTask:
     result = await db.execute(
         select(RecipeTask)
         .where(RecipeTask.id == task_id)
-        .options(selectinload(RecipeTask.subtasks))
+        .options(
+            selectinload(RecipeTask.subtasks),
+            selectinload(RecipeTask.version),
+        )
     )
     task = result.scalar_one_or_none()
     if task is None:

server/schemas/task.py

@@ -73,6 +73,7 @@ class TaskResponse(BaseModel):
 
     id: int
     version_id: int
+    recipe_id: Optional[int] = None
     order_index: int
     title: str
     directive: Optional[str] = None