fix: test-email actually sends; vote page pre-checks existing votes; lowercase MealPlanItemStatus everywhere

- /api/admin/test-email now calls get_email_backend().send() instead of only logging.
- /api/meals/vote/{id} GET now queries MealPlanVote and renders 'already voted' confirmation if found.
- api/meals.py: fix remaining uppercase MealPlanItemStatus enum ref (DENIED, APPROVED, PENDING).
- Fixes the 'all meals show as pending' status regression and the 'Error: Already voted' bug.

backend/app/services/orchestrator/steps.py

@@ -126,7 +126,7 @@ def step_email(run: "WeeklyRun", db: "Session") -> None:
     # Preload ingredient names for all pending items
     ing_ids: set = set()
     for _item in plan.items:
-        if _item.approval_status == MealPlanItemStatus.PENDING and _item.recipe:
+        if _item.approval_status == MealPlanItemStatus.pending and _item.recipe:
             for _ing in (_item.recipe.ingredients or []):
                 if "ingredient_id" in _ing:
                     ing_ids.add(_ing["ingredient_id"])
@@ -141,7 +141,7 @@ def step_email(run: "WeeklyRun", db: "Session") -> None:
     # Build shopping list preview once (shared across all member emails)
     all_ingredients: dict[str, tuple[str, str, str, str]] = {}
     for item in plan.items:
-        if item.approval_status != MealPlanItemStatus.PENDING:
+        if item.approval_status != MealPlanItemStatus.pending:
             continue
         for ing in (item.recipe.ingredients or [] if item.recipe else []):
             ing_name = ingredient_names.get(str(ing.get("ingredient_id", "")), ing.get("name", "unknown")).strip()
@@ -193,7 +193,7 @@ def step_email(run: "WeeklyRun", db: "Session") -> None:
     for member in members:
         item_html_parts = []
         for item in plan.items:
-            if item.approval_status != MealPlanItemStatus.PENDING:
+            if item.approval_status != MealPlanItemStatus.pending:
                 continue
             token = issue_token(item.id, member.id)
             vote_url = (
@@ -317,11 +317,11 @@ def step_deadline(run: "WeeklyRun", db: "Session") -> None:
 
     resolved = 0
     for item in plan.items:
-        if item.approval_status == MealPlanItemStatus.PENDING:
+        if item.approval_status == MealPlanItemStatus.pending:
             item.approval_status = (
-                MealPlanItemStatus.APPROVED
+MealPlanItemStatus.approved
                 if policy == "approve"
-                else MealPlanItemStatus.DENIED
+                else MealPlanItemStatus.denied
             )
             resolved += 1
 
@@ -351,7 +351,7 @@ def step_finalize(run: "WeeklyRun", db: "Session") -> None:
     approved_items = [
         item
         for item in (plan.items if plan else [])
-        if item.approval_status == MealPlanItemStatus.APPROVED
+        if item.approval_status == MealPlanItemStatus.approved
     ]
 
     members = (
@@ -482,7 +482,7 @@ def step_reminder(run: "WeeklyRun", db: "Session") -> None:
     pending_item_ids = [
         item.id
         for item in plan.items
-        if item.approval_status == MealPlanItemStatus.PENDING
+        if item.approval_status == MealPlanItemStatus.pending
     ]
     if not pending_item_ids:
         run.reminded_at = datetime.now(timezone.utc)
@@ -512,7 +512,7 @@ def step_reminder(run: "WeeklyRun", db: "Session") -> None:
         unvoted = [
             item
             for item in plan.items
-            if item.approval_status == MealPlanItemStatus.PENDING
+            if item.approval_status == MealPlanItemStatus.pending
             and item.id not in voted_ids
         ]
         if not unvoted: