Implement Recipe, Planning, Shopping, Pantry, and Admin domains

Outside-in TDD for all 5 remaining domains (128 tests total):
- Recipe: CRUD, ingredients autocomplete/patch, tags, categories (27 tests)
- Planning: week plans, slots, confirm, suggestions, variety score, cooking logs (24 tests)
- Shopping: generate from plan, publish, check/add/remove items (15 tests)
- Pantry: CRUD with expiry sorting (11 tests)
- Admin: user management, password reset, audit logging (13 tests)

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

backend/src/main/java/com/recipeapp/planning/dto/CookingLogResponse.java

@@ -0,0 +1,6 @@
+package com.recipeapp.planning.dto;
+
+import java.time.LocalDate;
+import java.util.UUID;
+
+public record CookingLogResponse(UUID id, UUID recipeId, String recipeName, LocalDate cookedOn, UUID cookedBy) {}

backend/src/main/java/com/recipeapp/planning/dto/CreateCookingLogRequest.java

@@ -0,0 +1,7 @@
+package com.recipeapp.planning.dto;
+
+import jakarta.validation.constraints.NotNull;
+import java.time.LocalDate;
+import java.util.UUID;
+
+public record CreateCookingLogRequest(@NotNull UUID recipeId, LocalDate cookedOn) {}

backend/src/main/java/com/recipeapp/planning/dto/CreateSlotRequest.java

@@ -0,0 +1,7 @@
+package com.recipeapp.planning.dto;
+
+import jakarta.validation.constraints.NotNull;
+import java.time.LocalDate;
+import java.util.UUID;
+
+public record CreateSlotRequest(@NotNull LocalDate slotDate, @NotNull UUID recipeId) {}

backend/src/main/java/com/recipeapp/planning/dto/CreateWeekPlanRequest.java

@@ -0,0 +1,6 @@
+package com.recipeapp.planning.dto;
+
+import jakarta.validation.constraints.NotNull;
+import java.time.LocalDate;
+
+public record CreateWeekPlanRequest(@NotNull LocalDate weekStart) {}

backend/src/main/java/com/recipeapp/planning/dto/SlotResponse.java

@@ -0,0 +1,12 @@
+package com.recipeapp.planning.dto;
+
+import java.time.LocalDate;
+import java.util.UUID;
+
+public record SlotResponse(
+        UUID id,
+        LocalDate slotDate,
+        SlotRecipe recipe
+) {
+    public record SlotRecipe(UUID id, String name, String effort, short cookTimeMin, String heroImageUrl) {}
+}

backend/src/main/java/com/recipeapp/planning/dto/SuggestionResponse.java

@@ -0,0 +1,12 @@
+package com.recipeapp.planning.dto;
+
+import java.util.List;
+
+public record SuggestionResponse(List<SuggestionItem> suggestions) {
+
+    public record SuggestionItem(
+            SlotResponse.SlotRecipe recipe,
+            List<String> fitReasons,
+            List<String> warnings
+    ) {}
+}

backend/src/main/java/com/recipeapp/planning/dto/UpdateSlotRequest.java

@@ -0,0 +1,6 @@
+package com.recipeapp.planning.dto;
+
+import jakarta.validation.constraints.NotNull;
+import java.util.UUID;
+
+public record UpdateSlotRequest(@NotNull UUID recipeId) {}

backend/src/main/java/com/recipeapp/planning/dto/VarietyScoreResponse.java

@@ -0,0 +1,14 @@
+package com.recipeapp.planning.dto;
+
+import java.time.LocalDate;
+import java.util.List;
+import java.util.Map;
+
+public record VarietyScoreResponse(
+        double score,
+        List<IngredientOverlap> ingredientOverlaps,
+        List<String> proteinRepeats,
+        Map<String, Integer> effortBalance
+) {
+    public record IngredientOverlap(String ingredientName, List<LocalDate> days) {}
+}

backend/src/main/java/com/recipeapp/planning/dto/WeekPlanResponse.java

@@ -0,0 +1,14 @@
+package com.recipeapp.planning.dto;
+
+import java.time.Instant;
+import java.time.LocalDate;
+import java.util.List;
+import java.util.UUID;
+
+public record WeekPlanResponse(
+        UUID id,
+        LocalDate weekStart,
+        String status,
+        Instant confirmedAt,
+        List<SlotResponse> slots
+) {}