fix: real uid in bucket list, Firestore rules hardening for date plans & bucket list

app/src/main/java/app/closer/ui/dates/BucketListViewModel.kt

@@ -4,6 +4,7 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import app.closer.domain.model.BucketListItem
 import app.closer.domain.repository.BucketListRepository
+import com.google.firebase.auth.FirebaseAuth
 import dagger.hilt.android.lifecycle.HiltViewModel
 import javax.inject.Inject
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -48,7 +49,7 @@ class BucketListViewModel @Inject constructor(
             title = title.take(MAX_TITLE_LENGTH),
             description = description.take(MAX_DESCRIPTION_LENGTH),
             category = category,
-            addedBy = "currentUser",
+            addedBy = FirebaseAuth.getInstance().currentUser?.uid ?: "",
             addedAt = System.currentTimeMillis()
         )
 
@@ -71,7 +72,7 @@ class BucketListViewModel @Inject constructor(
                     )
                 }
             } else {
-                repository.completeItem(itemId, "currentUser")
+                repository.completeItem(itemId, FirebaseAuth.getInstance().currentUser?.uid ?: "")
                 _uiState.update {
                     it.copy(
                         items = it.items.map {

firestore.rules

@@ -47,6 +47,16 @@ service cloud.firestore {
       return action == 'love' || action == 'maybe' || action == 'skip';
     }
 
+    function isValidDatePlanStatus(status) {
+      return status == 'draft' || status == 'planned' || status == 'completed';
+    }
+
+    function isValidBucketListCategory(category) {
+      return category == 'adventure' || category == 'travel' || category == 'food'
+          || category == 'learning' || category == 'romance' || category == 'intimacy'
+          || category == 'seasonal';
+    }
+
     // ── Users ─────────────────────────────────────────────────────────────────
     // Each user owns exactly their own document.
     // hasPremium is server-only: clients may not write it directly.
@@ -293,17 +303,51 @@ service cloud.firestore {
       }
 
       // Date plans: complete plans assembled from partner preferences.
-      // Both members can read; create/update/delete by both members.
+      // Both members can read and delete; writes are field-validated.
+      // createdAt is immutable after creation (excluded from the update allowed-keys set).
       match /date_plans/{planId} {
         allow read: if isCouplesMember(coupleId);
-        allow create, update, delete: if isCouplesMember(coupleId);
+        allow create: if isCouplesMember(coupleId)
+          && request.resource.data.keys().hasAll(['dateIdeaId', 'scheduledDate', 'status', 'createdAt', 'updatedAt'])
+          && request.resource.data.keys().hasOnly([
+               'dateIdeaId', 'scheduledDate', 'scheduledTime', 'budget', 'duration',
+               'status', 'activity', 'food', 'conversationPrompts', 'optionalChallenge',
+               'createdAt', 'updatedAt'
+             ])
+          && isValidDatePlanStatus(request.resource.data.status);
+        allow update: if isCouplesMember(coupleId)
+          // Only the explicitly-listed fields may change on update.
+          // createdAt is intentionally absent — it cannot be modified after creation.
+          && request.resource.data.diff(resource.data).affectedKeys().hasOnly([
+               'dateIdeaId', 'scheduledDate', 'scheduledTime', 'budget', 'duration',
+               'status', 'activity', 'food', 'conversationPrompts', 'optionalChallenge',
+               'updatedAt'
+             ])
+          && isValidDatePlanStatus(request.resource.data.status);
+        allow delete: if isCouplesMember(coupleId);
       }
 
       // Bucket list items: shared list for both partners.
-      // Both members can read; create/update/delete by both members.
+      // addedBy must match the caller on creation; addedBy and addedAt are immutable.
+      // Marking an item complete requires the caller to own the completedBy field.
       match /bucket_list/{itemId} {
         allow read: if isCouplesMember(coupleId);
-        allow create, update, delete: if isCouplesMember(coupleId);
+        allow create: if isCouplesMember(coupleId)
+          && request.resource.data.keys().hasAll(['title', 'addedBy', 'addedAt', 'isCompleted'])
+          && request.resource.data.keys().hasOnly([
+               'title', 'description', 'category', 'addedBy', 'addedAt',
+               'completedBy', 'completedAt', 'isCompleted'
+             ])
+          && request.resource.data.addedBy == request.auth.uid
+          && isValidBucketListCategory(request.resource.data.category);
+        allow update: if isCouplesMember(coupleId)
+          && request.resource.data.diff(resource.data).affectedKeys().hasOnly([
+               'title', 'description', 'category', 'isCompleted', 'completedBy', 'completedAt'
+             ])
+          && isImmutable(['addedBy', 'addedAt'])
+          // completedBy must be the caller when marking an item complete
+          && (!request.resource.data.isCompleted || request.resource.data.completedBy == request.auth.uid);
+        allow delete: if isCouplesMember(coupleId);
       }
     }
   }