Add regional task templates to onboarding with multiple bug fixes

- Fetch regional templates by ZIP during onboarding and display categorized
  task suggestions (iOS + KMM shared layer)
- Fix multi-expand for task categories (toggle independently, not exclusive)
- Fix ScrollViewReader auto-scroll to expanded category sections
- Fix UUID stability bug: cache task categories to prevent ID regeneration
  that caused silent task creation failures
- Fix stale data after onboarding: force refresh residences and tasks in
  RootView onComplete callback
- Fix address formatting: show just ZIP code when city/state are empty
  instead of showing ", 75028" with leading comma

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

iosApp/iosApp/Localizable.xcstrings

@@ -46,18 +46,6 @@
       "comment" : "A message displayed when a contractor is successfully imported to the user's contacts. The placeholder is replaced with the name of the imported contractor.",
       "isCommentAutoGenerated" : true
     },
-    "%@, %@ %@" : {
-      "comment" : "A label displaying the city, state, and postal code of the residence.",
-      "isCommentAutoGenerated" : true,
-      "localizations" : {
-        "en" : {
-          "stringUnit" : {
-            "state" : "new",
-            "value" : "%1$@, %2$@ %3$@"
-          }
-        }
-      }
-    },
     "%@: %@" : {
       "comment" : "An error message displayed when there was an issue loading tasks for a residence.",
       "isCommentAutoGenerated" : true,
@@ -146,6 +134,9 @@
           }
         }
       }
+    },
+    "12345" : {
+
     },
     "ABC123" : {
 
@@ -5264,6 +5255,9 @@
     },
     "CONFIRM PASSWORD" : {
 
+    },
+    "Continue" : {
+
     },
     "Continue with Free" : {
 
@@ -16992,6 +16986,9 @@
     "Enter your email address and we'll send you a verification code" : {
       "comment" : "A description below the email input field, instructing the user to enter their email address to receive a password reset code.",
       "isCommentAutoGenerated" : true
+    },
+    "Enter your ZIP code so we can suggest\nmaintenance tasks for your climate region." : {
+
     },
     "Error" : {
       "comment" : "The title of an alert that appears when there's an error.",
@@ -17358,6 +17355,9 @@
     },
     "Help improve Casera by sharing anonymous usage data" : {
 
+    },
+    "Here are tasks recommended for your area.\nPick the ones you'd like to track!" : {
+
     },
     "Hour" : {
       "comment" : "A picker for selecting an hour.",
@@ -30125,6 +30125,9 @@
     "Welcome to Your Space" : {
       "comment" : "A welcoming message displayed at the top of the \"Organic Empty Residences\" view.",
       "isCommentAutoGenerated" : true
+    },
+    "Where's your home?" : {
+
     },
     "You now have access to %@." : {
       "comment" : "A message displayed when a user successfully imports a residence, indicating that they now have access to it. The argument is the name of the residence that was imported.",