Add task completion animations and fix 7-day task count

Animation Testing:
- Add AnimationTesting module with 14 animation types for task completion
- Include 4 celebration animations: Implode, Firework, Starburst, Ripple
- Card shrinks, shows checkmark with effect, then moves to next column
- Extended timing (2.2s) for celebration animations

Task Count Fix:
- Fix "7 Days" and "30 Days" counts on residence cards and dashboard
- Previously used API column membership (30-day "due soon" column)
- Now calculates actual days until due from task's effectiveDueDate
- Correctly counts tasks due within 7 days vs 8-30 days

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

iosApp/iosApp/Localizable.xcstrings

@@ -171,6 +171,14 @@
       "comment" : "A link that directs users to log in if they already have an account.",
       "isCommentAutoGenerated" : true
     },
+    "Animation Testing" : {
+      "comment" : "The title of a view that tests different animations.",
+      "isCommentAutoGenerated" : true
+    },
+    "Animation Type" : {
+      "comment" : "A label above the picker for selecting an animation type.",
+      "isCommentAutoGenerated" : true
+    },
     "app_name" : {
       "extractionState" : "manual",
       "localizations" : {
@@ -17440,6 +17448,10 @@
     },
     "No shared users" : {
 
+    },
+    "No Tasks" : {
+      "comment" : "A description displayed when there are no tasks to display in a column view.",
+      "isCommentAutoGenerated" : true
     },
     "No tasks yet" : {
       "comment" : "A description displayed when a user has no tasks.",
@@ -21558,6 +21570,10 @@
       "comment" : "A button that replays the current animation.",
       "isCommentAutoGenerated" : true
     },
+    "Reset All Tasks" : {
+      "comment" : "A button label that resets all tasks.",
+      "isCommentAutoGenerated" : true
+    },
     "Reset Password" : {
       "comment" : "The title of the screen where users can reset their passwords.",
       "isCommentAutoGenerated" : true