Add end-to-end tests for task modification and assignment features

- Implemented tests for editing penalty points and reward costs in `penalty-edit-points.spec.ts` and `reward-edit-cost.spec.ts`.
- Created detailed plans for task activation and assignment scenarios in `task-activated.plan.md` and `task-assignment.plan.md`.
- Added comprehensive test cases for modifying tasks, including editing points for chores, kindness acts, penalties, and rewards in `task-modified.plan.md`.
- Ensured all tests are isolated and run in serial mode to maintain state integrity.

frontend/vue-app/playwright.config.ts

@@ -71,6 +71,33 @@ export default defineConfig({
       fullyParallel: false,
     },
 
+    {
+      // Bucket: task and reward assignment tests for individual children.
+      // Serial mode within each file ensures assign → verify → unassign → cancel flow order.
+      name: 'chromium-task-assignment',
+      use: { ...devices['Desktop Chrome'], storageState: STORAGE_STATE },
+      dependencies: ['setup'],
+      testMatch: [/mode_parent\/task-assignment\/.+\.spec\.ts/],
+    },
+
+    {
+      // Bucket: task activation and reward redemption tests — each spec creates its own
+      // isolated child so the 4 files can safely run in parallel within this bucket.
+      name: 'chromium-task-activation',
+      use: { ...devices['Desktop Chrome'], storageState: STORAGE_STATE },
+      dependencies: ['setup'],
+      testMatch: [/mode_parent\/task-activation\/.+\.spec\.ts/],
+    },
+
+    {
+      // Bucket: task modification tests — each spec creates its own isolated child
+      // so the 6 files can safely run in parallel within this bucket.
+      name: 'chromium-task-modification',
+      use: { ...devices['Desktop Chrome'], storageState: STORAGE_STATE },
+      dependencies: ['setup'],
+      testMatch: [/mode_parent\/task-modification\/.+\.spec\.ts/],
+    },
+
     {
       name: 'chromium-tasks-rewards',
       use: { ...devices['Desktop Chrome'], storageState: STORAGE_STATE },
@@ -79,6 +106,9 @@ export default defineConfig({
         /\/mode_child\//,
         /mode_parent\/(create-child|child-options)\//,
         /mode_parent\/tasks\/.*default\.spec\.ts/,
+        /mode_parent\/task-assignment\//,
+        /mode_parent\/task-activation\//,
+        /mode_parent\/task-modification\//,
       ],
     },