format: apply repo prettier (3.8.1) to the folded skills tree

963 markdown files reformatted with the repository's pinned prettier so
pnpm format:check covers the folded tree like every other repo file.

The formatter's embedded-language pass also normalized code fences
(TS semicolons, closed HTML tags in examples, lowercased CSS hex colors,
one renumbered list that skipped an index). Alphanumeric token deltas vs
the fold commit were audited file-by-file; all are formatter-equivalent
markup normalizations plus the four sanitized skills.

packages/mosaic/framework/skills/vue-best-practices/reference/watch-deep-same-object-reference.md

@@ -21,15 +21,16 @@ Don't rely on comparing `newValue` to `oldValue` in deep watchers for detecting
 - [ ] The values differ only when the entire object is replaced
 
 **Incorrect:**
+
 ```javascript
-import { reactive, watch } from 'vue'
+import { reactive, watch } from 'vue';
 
 const state = reactive({
   user: {
     name: 'John',
-    preferences: { theme: 'dark' }
-  }
-})
+    preferences: { theme: 'dark' },
+  },
+});
 
 // BAD: Trying to compare old and new values
 watch(
@@ -37,105 +38,106 @@ watch(
   (newUser, oldUser) => {
     // This comparison is ALWAYS true for nested mutations!
     if (newUser === oldUser) {
-      console.log('Same reference!')  // Always logs for nested changes
+      console.log('Same reference!'); // Always logs for nested changes
     }
 
     // This also won't work - they're the same object
     if (newUser.name !== oldUser.name) {
-      console.log('Name changed')  // Never logs for nested mutations
+      console.log('Name changed'); // Never logs for nested mutations
     }
   },
-  { deep: true }
-)
+  { deep: true },
+);
 
 // When this happens:
-state.user.name = 'Jane'
+state.user.name = 'Jane';
 // Both newUser and oldUser are { name: 'Jane', preferences: { theme: 'dark' } }
 ```
 
 **Correct:**
+
 ```javascript
-import { reactive, watch, ref } from 'vue'
+import { reactive, watch, ref } from 'vue';
 
 const state = reactive({
   user: {
     name: 'John',
-    preferences: { theme: 'dark' }
-  }
-})
+    preferences: { theme: 'dark' },
+  },
+});
 
 // CORRECT: Watch specific properties you care about
 watch(
   () => state.user.name,
   (newName, oldName) => {
-    console.log(`Name changed from "${oldName}" to "${newName}"`)
+    console.log(`Name changed from "${oldName}" to "${newName}"`);
     // oldName and newName are primitives, work correctly
-  }
-)
+  },
+);
 
 // CORRECT: Watch multiple specific properties
 watch(
   [() => state.user.name, () => state.user.preferences.theme],
   ([newName, newTheme], [oldName, oldTheme]) => {
     if (newName !== oldName) {
-      console.log(`Name: ${oldName} -> ${newName}`)
+      console.log(`Name: ${oldName} -> ${newName}`);
     }
     if (newTheme !== oldTheme) {
-      console.log(`Theme: ${oldTheme} -> ${newTheme}`)
+      console.log(`Theme: ${oldTheme} -> ${newTheme}`);
     }
-  }
-)
+  },
+);
 ```
 
 ## Manual Snapshot Pattern
 
 ```javascript
-import { reactive, watch, ref } from 'vue'
+import { reactive, watch, ref } from 'vue';
 
-const state = reactive({ count: 0, items: [] })
+const state = reactive({ count: 0, items: [] });
 
 // Keep a manual snapshot for comparison
-const previousSnapshot = ref(JSON.stringify(state))
+const previousSnapshot = ref(JSON.stringify(state));
 
 watch(
   state,
   (newState) => {
-    const currentSnapshot = JSON.stringify(newState)
+    const currentSnapshot = JSON.stringify(newState);
 
     if (currentSnapshot !== previousSnapshot.value) {
-      const oldData = JSON.parse(previousSnapshot.value)
-      console.log('Old:', oldData)
-      console.log('New:', newState)
+      const oldData = JSON.parse(previousSnapshot.value);
+      console.log('Old:', oldData);
+      console.log('New:', newState);
 
       // Update snapshot for next comparison
-      previousSnapshot.value = currentSnapshot
+      previousSnapshot.value = currentSnapshot;
     }
   },
-  { deep: true }
-)
+  { deep: true },
+);
 ```
 
 ## When Old and New Values Differ
 
 ```javascript
-import { reactive, watch } from 'vue'
+import { reactive, watch } from 'vue';
 
 const state = reactive({
-  currentUser: { name: 'John' }
-})
+  currentUser: { name: 'John' },
+});
 
 watch(
   () => state.currentUser,
   (newUser, oldUser) => {
     // THESE DIFFER when the object itself is replaced
-    console.log('Old:', oldUser)  // { name: 'John' }
-    console.log('New:', newUser)  // { name: 'Jane' }
+    console.log('Old:', oldUser); // { name: 'John' }
+    console.log('New:', newUser); // { name: 'Jane' }
   },
-  { deep: true }
-)
+  { deep: true },
+);
 
 // Object replacement - old and new are different
-state.currentUser = { name: 'Jane' }
+state.currentUser = { name: 'Jane' };
 
 // vs. Mutation - old and new are the same reference
 // state.currentUser.name = 'Jane'
@@ -144,22 +146,23 @@ state.currentUser = { name: 'Jane' }
 ## Using Getter Returns New Object
 
 ```javascript
-import { reactive, watch } from 'vue'
+import { reactive, watch } from 'vue';
 
 const state = reactive({
-  user: { firstName: 'John', lastName: 'Doe' }
-})
+  user: { firstName: 'John', lastName: 'Doe' },
+});
 
 // CORRECT: Getter returns new object, so old/new comparison works
 watch(
-  () => ({ ...state.user }),  // Shallow clone
+  () => ({ ...state.user }), // Shallow clone
   (newUser, oldUser) => {
     // Now these are different objects
-    console.log('Changed from', oldUser, 'to', newUser)
+    console.log('Changed from', oldUser, 'to', newUser);
   },
-  { deep: true }
-)
+  { deep: true },
+);
 ```
 
 ## Reference
+
 - [Vue.js Watchers - Deep Watchers](https://vuejs.org/guide/essentials/watchers.html#deep-watchers)