docs: make example code fences copy-safe (#5833)

docs/platform/features/criteria-retrieval.mdx

@@ -117,7 +117,7 @@ results_without_criteria = client.search(
 ### Compare Results
 
 ### Search Results (with Criteria)
-```python
+```text
 [
     {"memory": "User feels refreshed and ready to take on anything on a beautiful sunny day", "score": 0.666, ...},
     {"memory": "User finally has time to draw something after a long time", "score": 0.616, ...},
@@ -128,7 +128,7 @@ results_without_criteria = client.search(
 ```
 
 ### Search Results (without Criteria)
-```python
+```text
 [
     {"memory": "User is happy today", "score": 0.607, ...},
     {"memory": "User feels refreshed and ready to take on anything on a beautiful sunny day", "score": 0.512, ...},

docs/platform/features/custom-categories.mdx

@@ -190,7 +190,7 @@ messages = [
 client.add(messages, user_id='alice')
 ```
 
-```python Memories with categories
+```text Memories with categories
 # Following categories will be created for the memories added
 Sometimes draws and sketches in free time (hobbies)
 Is quite athletic (sports)

docs/platform/features/memory-export.mdx

@@ -108,10 +108,10 @@ print(response)
 
 ```javascript JavaScript
 // Basic Export request
-const filters = {"user_id": "alice"};
+const basicFilters = {"user_id": "alice"};
 const response = await client.createMemoryExport({
     schema: json_schema,
-    filters: filters
+    filters: basicFilters
 });
 
 // Export with custom instructions and additional filters
@@ -124,16 +124,16 @@ const export_instructions = `
 `;
 
 // For create operation, using only user_id filter as requested
-const filters = {
+const exportFilters = {
     "AND": [
         {"user_id": "alex"},
         {"created_at": {"gte": "2024-01-01"}}
     ]
-}
+};
 
 const responseWithInstructions = await client.createMemoryExport({
     schema: json_schema,
-    filters: filters,
+    filters: exportFilters,
     exportInstructions: export_instructions
 });