Fix collection manager JavaScript errors after attribute naming changes

- Update collection manager to use data-collection-id instead of data-content-id
- Add safety checks to prevent undefined Map access in addItemControls
- Add validation in editor to only initialize collections with valid collection IDs
- Resolves TypeError and missing attribute errors in frontend collection management

COLLECTION_REORDER_FIX.md

@@ -1,138 +0,0 @@
-# Collection Reordering Bug Fix - Implementation Plan
-
-## Problem Summary
-Collection item reordering fails after content edits. Position updates work at API level but don't persist through the enhancement cycle, causing items to revert to original order after page refresh.
-
-## Root Cause Analysis
-1. **Missing HTML Attributes**: `data-item-id` not injected during enhancement (around line 622 in `reconstructCollectionItems()`)
-2. **API Design Flaw**: No bulk reorder endpoint, only individual item updates 
-3. **ID Generation Inconsistency**: Different patterns for initial items vs new items
-4. **Attribute Naming Issues**: Collection containers incorrectly use `data-content-id`, content has special `collection-item-` prefixes
-5. **Obsolete Attributes**: `data-content-type` no longer needed after HTML-only switch
-6. **Dynamic vs Static**: Frontend dynamically injects IDs instead of getting them from enhanced HTML
-
-## Architecture Principles
-- **Static Enhancement**: All IDs should be injected during enhancement, not dynamically by JavaScript
-- **Unified ID Generation**: Same deterministic system for all entities (content, collections, items)
-- **Clean Separation**: Collections manage structure, `.insertr` elements manage content
-- **No Backwards Compatibility**: Clean slate approach, all test data can be cleared
-
-## Implementation Plan
-
-### Phase 1: Backend Enhancement Fixes
-
-#### File: `/home/fitz/insertr/internal/engine/engine.go`
-- **Line 622**: Add `data-item-id` injection in `reconstructCollectionItems()`
-- **Line 812**: Replace `initial-` ID pattern with unified generator
-- **Line 734**: Replace timestamp-based ID pattern with unified generator  
-- **Line 107**: Change collection containers from `data-content-id` to `data-collection-id`
-
-#### File: `/home/fitz/insertr/internal/engine/injector.go`
-- **Line 165**: Remove obsolete `data-content-type` attribute injection
-
-### Phase 2: Frontend API Updates
-
-#### File: `/home/fitz/insertr/lib/src/core/api-client.js`
-- Add `reorderCollection()` method for bulk operations
-- Remove `updateCollectionItemPosition()` method (individual updates)
-
-#### File: `/home/fitz/insertr/lib/src/ui/collection-manager.js`
-- Remove dynamic ID injection logic (around line 286)
-- Update attribute names from `data-collection-item-id` to `data-item-id`
-- Replace individual position updates with bulk reorder calls
-
-### Phase 3: Backend API Enhancement
-
-#### File: `/home/fitz/insertr/internal/api/handlers.go`
-- Add `ReorderCollection` handler for bulk position updates
-- Endpoint: `PUT /api/sites/{siteId}/collections/{collectionId}/reorder`
-
-## Expected HTML Output Change
-
-### Before
-```html
-<div class="testimonials insertr-add" data-content-id="index-testimonials-3ef43e">
-  <div class="testimonial-item">  <!-- Missing data-item-id -->
-    <blockquote class="insertr" data-content-id="collection-item-blockquote-756544" data-content-type="html">
-```
-
-### After
-```html
-<div class="testimonials insertr-add" data-collection-id="index-testimonials-3ef43e">
-  <div class="testimonial-item" data-item-id="index-testimonials-3ef43e-abc123">
-    <blockquote class="insertr" data-content-id="index-blockquote-def456">
-```
-
-## Implementation Steps
-
-### Day 1: Backend Enhancement
-1. **Clear test data**: Clean database for fresh start
-2. **Fix ID injection**: Add `data-item-id` attributes during enhancement
-3. **Unify ID generation**: Replace inconsistent patterns with unified system
-4. **Update attribute names**: Change `data-content-id` to `data-collection-id` for collections
-5. **Remove obsolete attributes**: Clean up `data-content-type`
-
-### Day 2: Frontend Updates  
-1. **Remove dynamic injection**: Stop generating IDs in JavaScript
-2. **Update attribute references**: Change to new naming convention
-3. **Add bulk reorder API**: Implement `reorderCollection()` method
-4. **Update collection manager**: Use bulk operations instead of individual updates
-
-### Day 3: Backend API
-1. **Add bulk reorder endpoint**: Implement `ReorderCollection` handler
-2. **Route configuration**: Add PUT endpoint for bulk reorder
-3. **Database operations**: Efficient bulk position updates
-
-### Day 4: Testing & Validation
-1. **Test enhancement cycle**: Verify positions persist after content edits
-2. **Test reordering**: Ensure drag-and-drop works correctly
-3. **Test page refresh**: Confirm order maintained after reload
-4. **Cross-browser testing**: Verify compatibility
-
-## Current Status
-- ✅ API endpoint accepts `site_id` as query parameter correctly
-- ✅ Root cause analysis complete
-- ✅ Implementation plan finalized
-- ✅ **Phase 1 COMPLETE**: Backend enhancement injection implemented
-- ✅ Unified ID generation across all entities (collections, items, content)
-- ✅ Data attribute injection working (data-collection-id, data-item-id, data-content-id)
-- ✅ Obsolete attributes removed (data-content-type)
-- ✅ **Phase 2 COMPLETE**: Frontend API updates implemented
-- ✅ Dynamic ID injection removed (except for new items from server)
-- ✅ Attribute references updated to data-item-id
-- ✅ Bulk reorderCollection() API method added
-- ✅ Individual updateCollectionItemPosition() method removed
-- ✅ Collection manager uses bulk reorder with optimistic UI
-- ✅ **Phase 3 COMPLETE**: Backend bulk reorder endpoint implemented
-- ✅ ReorderCollection handler added with transaction-based bulk updates
-- ✅ PUT /api/collections/{id}/reorder route configured
-- ✅ Updated sqlc queries to include last_edited_by in position updates
-- ✅ Atomic transaction ensures consistency during bulk reorder operations
-
-## Test Environment
-- Server: `just dev` (http://localhost:8080)
-- Test site: `/sites/simple/` with testimonials collection
-- Database: Shows position conflicts (multiple items at position 1)
-
-## Success Criteria ✅
-1. ✅ Collection items maintain order after content edits (Phase 1)
-2. ✅ Drag-and-drop reordering works without page refresh (Phase 2+3)
-3. ✅ Order persists through full enhancement cycles (Phase 1)
-4. ✅ Clean HTML output with proper attributes (Phase 1)
-5. ✅ No JavaScript errors in browser console (Phase 2)
-
-## 🎉 IMPLEMENTATION COMPLETE
-
-All three phases have been successfully implemented:
-
-**Phase 1**: ✅ Backend enhancement injection with unified ID generation
-**Phase 2**: ✅ Frontend API updates with bulk operations and optimistic UI  
-**Phase 3**: ✅ Backend bulk reorder endpoint with atomic transactions
-
-Collection item reordering now works end-to-end with persistence through content edits!
-
-## Notes
-- All test data can be cleared - no backwards compatibility needed
-- Focus on clean implementation over migration
-- HTML-first approach: all attributes come from server enhancement
-- Performance: bulk operations instead of individual API calls

lib/package-lock.json

@@ -311,6 +311,7 @@
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       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "rollup": "dist/bin/rollup"
       },

lib/src/core/editor.js

@@ -79,7 +79,9 @@ export class InsertrEditor {
     
     initializeCollection(meta) {
         const collectionManager = new CollectionManager(meta, this.apiClient, this.auth);
-        collectionManager.initialize();
+        if (collectionManager.collectionId) {
+            collectionManager.initialize();
+        }
     }
     
     addClickHandler(element, meta) {

lib/src/ui/collection-manager.js

@@ -18,9 +18,9 @@ export class CollectionManager {
         this.auth = auth;
         
         // Extract collection ID from container
-        this.collectionId = this.container.getAttribute('data-content-id');
+        this.collectionId = this.container.getAttribute('data-collection-id');
         if (!this.collectionId) {
-            console.error('❌ Collection container missing data-content-id attribute');
+            console.error('❌ Collection container missing data-collection-id attribute');
             return;
         }
         
@@ -331,7 +331,7 @@ export class CollectionManager {
      * Add management controls to an item (remove, reorder)
      */
     addItemControls(itemElement, index) {
-        if (this.itemControls.has(itemElement)) return; // Already has controls
+        if (!this.itemControls || this.itemControls.has(itemElement)) return; // Already has controls or not initialized
         
         const controls = document.createElement('div');
         controls.className = 'insertr-item-controls';