Fix publish flow and consolidate My Tools view

- Make publish endpoint idempotent: return success if same content
  already exists instead of VERSION_EXISTS error (fixes retry issues)
- Always refresh tools page after publish dialog closes
- Consolidate My Tools page to group versions by tool name
- Show version count and list instead of separate rows per version
- Sum downloads across all versions for accurate totals

Co-Authored-By: Claude Opus 4.5 <[email protected]>

src/cmdforge/web/templates/dashboard/tools.html

@@ -69,7 +69,14 @@
                 </td>
                 <td class="px-6 py-4 whitespace-nowrap">
                     <span class="text-sm text-gray-900">v{{ tool.version }}</span>
+                    {% if tool.version_count and tool.version_count > 1 %}
+                    <span class="ml-1 text-xs text-gray-500">(+{{ tool.version_count - 1 }} more)</span>
+                    <div class="text-xs text-gray-400 mt-1">
+                        {{ tool.versions[:3]|join(', ') }}{% if tool.version_count > 3 %}...{% endif %}
+                    </div>
+                    {% else %}
                     <p class="text-xs text-gray-500">{{ tool.published_at|timeago }}</p>
+                    {% endif %}
                 </td>
                 <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-900">
                     {{ tool.downloads|format_number }}