Add Tiptap enhancements and webinar date/time fields

- Add text alignment controls to Tiptap editor (left, center, right, justify)
- Add horizontal rule/spacer button to Tiptap toolbar
- Add event_start and duration_minutes fields to webinar products
- Add webinar status badges (Recording Available, Coming Soon, Ended)
- Install @tiptap/extension-text-align package

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

package-lock.json

@@ -45,6 +45,7 @@
         "@tiptap/extension-table-cell": "^3.14.0",
         "@tiptap/extension-table-header": "^3.14.0",
         "@tiptap/extension-table-row": "^3.14.0",
+        "@tiptap/extension-text-align": "^3.14.0",
         "@tiptap/react": "^3.13.0",
         "@tiptap/starter-kit": "^3.13.0",
         "class-variance-authority": "^0.7.1",
@@ -3267,6 +3268,19 @@
         "@tiptap/core": "^3.13.0"
       }
     },
+    "node_modules/@tiptap/extension-text-align": {
+      "version": "3.14.0",
+      "resolved": "https://registry.npmjs.org/@tiptap/extension-text-align/-/extension-text-align-3.14.0.tgz",
+      "integrity": "sha512-CaxxlbAvfofZZ7KPL28Kg8xuMv8t4rvt5GPwZAqE+jd3rwrucpovpX/SdgclYDc75xs0t8qeoxDFe9HQmG5XZA==",
+      "license": "MIT",
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/ueberdosis"
+      },
+      "peerDependencies": {
+        "@tiptap/core": "^3.14.0"
+      }
+    },
     "node_modules/@tiptap/extension-underline": {
       "version": "3.13.0",
       "resolved": "https://registry.npmjs.org/@tiptap/extension-underline/-/extension-underline-3.13.0.tgz",