Upgrade TinyMCE to latest and fix broken script path and image upload

[apodacaduron]

Description

Updates TinyMCE to the latest version and fix file upload and import path:

• Changed the location of tinymce.min.js from js/tinymce/js/tinymce/ to js/tinymce/, breaking the editor on all pages. Updated the <script> src in actors, bulletins, incidents, and locations templates.
• The /api/inline/upload endpoint was returning {"data": {"location": "..."}} (standard app response shape), but TinyMCE expects a flat {"location": "..."}. Changed the endpoint to return the flat response directly via jsonify.

How to Test

1. Open any Bulletin, Actor, Incident, or Location — confirm the rich text editor loads correctly.
2. In the rich text editor, click the image button and upload an image file — confirm it inserts into the editor without an "Invalid JSON" error.

IMPORTANT NOTE

The CI retire.js scan will report false positives for CVE-2026-47759, CVE-2026-47762, and CVE-2026-47761 on TinyMCE 8.6.0, which contains the fixes for these CVEs. A correction to the retire.js vulnerability database is pending in RetireJS/retire.js#580.

[coderabbitai]

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch update-tinymce

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