Bulk transcript export, certificate fix, and automation sender names

🎬 Media and courses

• New Export transcripts in bulk. Media Library → Transcripts → Export: tick a course, a module or single lessons and download one Markdown file with all selected transcripts under course/module/lesson headings.
• Fixed Certificate templates render fully. Templates from the simple designer showed blank headings, labels, logo and signature in previews and issued PDFs; they render again. Templates saved earlier need one re-save in the editor.
• Improved Audio files in file products. The "Add files" picker on a downloads product now offers audio files.

⚙️ Automations and checkout

• Fixed Automation emails from your name. Workflow emails with no sender name set now go out from your platform name with your contact email as Reply-To, instead of "Zanfia".
• Fixed Free signups without a payment provider. Free checkouts work on workspaces that never connected a payment provider.
• Fixed Expired promo prices are not auto-selected. A checkout whose price has a lapsed time limit no longer pre-selects it, so buyers are not offered a price that cannot be paid.
• Fixed Form embeds in your language. Standalone form embeds render system texts (button, consents) in the workspace language instead of English.
• Fixed Save buttons that stayed disabled. The Site → privacy documents page keeps your edits and its Save button active while other saves happen, and picking a palette swatch in the checkout Theme tab enables Save.
• Fixed Presets on product and thank-you pages. Public product pages and thank-you pages honor checkout theme presets, not only per-checkout overrides.

🏘️ Community

• Fixed Admin count. The "Admins" chip and stat in the customer area count only roles with real management or moderation permissions; label-only custom roles no longer count.
• Fixed Deleted communities disappear from lists. A deleted community is no longer listed in the customer area or the mobile app.

🤖 Assistant and mobile

• Improved Undo assistant edits. Say "undo that change" after the assistant edits a lesson, article, product, offer or post and it restores the previous values exactly. Follow-up questions in the same thread are also faster.
• Mobile Knowledge-base articles refresh. Returning to the app after it was in the background reloads stale articles automatically.