Add "Copy as Markdown" button to support ticket message

[simonhamp]

What

Adds a Copy as Markdown button beside the Message label on the admin support ticket view (SupportTicketResource → Context section).

Clicking it copies the ticket's initial message to the clipboard as Markdown, converting any ASCII tables it contains into real Markdown tables.

Why

Support tickets submitted for Mobile/Desktop are auto-composed as Markdown, and the Environment: section usually contains an ASCII table pasted from native:doctor:

+--------------------+---------+
| Package Version    | 3.3.3   |
| PHP Version (Host) | 8.4.16  |
+--------------------+---------+

Copying that straight out of the admin panel gives you either rendered HTML or an ASCII blob. This gives one click to get something that renders properly when pasted into a GitHub issue or handed to an LLM.

How

• New SupportTicketResource::ticketMessageAsMarkdown() does the conversion. The rest of the message passes through untouched, since it's already Markdown.
• The existing ASCII-table walker was generalised into convertAsciiTables($message, $renderTable), with row parsing extracted to parseAsciiTable(), so the HTML and Markdown renderers share one parser. HTML output is byte-identical — the existing rendering tests pass unchanged.
• Tables with a +---+ separator after row 1 keep that row as the Markdown header. Key/value tables without one get an empty header row, since Markdown requires a delimiter row to be a table at all. Ragged rows are padded to the widest row.
• The button is a Filament hintAction using actionJs(), so the copy is entirely client-side — no round-trip. Confirms with a $tooltip('Copied as Markdown'), mirroring Filament's own copy behaviour. Hidden when the message is empty.

Security

The message is embedded in the click handler via Js::from() — the same mechanism Filament's built-in copyable() uses. It hex-escapes quotes, angle brackets and ampersands, so user-submitted content can't break out of the attribute.

Notes

• Like Filament's built-in copy feature, navigator.clipboard requires a secure context (HTTPS).
• Scoped to the admin panel only. The customer-facing ticket page also shows the original message for non-mobile/desktop tickets; left alone, as this is aimed at triaging tickets out to an issue tracker.

Tests

7 new tests in tests/Feature/SupportTicketTest.php:

• conversion: plain Markdown untouched, headerless table, header table, ragged rows, non-table + lines left alone
• page: button renders with the correct clipboard payload; hidden when there's no message

php artisan test tests/Feature/SupportTicketTest.php → 95 passed (302 assertions). Pint clean.

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