[Quotes]: Quote edit/detail page (EditRecord)

[nielsdrost7]

Context

QuoteResource currently only has ListQuotes and CreateQuote pages. There is no way to open a specific quote for editing. A dedicated EditRecord page is required to house the quote form and the action bar described in #222 (download PDF, send, convert to invoice, copy, delete).

Quotes are too complex for a slide-over (line items, expiry dates, approval workflow, totals) — a full page matches InvoicePlane v1 behaviour.

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User story

As a user, I want to open a specific quote in a full edit page so I can modify line items, adjust expiry dates, view totals, and trigger quote actions (download, send, convert to invoice, copy, delete) from the top-right header bar.

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Acceptance criteria

• Modules/Quotes/Filament/Company/Resources/Quotes/Pages/EditQuote.php extends EditRecord
• Registered in QuoteResource::getPages() as 'edit' => EditQuote::route('/{record}/edit')
• Quote list row action "Edit" navigates to this page
• The full quote form is rendered on the page (same schema as CreateQuote)
• getHeaderActions() skeleton exists and is ready for [Quotes]: Action dropdown on quote edit screen #222 to populate
• After save, user stays on the edit page (standard Filament EditRecord behaviour)

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Parent of #222 (quote action dropdown).
Child of the Quotes Epic #16.