_form.html.slim

- submit_label = local_assigns[:submit_text] || (defined?(note) && note&.persisted? ? "Update note" : "Add note")
- form_note = local_assigns[:note] || Note.new(topic: topic, message: message)
- note_error = flash[:note_error]&.with_indifferent_access

- prefill_body = form_note.body
- prefill_tags = form_note.note_tags.map(&:tag).join(", ")
- prefill_mentions = form_note.note_mentions.includes(:mentionable).map { |mention| note_mention_label(mention) }.join(", ")
- if note_error
  - matches_note = note_error[:note_id].present? && form_note.persisted? && form_note.id == note_error[:note_id].to_i
  - matches_new_note = !form_note.persisted? && note_error[:topic_id].to_i == topic.id && note_error[:message_id].to_s == message&.id.to_s
  - if matches_note || matches_new_note
    - prefill_body = note_error[:body]
    - prefill_tags = note_error[:tags_input].to_s
    - prefill_mentions = note_error[:mentions_input].to_s

= form_with model: form_note, url: form_note.persisted? ? note_path(form_note) : notes_path, method: form_note.persisted? ? :patch : :post, data: { turbo: true } do |f|
  = hidden_field_tag "note[topic_id]", topic.id
  = hidden_field_tag "note[message_id]", message&.id
  .note-form-fields
    .note-field
      = f.label :body, "Note"
      = f.text_area :body, rows: 4, placeholder: "Write your note", required: true, class: "note-textarea", value: prefill_body
      - if note_error && prefill_body == note_error[:body]
        .note-error = note_error[:error]
    .note-meta-fields
      .note-field
        = label_tag :note_mentions_input, "Mentions"
        = text_field_tag "note[mentions_input]", prefill_mentions, placeholder: "@alice, @team", class: "note-text-field"
        .note-hint "Notify people or teams. Separate with commas or spaces."
      .note-field
        = label_tag :note_tags_input, "Tags"
        = text_field_tag "note[tags_input]", prefill_tags, placeholder: "release, docs, follow-up", class: "note-text-field"
        .note-hint "Optional tags for filtering. Lowercase letters, numbers, dash, underscore, or dot."
  .note-actions
    = f.submit submit_label, class: "button-secondary"