feat(observability): redesign +error.svelte with errorId display and copy button

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/messages/en.json

@@ -473,7 +473,7 @@
 	"dashboard_reader_stats_persons_short": "Pers.",
 	"dashboard_reader_stats_stories_short": "Stor.",
 	"dashboard_reader_draft_meta": "Draft · last edited {relative}",
-	"dashboard_resume_label": "Last opened:",
+	"dashboard_resume_label": "Continue where you left off",
 	"dashboard_resume_fallback": "Unknown document",
 	"doc_status_placeholder": "Placeholder",
 	"doc_status_uploaded": "Uploaded",
@@ -773,19 +773,15 @@
 	"admin_invite_created_title": "Invite created",
 	"admin_invite_created_desc": "Share this link with the person you are inviting:",
 	"admin_invite_revoke_confirm": "Really revoke this invite?",
-
 	"greeting_morning": "Good morning, {name}.",
 	"greeting_day": "Hello, {name}.",
 	"greeting_evening": "Good evening, {name}.",
-
-	"dashboard_resume_label": "Continue where you left off",
 	"dashboard_blocks": "{count} sections",
 	"dashboard_resume_cta": "Continue transcribing",
 	"dashboard_resume_other": "or choose another document",
 	"dashboard_empty_title": "No document started yet",
 	"dashboard_empty_body": "Choose a document from the archive to start transcribing.",
 	"dashboard_empty_cta": "To the archive",
-
 	"dashboard_mission_caption": "Open tasks",
 	"queue_segment": "Segment",
 	"queue_segment_blurb": "Split pages",
@@ -795,7 +791,6 @@
 	"queue_review_blurb": "Check texts",
 	"queue_n_open": "{n} open",
 	"queue_show_all": "Show all →",
-
 	"pulse_eyebrow": "This week",
 	"pulse_headline": "You have worked on {pages} pages.",
 	"pulse_you": "You personally worked on {pages} of them.",
@@ -803,19 +798,15 @@
 	"pulse_transcribed": "Passages annotated",
 	"pulse_reviewed": "Passages transcribed",
 	"pulse_uploaded": "Documents uploaded",
-
 	"feed_caption": "Comments & activity",
 	"feed_show_all": "Show all",
 	"feed_for_you": "for you",
-
 	"audit_action_text_saved": "saved text in",
 	"audit_action_file_uploaded": "uploaded a file:",
 	"audit_action_annotation_created": "created an annotation in",
 	"audit_action_comment_added": "commented:",
 	"audit_action_mention_created": "mentioned you in",
-
 	"dropzone_release": "Release to upload",
-
 	"chronik_page_title": "Activity",
 	"chronik_for_you_caption": "For you",
 	"chronik_for_you_count": "{count} new",
@@ -859,9 +850,7 @@
 	"pagination_page_of": "Page {page} of {total}",
 	"pagination_nav_label": "Pagination",
 	"pagination_page_button": "Page {page}",
-
 	"common_opens_new_tab": "(opens in new tab)",
-
 	"transcribe_coach_title": "First transcription?",
 	"transcribe_coach_preamble": "Our Kurrent recogniser is still learning. Every transcription you release for training teaches it the handwriting — here's how it works:",
 	"transcribe_coach_step_1_title": "Draw a frame.",
@@ -871,10 +860,8 @@
 	"transcribe_coach_step_3_title": "Saves automatically.",
 	"transcribe_coach_footer_kurrent": "Kurrent help ↗",
 	"transcribe_coach_footer_richtlinien": "Transcription guidelines ↗",
-
 	"transcription_mode_help_label": "Read and edit mode",
 	"transcription_mode_help_body": "Read shows the transcription as flowing text. Edit opens the text fields for each passage.",
-
 	"richtlinien_title": "Transcription Guidelines",
 	"richtlinien_intro": "So every letter is transcribed consistently — no matter who types — here are our rules. The page grows with us: as soon as we agree a new convention, it lands here.",
 	"richtlinien_wiki_text": "The Kurrent and Sütterlin alphabets are well explained on Wikipedia. Here you'll only find our own conventions for this archive.",
@@ -948,12 +935,9 @@
 	"bulk_edit_all_x_failed": "Could not load filter results — please retry.",
 	"bulk_edit_topbar_title": "Bulk edit",
 	"bulk_edit_count_pill": "{count} will be edited",
-
 	"nav_stammbaum": "Family tree",
 	"nav_geschichten": "Stories",
-
 	"error_geschichte_not_found": "The story was not found.",
-
 	"geschichten_index_title": "Stories",
 	"geschichten_new_button": "New story",
 	"geschichten_filter_all_pill": "All",
@@ -973,7 +957,6 @@
 	"geschichten_card_attach_action": "+ Attach a story",
 	"geschichten_card_show_all_for_person": "All stories about {name}",
 	"geschichten_card_show_all": "Show all",
-
 	"geschichte_editor_title_placeholder": "Story title",
 	"geschichte_editor_body_placeholder": "Write your story here…",
 	"geschichte_editor_status_draft": "DRAFT",
@@ -1000,14 +983,11 @@
 	"geschichte_editor_toolbar_h3": "Subheading",
 	"geschichte_editor_toolbar_ul": "Bulleted list",
 	"geschichte_editor_toolbar_ol": "Numbered list",
-
 	"geschichte_delete_confirm_title": "Delete story?",
 	"geschichte_delete_confirm_body": "This action cannot be undone. The story will be permanently deleted and removed from all linked person and document pages.",
-
 	"error_relationship_not_found": "Relationship not found.",
 	"error_circular_relationship": "This relationship would form a cycle.",
 	"error_duplicate_relationship": "This relationship already exists.",
-
 	"relation_parent_of": "Parent of",
 	"relation_child_of": "Child of",
 	"relation_spouse_of": "Spouse",
@@ -1018,7 +998,6 @@
 	"relation_doctor": "Doctor",
 	"relation_neighbor": "Neighbour",
 	"relation_other": "Other",
-
 	"relation_inferred_parent": "Parent",
 	"relation_inferred_child": "Child",
 	"relation_inferred_spouse": "Spouse",
@@ -1036,9 +1015,7 @@
 	"relation_inferred_sibling_inlaw": "Sibling-in-law",
 	"relation_inferred_cousin_1": "Cousin",
 	"relation_inferred_distant": "Distant relative",
-
 	"doc_details_field_relationship": "Relationship",
-
 	"stammbaum_empty_heading": "No family members yet",
 	"stammbaum_empty_body": "Mark a person as a family member on their edit page so they appear here.",
 	"stammbaum_empty_link": "→ Go to person list",
@@ -1050,7 +1027,6 @@
 	"stammbaum_zoom_in": "Zoom in",
 	"stammbaum_zoom_out": "Zoom out",
 	"stammbaum_generations": "Generations",
-
 	"relation_error_duplicate": "This relationship already exists.",
 	"relation_error_circular": "This relationship would form a cycle.",
 	"relation_error_self": "A person cannot be related to themselves.",
@@ -1073,14 +1049,15 @@
 	"relation_form_field_from_year": "From year",
 	"relation_form_field_to_year": "To year",
 	"relation_form_year_placeholder": "e.g. 1920",
-
 	"person_relationships_heading": "Relationships",
 	"person_relationships_empty": "No relationships known yet.",
-
 	"timeline_aria_label": "Document density timeline",
 	"timeline_clear_selection": "Clear selection",
 	"timeline_zoom_reset": "Reset zoom",
 	"timeline_bar_aria_singular": "{when}, 1 document",
 	"timeline_bar_aria_plural": "{when}, {count} documents",
-	"timeline_dragging_aria_live": "Range {from} to {to} selected"
+	"timeline_dragging_aria_live": "Range {from} to {to} selected",
+	"error_page_id_label": "Error ID",
+	"error_copy_id_label": "Copy ID",
+	"error_copied": "Copied!"
 }