Merge P4 digital-text viewer

'Digital text' button opens the digital-replica markdown (stem text, parts, marks,
answer-space placeholders, spec refs) in a dialog with download. A 'Marks N/M' chip
surfaces the extraction cover-total reconciliation (green=ok / amber=under-read) from
extraction_meta.audit. examRepository.getDigitalText + DigitalTextResponse type.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/pages/exam/setup/ExamTemplateSetupPage.tsx

@@ -1,7 +1,8 @@
 
 import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import { useNavigate, useParams } from 'react-router-dom'
-import { Alert, Box, Button, Chip, CircularProgress, Collapse, Divider, IconButton, Paper, Snackbar, Stack, Tooltip, Typography, useTheme } from '@mui/material'
+import { Alert, Box, Button, Chip, CircularProgress, Collapse, Dialog, DialogContent, DialogTitle, Divider, IconButton, Paper, Snackbar, Stack, Tooltip, Typography, useTheme } from '@mui/material'
+import DescriptionIcon from '@mui/icons-material/Description'
 import ArrowBackIcon from '@mui/icons-material/ArrowBack'
 import HelpOutlineIcon from '@mui/icons-material/HelpOutline'
 import AutoFixHighIcon from '@mui/icons-material/AutoFixHigh'
@@ -17,7 +18,7 @@ import axios from 'axios'
 import { ErrorBoundary } from '../../../components/ErrorBoundary'
 import { logger } from '../../../debugConfig'
 import { examRepository } from '../../../services/exam/examRepository'
-import type { AutoMapJobStatus, ExamTemplateDetail } from '../../../types/exam.types'
+import type { AutoMapJobStatus, DigitalTextResponse, ExamTemplateDetail } from '../../../types/exam.types'
 import { CanvasPageGeometry, ExamCanvasShapeModel, PAGE_HEIGHT, PAGE_WIDTH, isUuid, newDomainId, serializeCanvasShapes, shapesFromTemplate } from '../../../utils/exam-canvas/model'
 import { PDF_PAGE_SHAPE_TYPE, canvasShapePalette, examCanvasShapeUtils, examCanvasTools, ExamCanvasTLShape, SHAPE_TYPES, isPdfPageShape, shapeTypeToKind } from './examCanvasShapes'
 import { loadPdfPageImages, PdfPageImage } from './pdfLoader'
@@ -224,8 +225,25 @@ const ExamTemplateSetupInner: React.FC = () => {
   const [autoMapStatus, setAutoMapStatus] = useState<AutoMapJobStatus | null>(null)
   const [autoMapBusy, setAutoMapBusy] = useState(false)
   const [liveReview, setLiveReview] = useState({ ai: 0, unconfirmed: 0, lowConfidence: 0 })
+  const [digitalText, setDigitalText] = useState<DigitalTextResponse | null>(null)
+  const [digitalOpen, setDigitalOpen] = useState(false)
+  const [digitalBusy, setDigitalBusy] = useState(false)
   const autoMapPollRef = useRef<number | null>(null)
 
+  const openDigitalText = useCallback(async () => {
+    if (!template) return
+    setDigitalBusy(true); setDigitalOpen(true)
+    try {
+      setDigitalText(await examRepository.getDigitalText(template.id))
+    } catch (e) {
+      setDigitalText(null)
+      setError(e instanceof Error ? e.message : 'No digital text yet — run auto-map first.')
+      setDigitalOpen(false)
+    } finally {
+      setDigitalBusy(false)
+    }
+  }, [template])
+
   const refreshReview = useCallback(() => setLiveReview(reviewFromShapes(editorRef.current)), [])
 
   const applyTemplateToCanvas = useCallback((detail: ExamTemplateDetail) => {
@@ -439,6 +457,11 @@ const ExamTemplateSetupInner: React.FC = () => {
         <Chip size="small" color={review.unconfirmed ? 'warning' : review.ai ? 'info' : 'default'} label={review.ai ? `AI review: ${review.unconfirmed} unconfirmed · ${review.lowConfidence} low conf` : 'Manual template'} />
         <Chip size="small" color={dirty ? 'warning' : 'success'} label={dirty ? 'Unsaved' : 'Saved'} />
         {(autoMapBusy || autoMapStatus) && <Chip size="small" color={autoMapStatus?.status === 'failed' ? 'error' : autoMapStatus?.status === 'completed' ? 'success' : 'info'} label={autoMapStatusLabel(autoMapStatus)} />}
+        {(() => {
+          const a = (template as (ExamTemplateDetail & { extraction_meta?: { audit?: { status?: string; cover_total?: number; detected_total?: number } } }) | null)?.extraction_meta?.audit
+          return a?.status ? <Tooltip title="Extraction cover-total reconciliation (detected vs printed maximum)"><Chip size="small" color={a.status === 'ok' ? 'success' : 'warning'} label={`Marks ${a.detected_total ?? '?'}/${a.cover_total ?? '?'}`} /></Tooltip> : null
+        })()}
+        <Button size="small" variant="outlined" startIcon={digitalBusy ? <CircularProgress size={14} /> : <DescriptionIcon fontSize="small" />} onClick={openDigitalText} disabled={digitalBusy || !template}>Digital text</Button>
         <Button size="small" variant="outlined" startIcon={autoMapBusy ? <CircularProgress size={14} /> : <AutoFixHighIcon fontSize="small" />} onClick={autoMapFromPdf} disabled={autoMapBusy || saving || loading || !template || pdfStatus !== 'ready'}>Auto-map from PDF</Button>
         <Button size="small" variant="contained" startIcon={saving ? <CircularProgress size={14} color="inherit" /> : <SaveIcon fontSize="small" />} onClick={save} disabled={saving || loading || !template}>Save</Button>
       </Paper>
@@ -552,6 +575,32 @@ const ExamTemplateSetupInner: React.FC = () => {
       </Box>
 
       {loading && <Box sx={{ position: 'absolute', inset: 0, display: 'grid', placeItems: 'center', bgcolor: 'rgba(15,23,42,.18)', zIndex: 10 }}><CircularProgress /></Box>}
+      <Dialog open={digitalOpen} onClose={() => setDigitalOpen(false)} maxWidth="md" fullWidth>
+        <DialogTitle sx={{ display: 'flex', alignItems: 'center', gap: 1 }}>
+          <DescriptionIcon fontSize="small" />
+          Digital text
+          {digitalText && <Typography component="span" variant="body2" color="text.secondary">— {digitalText.title} · {digitalText.n_questions}Q · {digitalText.total_marks} marks</Typography>}
+          <Box sx={{ flex: 1 }} />
+          {digitalText && (
+            <Tooltip title="Download markdown">
+              <IconButton size="small" onClick={() => {
+                const blob = new Blob([digitalText.markdown], { type: 'text/markdown' })
+                const url = URL.createObjectURL(blob); const a = document.createElement('a')
+                a.href = url; a.download = `${digitalText.slug}.md`; a.click(); URL.revokeObjectURL(url)
+              }}><SaveIcon fontSize="small" /></IconButton>
+            </Tooltip>
+          )}
+        </DialogTitle>
+        <DialogContent dividers>
+          {digitalBusy ? (
+            <Box sx={{ display: 'flex', justifyContent: 'center', py: 4 }}><CircularProgress /></Box>
+          ) : digitalText ? (
+            <Box component="pre" sx={{ whiteSpace: 'pre-wrap', wordBreak: 'break-word', fontFamily: 'ui-monospace, SFMono-Regular, Menlo, monospace', fontSize: 13, m: 0 }}>{digitalText.markdown}</Box>
+          ) : (
+            <Typography variant="body2" color="text.secondary">No digital text available.</Typography>
+          )}
+        </DialogContent>
+      </Dialog>
       <Snackbar open={!!error} autoHideDuration={8000} onClose={() => setError(null)}><Alert severity="error" onClose={() => setError(null)}>{error}</Alert></Snackbar>
     </Box>
   )

src/services/exam/examRepository.ts

@@ -15,6 +15,7 @@ import type {
   AutoMapResponse,
   BankResponse,
   CorpusResponse,
+  DigitalTextResponse,
   BatchQueueResponse,
   BatchResultsResponse,
   CreateBatchPayload,
@@ -164,6 +165,12 @@ export const examRepository = {
     return res.data.templates ?? [];
   },
 
+  async getDigitalText(templateId: string): Promise<DigitalTextResponse> {
+    const headers = await authHeaders();
+    const res = await axios.get<DigitalTextResponse>(`${EXAM_BASE}/templates/${templateId}/digital-text`, { headers });
+    return res.data;
+  },
+
   async getTemplate(templateId: string): Promise<ExamTemplateDetail> {
     const headers = await authHeaders();
     const res = await axios.get<ExamTemplateDetail>(`${EXAM_BASE}/templates/${templateId}`, { headers });

src/types/exam.types.ts

@@ -396,3 +396,13 @@ export interface CorpusResponse {
   totals: { specs: number; papers: number; sessions: number; QP: number; MS: number; ER: number };
   boards: CorpusBoard[];
 }
+
+// ── Digital-replica markdown (P4) ─────────────────────────────────────────────
+export interface DigitalTextResponse {
+  slug: string;
+  title: string;
+  n_questions: number;
+  total_marks: number;
+  markdown: string;
+  questions: { label: string; marks: number | null; markdown: string }[];
+}