Add PDF export to Activity Log with date range filtering

- Backend: add date_from/date_to query params to timeline, strikes, and logs endpoints
- Frontend: Export PDF button opens a dialog to select child and date range, generates a printable HTML report in a new tab

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

frontend/src/views/LogView.vue

@@ -4,7 +4,10 @@
     <main class="container">
       <div class="page-header">
         <h1>Activity Log</h1>
-        <button class="btn-sm" @click="showForm = !showForm">+ Add Note</button>
+        <div class="header-actions">
+          <button class="btn-sm btn-export" @click="showExportDialog = true">⬇ Export PDF</button>
+          <button class="btn-sm" @click="showForm = !showForm">+ Add Note</button>
+        </div>
       </div>
 
       <ChildSelector style="margin-bottom: 1.5rem" />
@@ -120,6 +123,37 @@
       <div v-else class="empty-state">No activity recorded yet.</div>
     </main>
   </div>
+
+  <!-- Export Dialog -->
+  <div class="dialog-overlay" v-if="showExportDialog" @click.self="showExportDialog = false">
+    <div class="dialog">
+      <h2>Export Activity Report</h2>
+      <div class="export-fields">
+        <div class="field">
+          <label>Child</label>
+          <select v-model="exportChildId">
+            <option :value="null">All children</option>
+            <option v-for="c in childrenStore.children" :key="c.id" :value="c.id">{{ c.name }}</option>
+          </select>
+        </div>
+        <div class="field">
+          <label>From</label>
+          <input v-model="exportDateFrom" type="date" />
+        </div>
+        <div class="field">
+          <label>To</label>
+          <input v-model="exportDateTo" type="date" />
+        </div>
+      </div>
+      <p v-if="exportError" class="export-error">{{ exportError }}</p>
+      <div class="dialog-actions">
+        <button class="btn-sm" @click="showExportDialog = false">Cancel</button>
+        <button class="btn-primary btn-sm" :disabled="exporting" @click="generatePDF">
+          {{ exporting ? 'Generating…' : 'Generate PDF' }}
+        </button>
+      </div>
+    </div>
+  </div>
 </template>
 
 <script setup>
@@ -296,9 +330,165 @@ async function createLog() {
 }
 
 
+// Export
+const showExportDialog = ref(false)
+const exportChildId = ref(null)
+const exportDateFrom = ref('')
+const exportDateTo = ref('')
+const exporting = ref(false)
+const exportError = ref('')
+
+async function generatePDF() {
+  if (!exportDateFrom.value || !exportDateTo.value) {
+    exportError.value = 'Please select both a from and to date.'
+    return
+  }
+  if (exportDateFrom.value > exportDateTo.value) {
+    exportError.value = '"From" date must be before "To" date.'
+    return
+  }
+  exportError.value = ''
+  exporting.value = true
+
+  try {
+    const params = { date_from: exportDateFrom.value, date_to: exportDateTo.value }
+    if (exportChildId.value) params.child_id = exportChildId.value
+
+    const [tRes, lRes, sRes] = await Promise.all([
+      api.get('/api/logs/timeline', { params }),
+      api.get('/api/logs', { params }),
+      api.get('/api/logs/strikes', { params }),
+    ])
+
+    const events = tRes.data.map(e => ({ ...e, _type: 'event', _key: `event-${e.id}`, child_name: e.child_name }))
+    const notes = lRes.data.map(l => ({ ...l, _type: 'note', _key: `note-${l.id}`, occurred_at: l.log_date + 'T00:00:00', child_name: childrenStore.children.find(c => c.id === l.child_id)?.name || '' }))
+    const strikes = sRes.data.map(s => ({ ...s, _type: 'strike', _key: `strike-${s.id}` }))
+    const all = [...events, ...notes, ...strikes].sort((a, b) => a.occurred_at.localeCompare(b.occurred_at))
+
+    // Group by date ascending
+    const groups = {}
+    for (const entry of all) {
+      const d = entry._type === 'event' ? entry.session_date : entry.log_date
+      if (!groups[d]) groups[d] = []
+      groups[d].push(entry)
+    }
+
+    const childLabel = exportChildId.value
+      ? childrenStore.children.find(c => c.id === exportChildId.value)?.name || 'Unknown'
+      : 'All Children'
+
+    const dateLabel = (str) => {
+      const d = new Date(str + 'T12:00:00')
+      return d.toLocaleDateString([], { weekday: 'long', month: 'long', day: 'numeric', year: 'numeric' })
+    }
+    const fmtFrom = dateLabel(exportDateFrom.value)
+    const fmtTo = dateLabel(exportDateTo.value)
+    const exportedOn = new Date().toLocaleDateString([], { month: 'long', day: 'numeric', year: 'numeric' })
+
+    const rowsHtml = Object.entries(groups).sort(([a], [b]) => a.localeCompare(b)).map(([date, entries]) => {
+      const heading = dateLabel(date)
+      const rows = entries.map(entry => {
+        const time = entry._type !== 'note'
+          ? formatTime(entry.occurred_at, authStore.timezone)
+          : ''
+        const icon = (() => {
+          if (entry._type === 'note') return '📝'
+          if (entry._type === 'strike') return entry.new_strikes > entry.prev_strikes ? '✕' : '↩'
+          if (entry.event_type === 'complete' && !entry.block_label) return '🏁'
+          return EVENT_META[entry.event_type]?.icon || '•'
+        })()
+        const label = (() => {
+          if (entry._type === 'note') return 'Note'
+          if (entry._type === 'strike') return entry.new_strikes > entry.prev_strikes ? `Strike added (${entry.new_strikes}/3)` : `Strike removed (${entry.new_strikes}/3)`
+          if (entry.event_type === 'complete' && !entry.block_label) return 'Day ended'
+          if (entry.event_type === 'complete' && entry.block_label) return `Marked Done — ${entry.block_label}`
+          const action = EVENT_META[entry.event_type]?.label || entry.event_type
+          return entry.block_label ? `${action} — ${entry.block_label}` : action
+        })()
+        const typeClass = entry._type === 'note' ? 'note' : entry._type === 'strike' ? 'strike' : 'event'
+        const dotColor = entry.subject_color || (entry._type === 'note' ? '#6366f1' : entry._type === 'strike' ? '#ef4444' : '#94a3b8')
+        const subjectRow = entry.subject_name ? `<div class="row-subject">${entry.subject_icon || ''} ${entry.subject_name}</div>` : ''
+        const notesRow = entry.notes ? `<div class="row-notes">${entry.notes}</div>` : ''
+        const childRow = childrenStore.children.length > 1 ? `<div class="row-child">${entry.child_name}</div>` : ''
+        return `
+          <div class="event-row ${typeClass}">
+            <div class="event-time">${time}</div>
+            <div class="event-dot" style="background:${dotColor}"></div>
+            <div class="event-body">
+              <div class="event-label"><span class="event-icon">${icon}</span>${label}</div>
+              ${subjectRow}${notesRow}${childRow}
+            </div>
+          </div>`
+      }).join('')
+      return `<div class="day-group"><div class="date-heading">${heading}</div><div class="event-list">${rows}</div></div>`
+    }).join('')
+
+    const html = `<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8" />
+  <title>Activity Report — ${childLabel}</title>
+  <style>
+    * { box-sizing: border-box; margin: 0; padding: 0; }
+    body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color: #1e293b; background: #fff; padding: 1.5rem 2rem; font-size: 13px; }
+    .report-header { border-bottom: 2px solid #4f46e5; padding-bottom: 0.75rem; margin-bottom: 1.25rem; }
+    .report-title { font-size: 1.3rem; font-weight: 700; color: #0f172a; }
+    .report-subtitle { font-size: 0.85rem; color: #475569; margin-top: 0.2rem; }
+    .report-meta { display: flex; gap: 1.5rem; margin-top: 0.5rem; font-size: 0.78rem; color: #64748b; }
+    .meta-item strong { color: #334155; }
+    .day-group { margin-bottom: 1.25rem; }
+    .date-heading { font-size: 1rem; font-weight: 700; color: #0f172a; background: #f1f5f9; border-left: 4px solid #4f46e5; padding: 0.45rem 0.75rem; margin-bottom: 0.6rem; border-radius: 0.25rem; }
+    .event-list { display: flex; flex-direction: column; gap: 0.3rem; }
+    .event-row { display: flex; align-items: flex-start; gap: 0.6rem; padding: 0.5rem 0.6rem; border-radius: 0.4rem; border-left: 3px solid #e2e8f0; background: #f8fafc; }
+    .event-row.note { border-left-color: #6366f1; background: #f5f3ff; }
+    .event-row.strike { border-left-color: #ef4444; background: #fef2f2; }
+    .event-time { font-size: 0.72rem; color: #94a3b8; width: 60px; flex-shrink: 0; padding-top: 0.1rem; font-variant-numeric: tabular-nums; }
+    .event-dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; margin-top: 0.3rem; }
+    .event-body { flex: 1; }
+    .event-label { font-size: 0.85rem; font-weight: 500; color: #1e293b; display: flex; align-items: center; gap: 0.3rem; }
+    .event-icon { font-size: 0.8rem; }
+    .row-subject { font-size: 0.75rem; color: #64748b; margin-top: 0.1rem; }
+    .row-notes { font-size: 0.8rem; color: #475569; margin-top: 0.15rem; font-style: italic; }
+    .row-child { font-size: 0.7rem; color: #94a3b8; margin-top: 0.1rem; }
+    .empty { text-align: center; padding: 3rem; color: #94a3b8; font-size: 0.9rem; }
+    .report-footer { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid #e2e8f0; font-size: 0.72rem; color: #94a3b8; text-align: center; }
+    @media print {
+      body { padding: 1rem 1.5rem; }
+      .event-row { page-break-inside: avoid; }
+    }
+  </style>
+</head>
+<body>
+  <div class="report-header">
+    <div class="report-title">🏠 Homeschool Dashboard</div>
+    <div class="report-subtitle">Activity Report</div>
+    <div class="report-meta">
+      <div class="meta-item"><strong>Child:</strong> ${childLabel}</div>
+      <div class="meta-item"><strong>Period:</strong> ${fmtFrom} – ${fmtTo}</div>
+      <div class="meta-item"><strong>Exported:</strong> ${exportedOn}</div>
+    </div>
+  </div>
+  ${rowsHtml || '<div class="empty">No activity recorded for this period.</div>'}
+  <div class="report-footer">Generated by Homeschool Dashboard</div>
+  <script>window.onload = () => { window.print() }<\/script>
+</body>
+</html>`
+
+    const win = window.open('', '_blank')
+    win.document.write(html)
+    win.document.close()
+    showExportDialog.value = false
+  } finally {
+    exporting.value = false
+  }
+}
+
 onMounted(async () => {
   await childrenStore.fetchChildren()
-  if (childrenStore.activeChild) newLog.value.child_id = childrenStore.activeChild.id
+  if (childrenStore.activeChild) {
+    newLog.value.child_id = childrenStore.activeChild.id
+    exportChildId.value = childrenStore.activeChild.id
+  }
   await loadData()
 })
 
@@ -434,6 +624,30 @@ h1 { font-size: 1.75rem; font-weight: 700; }
 
 .empty-state { text-align: center; padding: 4rem; color: #64748b; }
 
+.header-actions { display: flex; gap: 0.5rem; align-items: center; }
+.btn-export { border-color: #4f46e5; color: #818cf8; }
+.btn-export:hover { background: #1e1b4b; }
+
+.dialog-overlay {
+  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
+  display: flex; align-items: center; justify-content: center; z-index: 100;
+}
+.dialog {
+  background: #1e293b; border: 1px solid #334155; border-radius: 1rem;
+  padding: 2rem; width: 400px; max-width: 90vw; display: flex; flex-direction: column; gap: 1.25rem;
+}
+.dialog h2 { font-size: 1.1rem; font-weight: 700; }
+.export-fields { display: flex; flex-direction: column; gap: 0.75rem; }
+.export-fields .field { margin-bottom: 0; }
+.export-fields .field label { display: block; font-size: 0.8rem; color: #94a3b8; margin-bottom: 0.3rem; }
+.export-fields .field input,
+.export-fields .field select {
+  width: 100%; padding: 0.55rem 0.8rem; background: #0f172a;
+  border: 1px solid #334155; border-radius: 0.5rem; color: #f1f5f9; font-size: 0.875rem;
+}
+.export-error { color: #f87171; font-size: 0.82rem; margin: 0; }
+.dialog-actions { display: flex; gap: 0.75rem; justify-content: flex-end; }
+
 .btn-primary {
   padding: 0.65rem 1.25rem;
   background: #4f46e5;