feat: render markdown in place descriptions, notes and reservations

Use react-markdown with remark-gfm for place description/notes
in PlaceInspector and day note subtitles and reservation notes
in DayPlanSidebar. Reuses existing collab-note-md CSS styles.

client/src/components/Planner/DayPlanSidebar.tsx

@@ -12,6 +12,8 @@ import { downloadTripPDF } from '../PDF/TripPDF'
 import { calculateRoute, generateGoogleMapsUrl, optimizeRoute } from '../Map/RouteCalculator'
 import PlaceAvatar from '../shared/PlaceAvatar'
 import { useContextMenu, ContextMenu } from '../shared/ContextMenu'
+import Markdown from 'react-markdown'
+import remarkGfm from 'remark-gfm'
 import WeatherWidget from '../Weather/WeatherWidget'
 import { useToast } from '../shared/Toast'
 import { getCategoryIcon } from '../shared/categoryIcons'
@@ -1331,7 +1333,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                               {note.text}
                             </span>
                             {note.time && (
-                              <div style={{ fontSize: 10.5, fontWeight: 400, color: 'var(--text-faint)', lineHeight: '1.3', marginTop: 2, wordBreak: 'break-word' }}>{note.time}</div>
+                              <div className="collab-note-md" style={{ fontSize: 10.5, fontWeight: 400, color: 'var(--text-faint)', lineHeight: '1.3', marginTop: 2, wordBreak: 'break-word' }}><Markdown remarkPlugins={[remarkGfm]}>{note.time}</Markdown></div>
                             )}
                           </div>
                           {canEditDays && <div className="note-edit-buttons" style={{ display: 'flex', gap: 1, flexShrink: 0, opacity: isNoteHovered ? 1 : 0, transition: 'opacity 0.15s' }}>
@@ -1610,7 +1612,7 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
                   {res.notes && (
                     <div style={{ padding: '8px 10px', background: 'var(--bg-tertiary)', borderRadius: 8 }}>
                       <div style={{ fontSize: 9, fontWeight: 600, color: 'var(--text-faint)', textTransform: 'uppercase', letterSpacing: '0.03em', marginBottom: 3 }}>{t('reservations.notes')}</div>
-                      <div style={{ fontSize: 12, color: 'var(--text-primary)', whiteSpace: 'pre-wrap', wordBreak: 'break-word' }}>{res.notes}</div>
+                      <div className="collab-note-md" style={{ fontSize: 12, color: 'var(--text-primary)', wordBreak: 'break-word' }}><Markdown remarkPlugins={[remarkGfm]}>{res.notes}</Markdown></div>
                     </div>
                   )}
 

client/src/components/Planner/PlaceInspector.tsx

@@ -5,6 +5,8 @@ function authUrl(url: string): string {
   if (!token || !url) return url
   return `${url}${url.includes('?') ? '&' : '?'}token=${token}`
 }
+import Markdown from 'react-markdown'
+import remarkGfm from 'remark-gfm'
 import { X, Clock, MapPin, ExternalLink, Phone, Euro, Edit2, Trash2, Plus, Minus, ChevronDown, ChevronUp, FileText, Upload, File, FileImage, Star, Navigation, Users, Mountain, TrendingUp } from 'lucide-react'
 import PlaceAvatar from '../shared/PlaceAvatar'
 import { mapsApi } from '../../api/client'
@@ -345,10 +347,8 @@ export default function PlaceInspector({
 
           {/* Description / Summary */}
           {(place.description || place.notes || googleDetails?.summary) && (
-            <div style={{ background: 'var(--bg-hover)', borderRadius: 10, overflow: 'hidden' }}>
+            <div className="collab-note-md" style={{ background: 'var(--bg-hover)', borderRadius: 10, overflow: 'hidden', fontSize: 12, color: 'var(--text-muted)', lineHeight: '1.5', padding: '8px 12px' }}>
-              <p style={{ fontSize: 12, color: 'var(--text-muted)', margin: 0, lineHeight: '1.5', padding: '8px 12px' }}>
+              <Markdown remarkPlugins={[remarkGfm]}>{place.description || place.notes || googleDetails?.summary || ''}</Markdown>
-                {place.description || place.notes || googleDetails?.summary}
-              </p>
             </div>
           )}
 
@@ -397,7 +397,7 @@ export default function PlaceInspector({
                           </div>
                         )}
                       </div>
-                      {res.notes && <div style={{ padding: '0 10px 6px', fontSize: 10, color: 'var(--text-faint)', lineHeight: 1.4 }}>{res.notes}</div>}
+                      {res.notes && <div className="collab-note-md" style={{ padding: '0 10px 6px', fontSize: 10, color: 'var(--text-faint)', lineHeight: 1.4 }}><Markdown remarkPlugins={[remarkGfm]}>{res.notes}</Markdown></div>}
                       {(() => {
                         const meta = typeof res.metadata === 'string' ? JSON.parse(res.metadata || '{}') : (res.metadata || {})
                         if (!meta || Object.keys(meta).length === 0) return null