Add multi-day entries and area stay blocks

Entries gain an optional inclusive end_date (backfilled via migration): flights and travel longer than 24h show a continuation marker on following days, and a new stay entry type marks a time frame in one area (e.g. 3 days Venice) rendered as continuous bands across the calendar weeks. Stays feed the map route as stops; the route summary gains stays count and a chronological areas list with day spans. 49 API tests.

src/server/routes/entries.js

@@ -12,6 +12,7 @@ const ENTRY_TYPES = new Set([
   'hotel',
   'activity',
   'rental',
+  'stay',
   'note',
 ]);
 const SPLIT_MODES = new Set(['equal', 'own', 'payer']);
@@ -44,6 +45,25 @@ function validateEntry(body, { partial, existing, memberIds }) {
     }
     fields.date = body.date;
   }
+  // end_date: optional inclusive end, null clears, must be >= the (effective) date.
+  // ISO YYYY-MM-DD strings compare correctly lexicographically.
+  const effDate = 'date' in fields ? fields.date : existing?.date;
+  if (has('end_date')) {
+    if (body.end_date === null) {
+      fields.end_date = null;
+    } else {
+      if (!isValidDateStr(body.end_date)) {
+        return { error: 'end_date must be a valid YYYY-MM-DD date' };
+      }
+      if (effDate && body.end_date < effDate) {
+        return { error: 'end_date must be on or after date' };
+      }
+      fields.end_date = body.end_date;
+    }
+  } else if (partial && 'date' in fields && existing?.end_date && existing.end_date < fields.date) {
+    // Moving date past a stored end_date would invert the range.
+    return { error: 'end_date would be before the new date; clear or update end_date' };
+  }
   if (!partial || has('title')) {
     if (typeof body.title !== 'string' || body.title.trim() === '') {
       return { error: 'title is required' };
@@ -190,7 +210,7 @@ export default function entriesRoutes(db) {
     `SELECT ${ENTRY_COLUMNS} FROM entries WHERE trip_id = ? ORDER BY date, sort_order, id`
   );
   const getEntryRow = db.prepare(
-    'SELECT trip_id, split_mode, paid_by, type FROM entries WHERE id = ?'
+    'SELECT trip_id, split_mode, paid_by, type, date, end_date FROM entries WHERE id = ?'
   );
   const getMemberIds = db.prepare('SELECT user_id FROM trip_members WHERE trip_id = ?');
   const insertParticipant = db.prepare(
@@ -235,13 +255,14 @@ export default function entriesRoutes(db) {
       const info = db
         .prepare(
           `INSERT INTO entries
-             (trip_id, date, type, title, details, start_time, end_time,
+             (trip_id, date, end_date, type, title, details, start_time, end_time,
               location_name, lat, lng, sort_order, price, paid_by, split_mode, segments, rental)
-           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`
+           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`
         )
         .run(
           tripId,
           f.date,
+          f.end_date ?? null,
           f.type,
           f.title,
           f.details ?? '',