fix(calendar): all-day off-by-one (exclusive DTEND) + member color too close to shared rose

All-day: a single-day all-day event displayed across two days. iCal all-day
DTEND is EXCLUSIVE (1-day event = DTSTART:24/DTEND:25) and the server occurrence
carries that exclusive end, but Schedule-X treats all-day end as INCLUSIVE.
hydrateEvents now subtracts one day (clamped to >= start) so a 1-day event shows
on one day and an N-day event spans N days. Write path was already correct
(verified against stored VEVENTs). +regression test.

Color: a member's coral (#E8734A) was mistaken for the shared-family rose
(#F25C7A). Reorder COLOR_PALETTE so warm near-rose hues (amber, coral) are
assigned LAST; early members get cool, clearly-distinct colors (blue/green/teal).

apps/api/src/auth/user.ts

@@ -13,17 +13,22 @@ import { db } from '../db/client.js'
 import { users } from '../db/schema.js'
 
 /**
- * Accessible, visually-distinct palette for per-member color assignment.
- * Assigned round-robin by join order (COUNT of existing users at insert time).
+ * Accessible, visually-distinct palette for per-member member-color assignment.
+ * A new member is given the first entry not already in use (see upsertUser).
+ *
+ * Ordering matters: the SHARED-family calendar is reserved rose (#F25C7A, D-06),
+ * so the warm near-rose hues (coral, amber) are placed LAST. Early members get
+ * cool colors (blue, green, teal) that read clearly distinct from the shared
+ * lane — otherwise a member's coral was mistaken for the shared rose.
  * Values are Claude's choice per D-06.
  */
 export const COLOR_PALETTE: string[] = [
   '#4A90D9', // calm blue
-  '#E8734A', // warm coral
   '#5BA85A', // forest green
-  '#9B6DC5', // soft purple
-  '#E8A840', // warm amber
   '#3AAFA9', // teal
+  '#9B6DC5', // soft purple
+  '#E8A840', // warm amber  (near shared rose — assigned only after cool colors)
+  '#E8734A', // warm coral  (closest to shared rose — assigned last)
 ]
 
 /** Coerce an OIDC claim to a trimmed non-empty string, else undefined. */

apps/pwa/src/lib/hydrateEvents.test.ts

@@ -76,6 +76,23 @@ describe('hydrateEvents — RED stubs (Wave 0)', () => {
       expect(evt.end).toBeInstanceOf(Temporal.PlainDate)
     })
 
+    it('converts an all-day exclusive DTEND to an inclusive last day for Schedule-X', () => {
+      // Single-day event: iCal DTSTART:24 / DTEND:25 (exclusive). Schedule-X end is
+      // inclusive, so a 1-day event must have start === end (renders on one day only).
+      const single = hydrateEvents([
+        makeOccurrence({ allDay: true, start: '2026-06-24', end: '2026-06-25' }),
+      ])[0]
+      expect((single.start as Temporal.PlainDate).toString()).toBe('2026-06-24')
+      expect((single.end as Temporal.PlainDate).toString()).toBe('2026-06-24')
+
+      // Two-day event: DTSTART:26 / DTEND:28 (exclusive) → inclusive last day = 27.
+      const multi = hydrateEvents([
+        makeOccurrence({ allDay: true, start: '2026-06-26', end: '2026-06-28' }),
+      ])[0]
+      expect((multi.start as Temporal.PlainDate).toString()).toBe('2026-06-26')
+      expect((multi.end as Temporal.PlainDate).toString()).toBe('2026-06-27')
+    })
+
     it('converts timed occurrence (allDay:false) to Temporal.ZonedDateTime for start and end', () => {
       const occurrences = [
         makeOccurrence({

apps/pwa/src/lib/hydrateEvents.ts

@@ -76,11 +76,24 @@ export function hydrateEvents(occurrences: CalendarOccurrence[]): ScheduleXEvent
     if (occ.allDay) {
       // All-day: use Temporal.PlainDate — do NOT construct ZonedDateTime from
       // midnight UTC. occ.start and occ.end are 'YYYY-MM-DD' strings.
+      //
+      // Exclusive→inclusive end conversion: iCalendar all-day DTEND is EXCLUSIVE
+      // (a single-day event on the 24th is DTSTART:24 / DTEND:25), and the server
+      // occurrence carries that exclusive end. Schedule-X treats an all-day event's
+      // `end` as INCLUSIVE (the last day it covers), so passing the exclusive DTEND
+      // straight through renders every all-day event one day too long (a 1-day event
+      // showed across two days). Subtract one day to get the inclusive last day,
+      // clamped to never precede start.
+      const startPd = Temporal.PlainDate.from(occ.start)
+      const endExclusive = Temporal.PlainDate.from(occ.end)
+      const endInclusive = endExclusive.subtract({ days: 1 })
+      const end =
+        Temporal.PlainDate.compare(endInclusive, startPd) < 0 ? startPd : endInclusive
       return {
         id: occ.id,
         title: occ.title,
-        start: Temporal.PlainDate.from(occ.start),
-        end: Temporal.PlainDate.from(occ.end),
+        start: startPd,
+        end,
         calendarId,
         _familySync: {
           uid: occ.uid,