dayplan toolbar polish + weather archive fallback

- weather: add archive API branch in getWeather for past dates
  (previously returned no_forecast, making the day-strip widget show "—")
- dayplan: add expand/collapse-all toggle between ICS and Undo with
  animated icon swap (ChevronsUpDown <-> ChevronsDownUp)
- dayplan: drop the trip title + date range block from the sidebar header
  (already shown in the page header), toolbar now right-aligned

client/src/components/Planner/DayPlanSidebar.tsx

@@ -4,7 +4,7 @@ declare global { interface Window { __dragData: DragDataPayload | null } }
 
 import React, { useState, useEffect, useRef, useMemo } from 'react'
 import ReactDOM from 'react-dom'
-import { ChevronDown, ChevronRight, ChevronUp, Navigation, RotateCcw, ExternalLink, Clock, Pencil, GripVertical, Ticket, Plus, FileText, Check, Trash2, Info, MapPin, Star, Heart, Camera, Lightbulb, Flag, Bookmark, Train, Bus, Plane, Car, Ship, Coffee, ShoppingBag, AlertTriangle, FileDown, Lock, Hotel, Utensils, Users, Undo2, X, Route as RouteIcon } from 'lucide-react'
+import { ChevronDown, ChevronRight, ChevronUp, ChevronsDownUp, ChevronsUpDown, Navigation, RotateCcw, ExternalLink, Clock, Pencil, GripVertical, Ticket, Plus, FileText, Check, Trash2, Info, MapPin, Star, Heart, Camera, Lightbulb, Flag, Bookmark, Train, Bus, Plane, Car, Ship, Coffee, ShoppingBag, AlertTriangle, FileDown, Lock, Hotel, Utensils, Users, Undo2, X, Route as RouteIcon } from 'lucide-react'
 
 const RES_ICONS = { flight: Plane, hotel: Hotel, restaurant: Utensils, train: Train, car: Car, cruise: Ship, event: Ticket, tour: Users, other: FileText }
 import { assignmentsApi, reservationsApi } from '../../api/client'
@@ -940,18 +940,9 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
 
   return (
     <div style={{ display: 'flex', flexDirection: 'column', height: '100%', position: 'relative', fontFamily: "-apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif" }}>
-      {/* Reise-Titel */}
-      <div style={{ padding: '16px 16px 12px', borderBottom: '1px solid var(--border-faint)', flexShrink: 0 }}>
-        <div style={{ display: 'flex', alignItems: 'flex-start', justifyContent: 'space-between', gap: 8 }}>
-          <div style={{ flex: 1, minWidth: 0 }}>
-            <div style={{ fontWeight: 600, fontSize: 14, color: 'var(--text-primary)', lineHeight: '1.3' }}>{trip?.title}</div>
-            {(trip?.start_date || trip?.end_date) && (
-              <div style={{ fontSize: 11, color: 'var(--text-faint)', marginTop: 3 }}>
-                {[trip.start_date, trip.end_date].filter(Boolean).map(d => new Date(d + 'T00:00:00Z').toLocaleDateString(locale, { day: 'numeric', month: 'short', timeZone: 'UTC' })).join(' – ')}
-                {days.length > 0 && ` · ${days.length} ${t('dayplan.days')}`}
-              </div>
-            )}
-          </div>
+      {/* Toolbar */}
+      <div style={{ padding: '12px 16px', borderBottom: '1px solid var(--border-faint)', flexShrink: 0 }}>
+        <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'flex-end', gap: 8 }}>
           <div style={{ position: 'relative', flexShrink: 0 }}>
             <button
               onClick={async () => {
@@ -1033,6 +1024,51 @@ const DayPlanSidebar = React.memo(function DayPlanSidebar({
               </div>
             )}
           </div>
+          {(() => {
+            const allExpanded = days.length > 0 && days.every(d => expandedDays.has(d.id))
+            const label = allExpanded ? t('dayplan.collapseAll') : t('dayplan.expandAll')
+            return (
+              <Tooltip label={label} placement="bottom">
+                <button
+                  onClick={() => {
+                    const next = allExpanded ? new Set() : new Set(days.map(d => d.id))
+                    setExpandedDays(next)
+                    try { sessionStorage.setItem(`day-expanded-${tripId}`, JSON.stringify([...next])) } catch {}
+                  }}
+                  aria-label={label}
+                  aria-pressed={allExpanded}
+                  style={{
+                    position: 'relative', flexShrink: 0,
+                    display: 'flex', alignItems: 'center', justifyContent: 'center',
+                    width: 30, height: 30, borderRadius: 8,
+                    border: '1px solid var(--border-primary)', background: 'none',
+                    color: 'var(--text-primary)', cursor: 'pointer', fontFamily: 'inherit', padding: 0,
+                    transition: 'color 0.15s, border-color 0.15s, background 0.15s',
+                    overflow: 'hidden',
+                  }}
+                  onMouseEnter={e => { e.currentTarget.style.background = 'var(--bg-hover)' }}
+                  onMouseLeave={e => { e.currentTarget.style.background = 'transparent' }}
+                >
+                  <span style={{
+                    position: 'absolute', inset: 0, display: 'flex', alignItems: 'center', justifyContent: 'center',
+                    transition: 'opacity 0.2s ease, transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1)',
+                    opacity: allExpanded ? 0 : 1,
+                    transform: allExpanded ? 'translateY(-8px) scale(0.6)' : 'translateY(0) scale(1)',
+                  }}>
+                    <ChevronsUpDown size={14} strokeWidth={2} />
+                  </span>
+                  <span style={{
+                    position: 'absolute', inset: 0, display: 'flex', alignItems: 'center', justifyContent: 'center',
+                    transition: 'opacity 0.2s ease, transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1)',
+                    opacity: allExpanded ? 1 : 0,
+                    transform: allExpanded ? 'translateY(0) scale(1)' : 'translateY(8px) scale(0.6)',
+                  }}>
+                    <ChevronsDownUp size={14} strokeWidth={2} />
+                  </span>
+                </button>
+              </Tooltip>
+            )
+          })()}
           {onUndo && (
             <div style={{ position: 'relative', flexShrink: 0 }}>
               <button

client/src/i18n/translations/de.ts

@@ -908,6 +908,8 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'dayplan.cannotDropOnTimed': 'Orte können nicht zwischen zeitgebundene Einträge geschoben werden',
   'dayplan.cannotBreakChronology': 'Die zeitliche Reihenfolge von Uhrzeiten und Buchungen darf nicht verletzt werden',
   'dayplan.addNote': 'Notiz hinzufügen',
+  'dayplan.expandAll': 'Alle Tage ausklappen',
+  'dayplan.collapseAll': 'Alle Tage einklappen',
   'dayplan.editNote': 'Notiz bearbeiten',
   'dayplan.noteAdd': 'Notiz hinzufügen',
   'dayplan.noteEdit': 'Notiz bearbeiten',

client/src/i18n/translations/en.ts

@@ -965,6 +965,8 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'dayplan.cannotDropOnTimed': 'Items cannot be placed between time-bound entries',
   'dayplan.cannotBreakChronology': 'This would break the chronological order of timed items and bookings',
   'dayplan.addNote': 'Add Note',
+  'dayplan.expandAll': 'Expand all days',
+  'dayplan.collapseAll': 'Collapse all days',
   'dayplan.editNote': 'Edit Note',
   'dayplan.noteAdd': 'Add Note',
   'dayplan.noteEdit': 'Edit Note',