Move cell/range toggle near arrows, add period picker on date button

- Replaced static "Сегодня" button with a dropdown picker (▾) showing
  current start date and visible days count
- Picker lets user choose any start date + days count (14/30/45/60д)
- "Сегодня" quick-reset inside picker + "Показать" confirms navigation
- Arrows now step by visibleDays instead of fixed 14
- Moved By-cell / By-range toggle into the left nav group (next to arrows)

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

src/pages/AvailabilityPage.tsx

@@ -1,9 +1,9 @@
-import { useState, useRef, useCallback, useMemo } from 'react'
+import { useState, useRef, useCallback, useMemo, useEffect } from 'react'
 import { addDays, format, parseISO, isWithinInterval, startOfDay, getDay, isSameDay } from 'date-fns'
 import { ru } from 'date-fns/locale'
 import {
   ChevronLeft, ChevronRight, X, Check, CalendarDays,
-  Plus, Pencil, Trash2, AlertCircle, RefreshCw, MousePointer2, Rows3,
+  Plus, Pencil, Trash2, AlertCircle, RefreshCw, MousePointer2, Rows3, ChevronDown,
 } from 'lucide-react'
 import { cn } from '../lib/utils'
 import {
@@ -640,11 +640,26 @@ export function AvailabilityPage() {
   const [periodModal, setPeriodModal] = useState<RatePeriod | null | 'new'>(null)
   const [cellEditMode, setCellEditMode] = useState(false)
   const [selectedCat, setSelectedCat] = useState<string | null>(null)
+  const [visibleDays, setVisibleDays] = useState(45)
+  const [showNavPicker, setShowNavPicker] = useState(false)
+  const [pickerDate, setPickerDate] = useState(format(new Date(), DATE_FMT))
+  const navPickerRef = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    if (!showNavPicker) return
+    const handler = (e: MouseEvent) => {
+      if (navPickerRef.current && !navPickerRef.current.contains(e.target as Node)) {
+        setShowNavPicker(false)
+      }
+    }
+    document.addEventListener('mousedown', handler)
+    return () => document.removeEventListener('mousedown', handler)
+  }, [showNavPicker])
 
   const dates = useMemo(() =>
-    Array.from({ length: DAYS }, (_, i) =>
+    Array.from({ length: visibleDays }, (_, i) =>
       format(addDays(today, offset + i), DATE_FMT),
-    ), [today, offset])
+    ), [today, offset, visibleDays])
 
   // ── Mouse handlers ──
   const handleCellDown = (date: string, catId: string) => {
@@ -741,6 +756,7 @@ export function AvailabilityPage() {
       {/* ── Top bar ── */}
       <div className="shrink-0 px-5 py-3 bg-white dark:bg-slate-800 border-b border-slate-200 dark:border-slate-700 flex items-center justify-between gap-4 flex-wrap">
         <div className="flex items-center gap-3">
+          {/* Tabs */}
           <div className="flex bg-slate-100 dark:bg-slate-700 rounded-lg p-0.5">
             {([['grid', 'Сетка цен'], ['periods', 'Периоды']] as const).map(([t, label]) => (
               <button
@@ -760,18 +776,114 @@ export function AvailabilityPage() {
 
           {tab === 'grid' && (
             <div className="flex items-center gap-1">
-              <button onClick={() => setOffset(o => o - 14)} className="btn-ghost p-1.5">
+              <button onClick={() => setOffset(o => o - visibleDays)} className="btn-ghost p-1.5">
                 <ChevronLeft size={16} />
               </button>
-              <button
+
-                onClick={() => setOffset(0)}
+              {/* Date/period picker trigger */}
-                className={cn('btn-ghost text-xs px-2 py-1', offset === 0 && 'text-brand-600 font-semibold')}
+              <div className="relative" ref={navPickerRef}>
-              >
+                <button
-                Сегодня
+                  onClick={() => setShowNavPicker(v => !v)}
-              </button>
+                  className={cn(
-              <button onClick={() => setOffset(o => o + 14)} className="btn-ghost p-1.5">
+                    'btn-ghost flex items-center gap-1 text-xs px-2.5 py-1.5 rounded-lg',
+                    showNavPicker && 'bg-slate-100 dark:bg-slate-700',
+                  )}
+                >
+                  <CalendarDays size={13} className={offset === 0 ? 'text-brand-600' : 'text-slate-400'} />
+                  <span className={cn('font-medium', offset === 0 ? 'text-brand-600' : 'text-slate-600 dark:text-slate-300')}>
+                    {offset === 0
+                      ? 'Сегодня'
+                      : format(addDays(today, offset), 'd MMM', { locale: ru })}
+                  </span>
+                  <span className="text-slate-400">·</span>
+                  <span className="text-slate-400">{visibleDays}д</span>
+                  <ChevronDown size={12} className="text-slate-400" />
+                </button>
+
+                {showNavPicker && (
+                  <div className="absolute top-full left-0 mt-1 z-50 bg-white dark:bg-slate-800 rounded-xl border border-slate-200 dark:border-slate-700 shadow-lg p-4 w-64">
+                    {/* Start date */}
+                    <p className="text-xs font-semibold text-slate-500 uppercase tracking-wide mb-2">
+                      Начало периода
+                    </p>
+                    <div className="flex gap-2 mb-3">
+                      <input
+                        type="date"
+                        value={pickerDate}
+                        onChange={e => setPickerDate(e.target.value)}
+                        className="input text-sm py-1.5 flex-1"
+                      />
+                      <button
+                        onClick={() => {
+                          setPickerDate(format(today, DATE_FMT))
+                          setOffset(0)
+                        }}
+                        className="btn-secondary text-xs px-2.5 py-1.5 shrink-0"
+                      >
+                        Сегодня
+                      </button>
+                    </div>
+
+                    {/* Days count */}
+                    <p className="text-xs font-semibold text-slate-500 uppercase tracking-wide mb-2">
+                      Количество дней
+                    </p>
+                    <div className="flex gap-1.5 flex-wrap mb-4">
+                      {[14, 30, 45, 60].map(d => (
+                        <button
+                          key={d}
+                          onClick={() => setVisibleDays(d)}
+                          className={cn(
+                            'px-3 py-1 rounded-lg text-xs font-medium border transition-colors',
+                            visibleDays === d
+                              ? 'bg-brand-600 border-brand-600 text-white'
+                              : 'bg-white dark:bg-slate-700 border-slate-200 dark:border-slate-600 text-slate-600 dark:text-slate-300 hover:border-brand-400',
+                          )}
+                        >
+                          {d}д
+                        </button>
+                      ))}
+                    </div>
+
+                    <button
+                      onClick={() => {
+                        const diff = Math.round(
+                          (parseISO(pickerDate).getTime() - startOfDay(today).getTime()) / 86400000
+                        )
+                        setOffset(diff)
+                        setShowNavPicker(false)
+                      }}
+                      className="btn-primary w-full justify-center text-sm py-1.5"
+                    >
+                      Показать
+                    </button>
+                  </div>
+                )}
+              </div>
+
+              <button onClick={() => setOffset(o => o + visibleDays)} className="btn-ghost p-1.5">
                 <ChevronRight size={16} />
               </button>
+
+              {/* Cell / range mode toggle */}
+              <button
+                onClick={() => {
+                  setCellEditMode(v => !v)
+                  setSelectedCat(null)
+                  setSelection(null)
+                  setShowEditPanel(false)
+                }}
+                title={cellEditMode ? 'Режим ячейки: редактирует только выбранную категорию' : 'Режим диапазона: редактирует все категории'}
+                className={cn(
+                  'flex items-center gap-1.5 px-2.5 py-1.5 rounded-lg text-xs font-medium transition-colors border',
+                  cellEditMode
+                    ? 'bg-brand-50 dark:bg-brand-900/30 border-brand-300 dark:border-brand-700 text-brand-700 dark:text-brand-300'
+                    : 'bg-white dark:bg-slate-800 border-slate-200 dark:border-slate-700 text-slate-500 hover:text-slate-700 dark:hover:text-slate-300',
+                )}
+              >
+                {cellEditMode ? <MousePointer2 size={13} /> : <Rows3 size={13} />}
+                {cellEditMode ? 'По ячейке' : 'По диапазону'}
+              </button>
             </div>
           )}
         </div>
@@ -798,27 +910,6 @@ export function AvailabilityPage() {
             </div>
           )}
 
-          {tab === 'grid' && (
-            <button
-              onClick={() => {
-                setCellEditMode(v => !v)
-                setSelectedCat(null)
-                setSelection(null)
-                setShowEditPanel(false)
-              }}
-              title={cellEditMode ? 'Режим ячейки включён — редактирует только выбранную категорию' : 'Режим диапазона — редактирует все категории'}
-              className={cn(
-                'flex items-center gap-1.5 px-3 py-1.5 rounded-lg text-xs font-medium transition-colors border',
-                cellEditMode
-                  ? 'bg-brand-50 dark:bg-brand-900/30 border-brand-300 dark:border-brand-700 text-brand-700 dark:text-brand-300'
-                  : 'bg-white dark:bg-slate-800 border-slate-200 dark:border-slate-700 text-slate-500 hover:text-slate-700 dark:hover:text-slate-300',
-              )}
-            >
-              {cellEditMode ? <MousePointer2 size={13} /> : <Rows3 size={13} />}
-              {cellEditMode ? 'По ячейке' : 'По диапазону'}
-            </button>
-          )}
-
           {tab === 'periods' && (
             <button
               onClick={() => setPeriodModal('new')}