feat: full responsive layout — mobile sidebar, stacked panels, fullscreen drawers

- AppShell: permanent sidebar on desktop, temporary drawer + hamburger on mobile (<md)
- TopBar: hamburger icon on mobile, AI-Assistent als Icon-Button auf kleinen Screens
- MatchDetail: Sidebar stacks below content on mobile, key facts wrap, px responsive
- Properties: Drawer fullscreen (100vw) on mobile, 650px on desktop
- ActiveInquiriesTab: mobile shows list → tap opens detail with back button
- LatentInquiriesTab: mobile sequential navigation (list → detail → own properties), tablet 2-col, desktop 3-col
- PublicNeedList: fullWidth prop for mobile layout
- InquiryDetailPanel: property card stacks below chat on mobile

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

src/pages/supply/Properties.tsx

@@ -1,5 +1,5 @@
 import { useState } from 'react'
-import { Box, Drawer } from '@mui/material'
+import { Box, Drawer, useMediaQuery, useTheme } from '@mui/material'
 import { useNavigate } from 'react-router'
 import { PageHeader } from '../../components/layout'
 import { DecisionContextPanel } from '../../components/ui'
@@ -49,6 +49,8 @@ function applyFilters(properties: Property[], filters: PropertyTableFilters): Pr
 
 export default function Properties() {
   const navigate = useNavigate()
+  const theme = useTheme()
+  const isMobile = useMediaQuery(theme.breakpoints.down('md'))
   const [selectedId, setSelectedId] = useState<string | null>(null)
   const [filters, setFilters] = useState<PropertyTableFilters>({})
   const [view, setView] = useState<'list' | 'grid'>(() =>
@@ -155,7 +157,7 @@ export default function Properties() {
         anchor="right"
         open={!!selectedId}
         onClose={() => setSelectedId(null)}
-        slotProps={{ paper: { sx: { width: 650, boxShadow: '-4px 0 24px rgba(0,0,0,0.10)' } } }}
+        slotProps={{ paper: { sx: { width: isMobile ? '100vw' : 650, boxShadow: '-4px 0 24px rgba(0,0,0,0.10)' } } }}
       >
         {selectedId && (
           <PropertyDetailView propertyId={selectedId} onClose={() => setSelectedId(null)} />