feat: Z-Park branding, data collection fix, buyoff pass (v1.3.0)

Branding:
- Replace all Tianpu text/colors with Z-Park (green #52c41a)
- Update login, sidebar, BigScreen, localStorage keys

Data collection:
- Populate ps_id for all 10 inverters (Phase1: 2226182, Phase2: 2226188)
- Fix docker-compose volume mount for customer config.yaml

Buyoff warning fixes:
- Installed capacity: 2200 kW / 10 Sungrow inverters (was wrong Huawei data)
- Feature flags: hide charging menu when features.charging=false
- Device total count: compute client-side from stats
- Device groups: enrich group names from metadata

Buyoff result: CONDITIONAL PASS (21/21 critical, 54/63 total)
Data accuracy: <3% deviation from iSolarCloud reference

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/pages/Devices/index.tsx

@@ -43,11 +43,21 @@ export default function Devices() {
       Object.entries(query).forEach(([k, v]) => {
         if (v !== undefined && v !== null && v !== '') cleanQuery[k] = v;
       });
-      const res = await getDevices(cleanQuery);
-      setData(res as any);
+      const res = await getDevices(cleanQuery) as any;
+      // Enrich items with type name and group name from cached meta
+      if (res?.items) {
+        const typeMap = new Map(deviceTypes.map((t: any) => [t.code || t.id, t.name]));
+        const groupMap = new Map(deviceGroups.map((g: any) => [g.id, g.name]));
+        res.items = res.items.map((d: any) => ({
+          ...d,
+          device_type_name: d.device_type_name || typeMap.get(d.device_type) || typeMap.get(d.device_type_id) || '-',
+          device_group_name: d.device_group_name || groupMap.get(d.group_id) || '-',
+        }));
+      }
+      setData(res);
     } catch (e) { console.error(e); }
     finally { setLoading(false); }
-  }, [filters]);
+  }, [filters, deviceTypes, deviceGroups]);
 
   const loadMeta = async () => {
     try {
@@ -56,7 +66,9 @@ export default function Devices() {
       ]);
       setDeviceTypes(types as any[]);
       setDeviceGroups(groups as any[]);
-      setStats(st as any);
+      const stData = st as any;
+      stData.total = (stData.online || 0) + (stData.offline || 0) + (stData.alarm || 0) + (stData.maintenance || 0);
+      setStats(stData);
     } catch (e) { console.error(e); }
   };