feat(storm-intel): Phase 4+5 — Tomorrow.io forecast overlay and canvasser zone assignment

- Tomorrow.io 7-day forecast strip with weather icons, storm score bar, and per-day risk color coding
- High-risk alert banner in forecast strip when any day scores >=65
- api/storm-forecast.js: Vercel proxy that reads TOMORROW_API_KEY server-side; graceful empty response when key unset
- useStormForecast hook: USE_MOCK=false with realistic MOCK_FORECAST fallback
- ZoneDrawingLayer: click-to-place polygon vertices using react-leaflet useMapEvents; disables double-click zoom while active; shows live vertex dots + dashed preview polygon
- ZoneLayer: renders stormZones as colored semi-transparent polygons with agent initials at centroid
- ZoneAssignmentModal: name + canvasser picker + color selector + optional storm link; portaled modal
- StormIntelPage: Draw Zone button (Admin/Owner only); drawing state/cancel flow; stormZones displayed on map; zone summary strip in sidebar; StormDetailDrawer has working "Draw Canvasser Zone" action
- FieldStormZonePage: canvasser mobile view at /field/storm-zones showing assigned zones with map, linked storm details, conversion window badge, and peak window alert
- Layout: Storm Zones entry in FIELD_AGENT nav
- App: /field/storm-zones route (FIELD_AGENT + Admin + Owner)

src/data/mockStore.jsx

@@ -5080,6 +5080,7 @@ export const MockStoreProvider = ({ children }) => {
     const [templateAccessExcluded, setTemplateAccessExcluded] = useState([]);
     const [kanbanColumns, setKanbanColumns] = useState(KANBAN_COLUMNS_INITIAL);
     const [kanbanLeads, setKanbanLeads] = useState(KANBAN_LEADS_INITIAL);
+    const [stormZones, setStormZones] = useState(INITIAL_STORM_ZONES);
 
     // Commission Settings — Org defaults + per-user overrides
     const [orgCommissionDefaults, setOrgCommissionDefaults] = useState({
@@ -5396,6 +5397,20 @@ export const MockStoreProvider = ({ children }) => {
             removeUserCommissionOverride: (userId) => {
                 setUserCommissionOverrides(prev => prev.filter(o => o.userId !== userId));
             },
+
+            // Storm Zones
+            stormZones,
+            addStormZone: (zone) => {
+                const newZone = { ...zone, id: `sz-${Date.now()}`, createdAt: new Date().toISOString() };
+                setStormZones(prev => [...prev, newZone]);
+                return newZone;
+            },
+            updateStormZone: (id, data) => {
+                setStormZones(prev => prev.map(z => z.id === id ? { ...z, ...data } : z));
+            },
+            deleteStormZone: (id) => {
+                setStormZones(prev => prev.filter(z => z.id !== id));
+            },
             updateProject: (projectId, data) => {
                 setProjects(prev => prev.map(p => p.id === projectId ? { ...p, ...data } : p));
             },
@@ -5705,6 +5720,52 @@ export const MOCK_STORM_EVENTS = [
 // ── Storm-sourced leads — canvasser door-knock results linked to storm events ─
 // Each lead has a stormSource { id, areaName, date, maxHailSize, severity } and
 // a contractValue (number) for Closed leads. createdAt is shortly after storm date.
+// ── Canvasser zones — polygons drawn on Storm Intel map, assigned to agents ───
+export const INITIAL_STORM_ZONES = [
+    {
+        id: 'sz-001',
+        name: 'Spring Creek Zone A',
+        stormId: 'SE-001',
+        polygon: [
+            [33.108, -96.720], [33.100, -96.702], [33.086, -96.702],
+            [33.080, -96.720], [33.086, -96.738], [33.100, -96.738],
+        ],
+        assignedAgentId: 'REP-01',
+        assignedAgentName: 'Carlos Mendez',
+        color: '#F59E0B',
+        status: 'active',
+        createdAt: '2026-04-29T08:00:00Z',
+    },
+    {
+        id: 'sz-002',
+        name: 'Parker Rd Zone B',
+        stormId: 'SE-003',
+        polygon: [
+            [33.033, -96.712], [33.025, -96.697], [33.011, -96.697],
+            [33.003, -96.712], [33.011, -96.727], [33.025, -96.727],
+        ],
+        assignedAgentId: 'REP-02',
+        assignedAgentName: 'Aisha Kumar',
+        color: '#8B5CF6',
+        status: 'active',
+        createdAt: '2026-02-04T09:00:00Z',
+    },
+    {
+        id: 'sz-003',
+        name: 'Haggard Park Zone C',
+        stormId: 'SE-006',
+        polygon: [
+            [33.047, -96.774], [33.039, -96.757], [33.025, -96.757],
+            [33.017, -96.774], [33.025, -96.791], [33.039, -96.791],
+        ],
+        assignedAgentId: 'REP-04',
+        assignedAgentName: 'Nina Patel',
+        color: '#10B981',
+        status: 'completed',
+        createdAt: '2025-11-06T07:30:00Z',
+    },
+];
+
 export const MOCK_STORM_ATTRIBUTION_LEADS = [
     // ── SE-001 · Apr 28 2026 · Severe · NE Plano ──────────────────────────────
     { id: 'SAL-001', firstName: 'John',      lastName: 'Martinez',  address: '4821 Spring Creek Pkwy', city: 'Plano', state: 'TX', urgency: 'high',     leadSource: 'Door Knock', status: 'Contacted', contractValue: null,   createdAt: '2026-04-29T10:14:00Z', stormSource: { id: 'SE-001', areaName: 'NE Plano / Spring Creek Pkwy', date: '2026-04-28', maxHailSize: 2.5, severity: 'severe' } },