feat: add source-grounded evolution and Ollama assistant

frontend/src/App.tsx

@@ -2,7 +2,9 @@ import { useEffect, useMemo, useState } from 'react'
 import './styles/app.css'
 import './styles/premium.css'
 import { ChangeDetectionPanel } from './components/analysis/ChangeDetectionPanel'
+import { GeoAssistantPanel } from './components/assistant/GeoAssistantPanel'
 import { DatasetPanel } from './components/datasets/DatasetPanel'
+import { SourceCatalogPanel } from './components/datasets/SourceCatalogPanel'
 import { DetectionLab } from './components/detection/DetectionLab'
 import { ExportCenter } from './components/exports/ExportCenter'
 import { ExportPreview } from './components/exports/ExportPreview'
@@ -38,12 +40,13 @@ function isVectorDatasetType(datasetType: string): boolean {
   return datasetType === 'vector' || datasetType === 'geojson'
 }
 
-type WorkspaceKey = 'overview' | 'data' | 'map' | 'analysis' | 'ai' | 'exports' | 'system'
+type WorkspaceKey = 'overview' | 'data' | 'map' | 'assistant' | 'analysis' | 'ai' | 'exports' | 'system'
 
 const workspaceNavItems: Array<{ key: WorkspaceKey; label: string; description: string }> = [
   { key: 'overview', label: 'Status', description: 'Beschikbaarheid en aandachtspunten' },
   { key: 'data', label: 'Bronnen', description: 'Gebieden en ingeladen gegevens' },
   { key: 'map', label: 'Kaart', description: 'Selecteren, uitlezen en vergelijken' },
+  { key: 'assistant', label: 'AI-vragen', description: 'Vraag de lokale assistent over het actieve gebied' },
   { key: 'analysis', label: 'Kwaliteit', description: 'Resultaten controleren' },
   { key: 'ai', label: 'Beeldanalyse', description: 'Gebouwen herkennen op luchtbeelden' },
   { key: 'exports', label: 'Downloads', description: 'Resultaten bewaren en delen' },
@@ -52,6 +55,7 @@ const workspaceNavItems: Array<{ key: WorkspaceKey; label: string; description:
 
 const workspaceNavGroups: Array<{ label: string; keys: WorkspaceKey[] }> = [
   { label: 'Verkennen', keys: ['map', 'data'] },
+  { label: 'Vragen', keys: ['assistant'] },
   { label: 'Analyseren', keys: ['analysis', 'ai'] },
   { label: 'Afronden', keys: ['exports'] },
   { label: 'Beheer', keys: ['overview', 'system'] },
@@ -918,6 +922,7 @@ function App(): JSX.Element {
 
           {activeWorkspace === 'data' ? (
             <div className="workspace-grid workspace-grid-data">
+              <SourceCatalogPanel datasets={datasets} />
               <ProjectPanel
                 projects={projects}
                 selectedProjectId={selectedProjectId}
@@ -1075,6 +1080,17 @@ function App(): JSX.Element {
             </div>
           ) : null}
 
+          {activeWorkspace === 'assistant' ? (
+            <div className="workspace-grid workspace-grid-assistant">
+              <GeoAssistantPanel
+                selectedProjectId={selectedProjectId}
+                selectedAreaId={mapSelectionResult?.selection_area_id ?? (!mapSelectionBbox ? selectedArea?.id ?? null : null)}
+                selectedAreaName={selectedArea?.name ?? null}
+                selectionBbox={mapSelectionBbox}
+              />
+            </div>
+          ) : null}
+
           {activeWorkspace === 'ai' ? (
             <div className="workspace-grid workspace-grid-ai">
               <DetectionLab