diff --git a/src/components/ui/date-range-picker.tsx b/src/components/ui/date-range-picker.tsx
new file mode 100644
index 0000000..153acae
--- /dev/null
+++ b/src/components/ui/date-range-picker.tsx
@@ -0,0 +1,99 @@
+import { useState } from "react"
+import { Button } from "@/components/ui/button"
+import { Input } from "@/components/ui/input"
+import { Label } from "@/components/ui/label"
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+  DialogTrigger,
+} from "@/components/ui/dialog"
+import { Calendar, X } from "lucide-react"
+import { format } from "date-fns"
+
+interface DateRangePickerProps {
+  startDate?: string
+  endDate?: string
+  onDateRangeChange: (startDate?: string, endDate?: string) => void
+  className?: string
+}
+
+export function DateRangePicker({ startDate, endDate, onDateRangeChange, className }: DateRangePickerProps) {
+  const [open, setOpen] = useState(false)
+  const [localStartDate, setLocalStartDate] = useState(startDate || "")
+  const [localEndDate, setLocalEndDate] = useState(endDate || "")
+
+  const handleApply = () => {
+    onDateRangeChange(localStartDate || undefined, localEndDate || undefined)
+    setOpen(false)
+  }
+
+  const handleClear = () => {
+    setLocalStartDate("")
+    setLocalEndDate("")
+    onDateRangeChange(undefined, undefined)
+    setOpen(false)
+  }
+
+  const displayText = () => {
+    if (startDate && endDate) {
+      try {
+        const start = format(new Date(startDate), "MMM dd, yyyy")
+        const end = format(new Date(endDate), "MMM dd, yyyy")
+        return `${start} - ${end}`
+      } catch {
+        return "Invalid date range"
+      }
+    }
+    return "Select date range"
+  }
+
+  return (
+    <Dialog open={open} onOpenChange={setOpen}>
+      <DialogTrigger asChild>
+        <Button variant="outline" className={className}>
+          <Calendar className="w-4 h-4 mr-2" />
+          {displayText()}
+        </Button>
+      </DialogTrigger>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>Select Date Range</DialogTitle>
+          <DialogDescription>
+            Choose a start and end date to filter logs
+          </DialogDescription>
+        </DialogHeader>
+        <div className="space-y-4 py-4">
+          <div className="space-y-2">
+            <Label htmlFor="start-date">Start Date</Label>
+            <Input
+              id="start-date"
+              type="date"
+              value={localStartDate}
+              onChange={(e) => setLocalStartDate(e.target.value)}
+            />
+          </div>
+          <div className="space-y-2">
+            <Label htmlFor="end-date">End Date</Label>
+            <Input
+              id="end-date"
+              type="date"
+              value={localEndDate}
+              onChange={(e) => setLocalEndDate(e.target.value)}
+            />
+          </div>
+          <div className="flex items-center justify-between">
+            <Button variant="outline" onClick={handleClear}>
+              <X className="w-4 h-4 mr-2" />
+              Clear
+            </Button>
+            <Button onClick={handleApply}>Apply</Button>
+          </div>
+        </div>
+      </DialogContent>
+    </Dialog>
+  )
+}
+
diff --git a/src/lib/api-client.ts b/src/lib/api-client.ts
index 90f0a80..25571fc 100644
--- a/src/lib/api-client.ts
+++ b/src/lib/api-client.ts
@@ -32,6 +32,35 @@ adminApi.interceptors.response.use(
       // Redirect to login
       localStorage.removeItem('access_token');
       window.location.href = '/login';
+    } else if (error.response?.status === 403) {
+      // Show access denied
+      const message = error.response?.data?.message || 'You do not have permission to access this resource';
+      if (typeof window !== 'undefined') {
+        import('sonner').then(({ toast }) => {
+          toast.error(message);
+        });
+      }
+    } else if (error.response?.status === 404) {
+      const message = error.response?.data?.message || 'Resource not found';
+      if (typeof window !== 'undefined') {
+        import('sonner').then(({ toast }) => {
+          toast.error(message);
+        });
+      }
+    } else if (error.response?.status === 500) {
+      const message = error.response?.data?.message || 'Server error occurred. Please try again later.';
+      if (typeof window !== 'undefined') {
+        import('sonner').then(({ toast }) => {
+          toast.error(message);
+        });
+      }
+    } else if (!error.response) {
+      // Network error
+      if (typeof window !== 'undefined') {
+        import('sonner').then(({ toast }) => {
+          toast.error('Network error. Please check your connection.');
+        });
+      }
     }
     return Promise.reject(error);
   }
diff --git a/src/pages/admin/dashboard/index.tsx b/src/pages/admin/dashboard/index.tsx
index c222cd5..5f4a2ee 100644
--- a/src/pages/admin/dashboard/index.tsx
+++ b/src/pages/admin/dashboard/index.tsx
@@ -39,6 +39,14 @@ export default function DashboardPage() {
     },
   })
 
+  const { data: errorRate, isLoading: errorRateLoading } = useQuery({
+    queryKey: ['admin', 'analytics', 'error-rate'],
+    queryFn: async () => {
+      const response = await adminApiHelpers.getErrorRate(7)
+      return response.data
+    },
+  })
+
   const handleExport = () => {
     toast.success("Exporting dashboard data...")
   }
@@ -215,6 +223,50 @@ export default function DashboardPage() {
         </Card>
       </div>
 
+      {/* Error Rate Chart */}
+      {errorRate && (
+        <Card>
+          <CardHeader>
+            <CardTitle className="flex items-center gap-2">
+              <AlertCircle className="h-5 w-5" />
+              Error Rate (Last 7 Days)
+            </CardTitle>
+          </CardHeader>
+          <CardContent>
+            {errorRateLoading ? (
+              <div className="h-[200px] flex items-center justify-center">Loading...</div>
+            ) : (
+              <div className="space-y-4">
+                <div className="grid grid-cols-3 gap-4">
+                  <div>
+                    <p className="text-sm text-muted-foreground">Total Errors</p>
+                    <p className="text-2xl font-bold">{errorRate.errors || 0}</p>
+                  </div>
+                  <div>
+                    <p className="text-sm text-muted-foreground">Total Requests</p>
+                    <p className="text-2xl font-bold">{errorRate.total || 0}</p>
+                  </div>
+                  <div>
+                    <p className="text-sm text-muted-foreground">Error Rate</p>
+                    <p className="text-2xl font-bold">
+                      {errorRate.errorRate ? `${errorRate.errorRate.toFixed(2)}%` : '0%'}
+                    </p>
+                  </div>
+                </div>
+                <div className="w-full bg-muted rounded-full h-4">
+                  <div
+                    className="bg-destructive h-4 rounded-full transition-all"
+                    style={{
+                      width: `${Math.min(errorRate.errorRate || 0, 100)}%`,
+                    }}
+                  />
+                </div>
+              </div>
+            )}
+          </CardContent>
+        </Card>
+      )}
+
       {/* System Health */}
       <Card>
         <CardHeader>
diff --git a/src/pages/admin/settings/index.tsx b/src/pages/admin/settings/index.tsx
index f805dd5..8a2a7c9 100644
--- a/src/pages/admin/settings/index.tsx
+++ b/src/pages/admin/settings/index.tsx
@@ -5,12 +5,29 @@ import { Button } from "@/components/ui/button"
 import { Input } from "@/components/ui/input"
 import { Label } from "@/components/ui/label"
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs"
+import { Switch } from "@/components/ui/switch"
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog"
+import { Plus } from "lucide-react"
 import { adminApiHelpers } from "@/lib/api-client"
 import { toast } from "sonner"
 
 export default function SettingsPage() {
   const queryClient = useQueryClient()
   const [selectedCategory, setSelectedCategory] = useState<string>("GENERAL")
+  const [createDialogOpen, setCreateDialogOpen] = useState(false)
+  const [newSetting, setNewSetting] = useState({
+    key: "",
+    value: "",
+    description: "",
+    isPublic: false,
+  })
 
   const { data: settings, isLoading } = useQuery({
     queryKey: ['admin', 'settings', selectedCategory],
@@ -33,13 +50,54 @@ export default function SettingsPage() {
     },
   })
 
+  const createSettingMutation = useMutation({
+    mutationFn: async (data: {
+      key: string
+      value: string
+      category: string
+      description?: string
+      isPublic?: boolean
+    }) => {
+      await adminApiHelpers.createSetting(data)
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ['admin', 'settings'] })
+      toast.success("Setting created successfully")
+      setCreateDialogOpen(false)
+      setNewSetting({ key: "", value: "", description: "", isPublic: false })
+    },
+    onError: (error: any) => {
+      toast.error(error.response?.data?.message || "Failed to create setting")
+    },
+  })
+
   const handleSave = (key: string, value: string) => {
     updateSettingMutation.mutate({ key, value })
   }
 
+  const handleCreate = () => {
+    if (!newSetting.key || !newSetting.value) {
+      toast.error("Key and value are required")
+      return
+    }
+    createSettingMutation.mutate({
+      key: newSetting.key,
+      value: newSetting.value,
+      category: selectedCategory,
+      description: newSetting.description || undefined,
+      isPublic: newSetting.isPublic,
+    })
+  }
+
   return (
     <div className="space-y-6">
-      <h2 className="text-3xl font-bold">System Settings</h2>
+      <div className="flex items-center justify-between">
+        <h2 className="text-3xl font-bold">System Settings</h2>
+        <Button onClick={() => setCreateDialogOpen(true)}>
+          <Plus className="w-4 h-4 mr-2" />
+          Create Setting
+        </Button>
+      </div>
 
       <Tabs value={selectedCategory} onValueChange={setSelectedCategory}>
         <TabsList>
@@ -88,6 +146,68 @@ export default function SettingsPage() {
           </Card>
         </TabsContent>
       </Tabs>
+
+      {/* Create Setting Dialog */}
+      <Dialog open={createDialogOpen} onOpenChange={setCreateDialogOpen}>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Create New Setting</DialogTitle>
+            <DialogDescription>
+              Create a new system setting in the {selectedCategory} category
+            </DialogDescription>
+          </DialogHeader>
+          <div className="space-y-4 py-4">
+            <div className="space-y-2">
+              <Label htmlFor="setting-key">Key *</Label>
+              <Input
+                id="setting-key"
+                placeholder="setting.key"
+                value={newSetting.key}
+                onChange={(e) => setNewSetting({ ...newSetting, key: e.target.value })}
+              />
+            </div>
+            <div className="space-y-2">
+              <Label htmlFor="setting-value">Value *</Label>
+              <Input
+                id="setting-value"
+                placeholder="Setting value"
+                value={newSetting.value}
+                onChange={(e) => setNewSetting({ ...newSetting, value: e.target.value })}
+              />
+            </div>
+            <div className="space-y-2">
+              <Label htmlFor="setting-description">Description</Label>
+              <Input
+                id="setting-description"
+                placeholder="Setting description"
+                value={newSetting.description}
+                onChange={(e) => setNewSetting({ ...newSetting, description: e.target.value })}
+              />
+            </div>
+            <div className="flex items-center space-x-2">
+              <Switch
+                id="setting-public"
+                checked={newSetting.isPublic}
+                onCheckedChange={(checked) => setNewSetting({ ...newSetting, isPublic: checked })}
+              />
+              <Label htmlFor="setting-public" className="text-sm">
+                Public (accessible via API)
+              </Label>
+            </div>
+          </div>
+          <DialogFooter>
+            <Button variant="outline" onClick={() => {
+              setCreateDialogOpen(false)
+              setNewSetting({ key: "", value: "", description: "", isPublic: false })
+            }}>
+              Cancel
+            </Button>
+            <Button onClick={handleCreate} disabled={createSettingMutation.isPending}>
+              {createSettingMutation.isPending ? "Creating..." : "Create"}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
     </div>
   )
 }
diff --git a/src/pages/admin/users/index.tsx b/src/pages/admin/users/index.tsx
index 4268f65..b69a564 100644
--- a/src/pages/admin/users/index.tsx
+++ b/src/pages/admin/users/index.tsx
@@ -5,6 +5,7 @@ import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
 import { Button } from "@/components/ui/button"
 import { Input } from "@/components/ui/input"
 import { Badge } from "@/components/ui/badge"
+import { Label } from "@/components/ui/label"
 import {
   Table,
   TableBody,
@@ -28,7 +29,7 @@ import {
   DialogHeader,
   DialogTitle,
 } from "@/components/ui/dialog"
-import { Search, Download, Eye, MoreVertical, UserPlus, Edit, Trash2, Key } from "lucide-react"
+import { Search, Download, Eye, MoreVertical, UserPlus, Edit, Trash2, Key, Upload } from "lucide-react"
 import { adminApiHelpers } from "@/lib/api-client"
 import { toast } from "sonner"
 import { format } from "date-fns"
@@ -44,6 +45,8 @@ export default function UsersPage() {
   const [selectedUser, setSelectedUser] = useState<any>(null)
   const [deleteDialogOpen, setDeleteDialogOpen] = useState(false)
   const [resetPasswordDialogOpen, setResetPasswordDialogOpen] = useState(false)
+  const [importDialogOpen, setImportDialogOpen] = useState(false)
+  const [importFile, setImportFile] = useState<File | null>(null)
 
   const { data: usersData, isLoading } = useQuery({
     queryKey: ['admin', 'users', page, limit, search, roleFilter, statusFilter],
@@ -85,6 +88,25 @@ export default function UsersPage() {
     },
   })
 
+  const importUsersMutation = useMutation({
+    mutationFn: async (file: File) => {
+      const response = await adminApiHelpers.importUsers(file)
+      return response.data
+    },
+    onSuccess: (data) => {
+      queryClient.invalidateQueries({ queryKey: ['admin', 'users'] })
+      toast.success(`Imported ${data.success} users. ${data.failed} failed.`)
+      setImportDialogOpen(false)
+      setImportFile(null)
+      if (data.errors && data.errors.length > 0) {
+        console.error('Import errors:', data.errors)
+      }
+    },
+    onError: (error: any) => {
+      toast.error(error.response?.data?.message || "Failed to import users")
+    },
+  })
+
   const handleExport = async () => {
     try {
       const response = await adminApiHelpers.exportUsers('csv')
@@ -112,6 +134,19 @@ export default function UsersPage() {
     }
   }
 
+  const handleImport = () => {
+    if (importFile) {
+      importUsersMutation.mutate(importFile)
+    }
+  }
+
+  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    const file = e.target.files?.[0]
+    if (file) {
+      setImportFile(file)
+    }
+  }
+
   const getRoleBadgeVariant = (role: string) => {
     switch (role) {
       case 'ADMIN':
@@ -129,10 +164,16 @@ export default function UsersPage() {
     <div className="space-y-6">
       <div className="flex items-center justify-between">
         <h2 className="text-3xl font-bold">Users Management</h2>
-        <Button>
-          <UserPlus className="w-4 h-4 mr-2" />
-          Add User
-        </Button>
+        <div className="flex gap-2">
+          <Button variant="outline" onClick={() => setImportDialogOpen(true)}>
+            <Upload className="w-4 h-4 mr-2" />
+            Import Users
+          </Button>
+          <Button>
+            <UserPlus className="w-4 h-4 mr-2" />
+            Add User
+          </Button>
+        </div>
       </div>
 
       <Card>
@@ -320,6 +361,45 @@ export default function UsersPage() {
           </DialogFooter>
         </DialogContent>
       </Dialog>
+
+      {/* Import Users Dialog */}
+      <Dialog open={importDialogOpen} onOpenChange={setImportDialogOpen}>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Import Users</DialogTitle>
+            <DialogDescription>
+              Upload a CSV file with user data. The file should contain columns: email, firstName, lastName, role (optional).
+            </DialogDescription>
+          </DialogHeader>
+          <div className="space-y-4 py-4">
+            <div className="space-y-2">
+              <Label htmlFor="import-file">CSV File</Label>
+              <Input
+                id="import-file"
+                type="file"
+                accept=".csv"
+                onChange={handleFileChange}
+              />
+              {importFile && (
+                <p className="text-sm text-muted-foreground">
+                  Selected: {importFile.name}
+                </p>
+              )}
+            </div>
+          </div>
+          <DialogFooter>
+            <Button variant="outline" onClick={() => {
+              setImportDialogOpen(false)
+              setImportFile(null)
+            }}>
+              Cancel
+            </Button>
+            <Button onClick={handleImport} disabled={!importFile || importUsersMutation.isPending}>
+              {importUsersMutation.isPending ? "Importing..." : "Import"}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
     </div>
   )
 }