Added Device Conflict Resolution

Data/Server/Modules/admin/routes.py

@@ -8,6 +8,8 @@ from typing import Any, Callable, Dict, List, Optional
 
 from flask import Blueprint, jsonify, request
 
+from Modules.guid_utils import normalize_guid
+
 
 VALID_TTL_HOURS = {1, 3, 6, 12, 24}
 
@@ -40,6 +42,72 @@ def register(
             return str(row[0])
         return None
 
+    def _hostname_conflict(
+        cur: sqlite3.Cursor,
+        hostname: Optional[str],
+        pending_guid: Optional[str],
+    ) -> Optional[Dict[str, Any]]:
+        if not hostname:
+            return None
+        cur.execute(
+            """
+            SELECT d.guid, ds.site_id, s.name
+              FROM devices d
+         LEFT JOIN device_sites ds ON ds.device_hostname = d.hostname
+         LEFT JOIN sites s ON s.id = ds.site_id
+             WHERE d.hostname = ?
+            """,
+            (hostname,),
+        )
+        row = cur.fetchone()
+        if not row:
+            return None
+        existing_guid = normalize_guid(row[0])
+        pending_norm = normalize_guid(pending_guid)
+        if existing_guid and pending_norm and existing_guid == pending_norm:
+            return None
+        site_id_raw = row[1]
+        site_id = None
+        if site_id_raw is not None:
+            try:
+                site_id = int(site_id_raw)
+            except (TypeError, ValueError):
+                site_id = None
+        site_name = row[2] or ""
+        return {
+            "guid": existing_guid or None,
+            "site_id": site_id,
+            "site_name": site_name,
+        }
+
+    def _suggest_alternate_hostname(
+        cur: sqlite3.Cursor,
+        hostname: Optional[str],
+        pending_guid: Optional[str],
+    ) -> Optional[str]:
+        base = (hostname or "").strip()
+        if not base:
+            return None
+        base = base[:253]
+        candidate = base
+        pending_norm = normalize_guid(pending_guid)
+        suffix = 1
+        while True:
+            cur.execute(
+                "SELECT guid FROM devices WHERE hostname = ?",
+                (candidate,),
+            )
+            row = cur.fetchone()
+            if not row:
+                return candidate
+            existing_guid = normalize_guid(row[0])
+            if pending_norm and existing_guid == pending_norm:
+                return candidate
+            candidate = f"{base}-{suffix}"
+            suffix += 1
+            if suffix > 50:
+                return pending_norm or candidate
+
     @blueprint.before_request
     def _check_admin():
         result = require_admin()
@@ -177,6 +245,7 @@ def register(
     @blueprint.route("/api/admin/device-approvals", methods=["GET"])
     def list_device_approvals():
         status = request.args.get("status", "pending")
+        approvals: List[Dict[str, Any]] = []
         conn = db_conn_factory()
         try:
             cur = conn.cursor()
@@ -203,17 +272,16 @@ def register(
             sql += " ORDER BY created_at ASC"
             cur.execute(sql, params)
             rows = cur.fetchall()
-        finally:
-            conn.close()
-
-        approvals = []
             for row in rows:
+                record_guid = row[2]
+                hostname = row[3]
+                conflict = _hostname_conflict(cur, hostname, record_guid)
                 approvals.append(
                     {
                         "id": row[0],
                         "approval_reference": row[1],
-                    "guid": row[2],
+                        "guid": record_guid,
-                    "hostname_claimed": row[3],
+                        "hostname_claimed": hostname,
                         "ssl_key_fingerprint_claimed": row[4],
                         "enrollment_code_id": row[5],
                         "status": row[6],
@@ -222,11 +290,24 @@ def register(
                         "created_at": row[9],
                         "updated_at": row[10],
                         "approved_by_user_id": row[11],
+                        "hostname_conflict": conflict,
+                        "alternate_hostname": _suggest_alternate_hostname(cur, hostname, record_guid)
+                        if conflict
+                        else None,
                     }
                 )
+        finally:
+            conn.close()
+
         return jsonify({"approvals": approvals})
 
-    def _set_approval_status(approval_id: str, status: str, guid: Optional[str] = None):
+    def _set_approval_status(
+        approval_id: str,
+        status: str,
+        *,
+        guid: Optional[str] = None,
+        resolution: Optional[str] = None,
+    ):
         user = current_user() or {}
         username = user.get("username") or ""
 
@@ -268,8 +349,12 @@ def register(
             conn.commit()
         finally:
             conn.close()
-        log("server", f"device approval {approval_id} -> {status} by {username}")
+        resolution_note = f" ({resolution})" if resolution else ""
-        return {"status": status}, 200
+        log("server", f"device approval {approval_id} -> {status}{resolution_note} by {username}")
+        payload: Dict[str, Any] = {"status": status}
+        if resolution:
+            payload["conflict_resolution"] = resolution
+        return payload, 200
 
     @blueprint.route("/api/admin/device-approvals/<approval_id>/approve", methods=["POST"])
     def approve_device(approval_id: str):
@@ -277,7 +362,18 @@ def register(
         guid = payload.get("guid")
         if guid:
             guid = str(guid).strip()
-        result, status_code = _set_approval_status(approval_id, "approved", guid=guid)
+        resolution_val = payload.get("conflict_resolution")
+        resolution = None
+        if isinstance(resolution_val, str):
+            cleaned = resolution_val.strip().lower()
+            if cleaned:
+                resolution = cleaned
+        result, status_code = _set_approval_status(
+            approval_id,
+            "approved",
+            guid=guid,
+            resolution=resolution,
+        )
         return jsonify(result), status_code
 
     @blueprint.route("/api/admin/device-approvals/<approval_id>/deny", methods=["POST"])

Data/Server/WebUI/src/Admin/Device_Approvals.jsx

@@ -7,6 +7,11 @@ import {
   Button,
   Chip,
   CircularProgress,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogContentText,
+  DialogTitle,
   FormControl,
   IconButton,
   InputLabel,
@@ -76,6 +81,7 @@ function DeviceApprovals() {
   const [feedback, setFeedback] = useState(null);
   const [guidInputs, setGuidInputs] = useState({});
   const [actioningId, setActioningId] = useState(null);
+  const [conflictPrompt, setConflictPrompt] = useState(null);
 
   const loadApprovals = useCallback(async () => {
     setLoading(true);
@@ -126,25 +132,49 @@ function DeviceApprovals() {
     setGuidInputs((prev) => ({ ...prev, [id]: value }));
   }, []);
 
-  const handleApprove = useCallback(
+  const submitApproval = useCallback(
-    async (record) => {
+    async (record, overrides = {}) => {
       if (!record?.id) return;
       setActioningId(record.id);
       setFeedback(null);
       setError("");
       try {
-        const guid = (guidInputs[record.id] || "").trim();
+        const manualGuid = (guidInputs[record.id] || "").trim();
+        const payload = {};
+        const overrideGuidRaw = overrides.guid;
+        let overrideGuid = "";
+        if (typeof overrideGuidRaw === "string") {
+          overrideGuid = overrideGuidRaw.trim();
+        } else if (overrideGuidRaw != null) {
+          overrideGuid = String(overrideGuidRaw).trim();
+        }
+        if (overrideGuid) {
+          payload.guid = overrideGuid;
+        } else if (manualGuid) {
+          payload.guid = manualGuid;
+        }
+        const resolutionRaw = overrides.conflictResolution || overrides.resolution;
+        if (typeof resolutionRaw === "string" && resolutionRaw.trim()) {
+          payload.conflict_resolution = resolutionRaw.trim().toLowerCase();
+        }
         const resp = await fetch(`/api/admin/device-approvals/${encodeURIComponent(record.id)}/approve`, {
           method: "POST",
           credentials: "include",
           headers: { "Content-Type": "application/json" },
-          body: JSON.stringify(guid ? { guid } : {}),
+          body: JSON.stringify(Object.keys(payload).length ? payload : {}),
         });
-        if (!resp.ok) {
         const body = await resp.json().catch(() => ({}));
+        if (!resp.ok) {
           throw new Error(body.error || `Approval failed (${resp.status})`);
         }
-        setFeedback({ type: "success", message: "Enrollment approved" });
+        const appliedResolution = (body.conflict_resolution || payload.conflict_resolution || "").toLowerCase();
+        let successMessage = "Enrollment approved";
+        if (appliedResolution === "overwrite") {
+          successMessage = "Enrollment approved; existing device overwritten";
+        } else if (appliedResolution === "coexist") {
+          successMessage = "Enrollment approved; devices will co-exist";
+        }
+        setFeedback({ type: "success", message: successMessage });
         await loadApprovals();
       } catch (err) {
         setFeedback({ type: "error", message: err.message || "Unable to approve request" });
@@ -155,6 +185,73 @@ function DeviceApprovals() {
     [guidInputs, loadApprovals]
   );
 
+  const startApprove = useCallback(
+    (record) => {
+      if (!record?.id) return;
+      const status = normalizeStatus(record.status);
+      if (status !== "pending") return;
+      const manualGuid = (guidInputs[record.id] || "").trim();
+      const conflict = record.hostname_conflict;
+      if (conflict && !manualGuid) {
+        const fallbackAlternate =
+          record.alternate_hostname ||
+          (record.hostname_claimed ? `${record.hostname_claimed}-1` : "");
+        setConflictPrompt({
+          record,
+          conflict,
+          alternate: fallbackAlternate || "",
+        });
+        return;
+      }
+      submitApproval(record);
+    },
+    [guidInputs, submitApproval]
+  );
+
+  const handleConflictCancel = useCallback(() => {
+    setConflictPrompt(null);
+  }, []);
+
+  const handleConflictOverwrite = useCallback(() => {
+    if (!conflictPrompt?.record) {
+      setConflictPrompt(null);
+      return;
+    }
+    const { record, conflict } = conflictPrompt;
+    setConflictPrompt(null);
+    const conflictGuid = conflict?.guid != null ? String(conflict.guid).trim() : "";
+    submitApproval(record, {
+      guid: conflictGuid,
+      conflictResolution: "overwrite",
+    });
+  }, [conflictPrompt, submitApproval]);
+
+  const handleConflictCoexist = useCallback(() => {
+    if (!conflictPrompt?.record) {
+      setConflictPrompt(null);
+      return;
+    }
+    const { record } = conflictPrompt;
+    setConflictPrompt(null);
+    submitApproval(record, {
+      conflictResolution: "coexist",
+    });
+  }, [conflictPrompt, submitApproval]);
+
+  const conflictRecord = conflictPrompt?.record;
+  const conflictInfo = conflictPrompt?.conflict;
+  const conflictHostname = conflictRecord?.hostname_claimed || conflictRecord?.hostname || "";
+  const conflictSiteName = conflictInfo?.site_name || "";
+  const conflictSiteDescriptor = conflictInfo
+    ? conflictSiteName
+      ? `under site ${conflictSiteName}`
+      : "under site (not assigned)"
+    : "under site (not assigned)";
+  const conflictAlternate =
+    conflictPrompt?.alternate ||
+    (conflictHostname ? `${conflictHostname}-1` : "hostname-1");
+  const conflictGuidDisplay = conflictInfo?.guid || "";
+
   const handleDeny = useCallback(
     async (record) => {
       if (!record?.id) return;
@@ -303,7 +400,7 @@ function DeviceApprovals() {
                                 <span>
                                   <IconButton
                                     color="success"
-                                    onClick={() => handleApprove(record)}
+                                    onClick={() => startApprove(record)}
                                     disabled={actioningId === record.id}
                                   >
                                     {actioningId === record.id ? (
@@ -341,6 +438,48 @@ function DeviceApprovals() {
           </Table>
         </TableContainer>
       </Paper>
+      <Dialog
+        open={Boolean(conflictPrompt)}
+        onClose={handleConflictCancel}
+        maxWidth="sm"
+        fullWidth
+      >
+        <DialogTitle>Hostname Conflict</DialogTitle>
+        <DialogContent dividers>
+          <Stack spacing={2}>
+            <DialogContentText>
+              {conflictHostname
+                ? `Device ${conflictHostname} already exists in the database ${conflictSiteDescriptor}.`
+                : `A device with this hostname already exists in the database ${conflictSiteDescriptor}.`}
+            </DialogContentText>
+            <DialogContentText>
+              Do you want this device to overwrite the existing device, or allow both to co-exist?
+            </DialogContentText>
+            <DialogContentText>
+              {`Device will be renamed ${conflictAlternate} if you choose to allow both to co-exist.`}
+            </DialogContentText>
+            {conflictGuidDisplay ? (
+              <Typography variant="body2" color="text.secondary">
+                Existing device GUID: {conflictGuidDisplay}
+              </Typography>
+            ) : null}
+          </Stack>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={handleConflictCancel}>Cancel</Button>
+          <Button onClick={handleConflictCoexist} color="info" variant="outlined">
+            Allow Both
+          </Button>
+          <Button
+            onClick={handleConflictOverwrite}
+            color="primary"
+            variant="contained"
+            disabled={!conflictGuidDisplay}
+          >
+            Overwrite Existing
+          </Button>
+        </DialogActions>
+      </Dialog>
     </Box>
   );
 }

Data/Server/WebUI/src/App.jsx

@@ -46,8 +46,8 @@ import CredentialList from "./Access_Management/Credential_List.jsx";
 import UserManagement from "./Access_Management/Users.jsx";
 import GithubAPIToken from "./Access_Management/Github_API_Token.jsx";
 import ServerInfo from "./Admin/Server_Info.jsx";
-import EnrollmentCodes from "./Admin/Enrollment_Codes.jsx";
+import EnrollmentCodes from "./Devices/Enrollment_Codes.jsx";
-import DeviceApprovals from "./Admin/Device_Approvals.jsx";
+import DeviceApprovals from "./Devices/Device_Approvals.jsx";
 
 // Networking Imports
 import { io } from "socket.io-client";

Data/Server/WebUI/src/Devices/Device_Approvals.jsx

@@ -0,0 +1,487 @@
+////////// PROJECT FILE SEPARATION LINE ////////// CODE AFTER THIS LINE ARE FROM: <ProjectRoot>/Data/Server/WebUI/src/Admin/Device_Approvals.jsx
+
+import React, { useCallback, useEffect, useMemo, useState } from "react";
+import {
+  Alert,
+  Box,
+  Button,
+  Chip,
+  CircularProgress,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogContentText,
+  DialogTitle,
+  FormControl,
+  IconButton,
+  InputLabel,
+  MenuItem,
+  Paper,
+  Select,
+  Stack,
+  Table,
+  TableBody,
+  TableCell,
+  TableContainer,
+  TableHead,
+  TableRow,
+  TextField,
+  Tooltip,
+  Typography,
+} from "@mui/material";
+import {
+  CheckCircleOutline as ApproveIcon,
+  HighlightOff as DenyIcon,
+  Refresh as RefreshIcon,
+  Security as SecurityIcon,
+} from "@mui/icons-material";
+
+const STATUS_OPTIONS = [
+  { value: "pending", label: "Pending" },
+  { value: "approved", label: "Approved" },
+  { value: "completed", label: "Completed" },
+  { value: "denied", label: "Denied" },
+  { value: "expired", label: "Expired" },
+  { value: "all", label: "All" },
+];
+
+const statusChipColor = {
+  pending: "warning",
+  approved: "info",
+  completed: "success",
+  denied: "default",
+  expired: "default",
+};
+
+const formatDateTime = (value) => {
+  if (!value) return "—";
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return value;
+  return date.toLocaleString();
+};
+
+const formatFingerprint = (fp) => {
+  if (!fp) return "—";
+  const normalized = fp.replace(/[^a-f0-9]/gi, "").toLowerCase();
+  if (!normalized) return fp;
+  return normalized.match(/.{1,4}/g)?.join(" ") ?? normalized;
+};
+
+const normalizeStatus = (status) => {
+  if (!status) return "pending";
+  if (status === "completed") return "completed";
+  return status.toLowerCase();
+};
+
+function DeviceApprovals() {
+  const [approvals, setApprovals] = useState([]);
+  const [statusFilter, setStatusFilter] = useState("pending");
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState("");
+  const [feedback, setFeedback] = useState(null);
+  const [guidInputs, setGuidInputs] = useState({});
+  const [actioningId, setActioningId] = useState(null);
+  const [conflictPrompt, setConflictPrompt] = useState(null);
+
+  const loadApprovals = useCallback(async () => {
+    setLoading(true);
+    setError("");
+    try {
+      const query = statusFilter === "all" ? "" : `?status=${encodeURIComponent(statusFilter)}`;
+      const resp = await fetch(`/api/admin/device-approvals${query}`, { credentials: "include" });
+      if (!resp.ok) {
+        const body = await resp.json().catch(() => ({}));
+        throw new Error(body.error || `Request failed (${resp.status})`);
+      }
+      const data = await resp.json();
+      setApprovals(Array.isArray(data.approvals) ? data.approvals : []);
+    } catch (err) {
+      setError(err.message || "Unable to load device approvals");
+    } finally {
+      setLoading(false);
+    }
+  }, [statusFilter]);
+
+  useEffect(() => {
+    loadApprovals();
+  }, [loadApprovals]);
+
+  const dedupedApprovals = useMemo(() => {
+    const normalized = approvals
+      .map((record) => ({ ...record, status: normalizeStatus(record.status) }))
+      .sort((a, b) => {
+        const left = new Date(a.created_at || 0).getTime();
+        const right = new Date(b.created_at || 0).getTime();
+        return left - right;
+      });
+    if (statusFilter !== "pending") {
+      return normalized;
+    }
+    const seen = new Set();
+    const unique = [];
+    for (const record of normalized) {
+      const key = record.ssl_key_fingerprint_claimed || record.hostname_claimed || record.id;
+      if (seen.has(key)) continue;
+      seen.add(key);
+      unique.push(record);
+    }
+    return unique;
+  }, [approvals, statusFilter]);
+
+  const handleGuidChange = useCallback((id, value) => {
+    setGuidInputs((prev) => ({ ...prev, [id]: value }));
+  }, []);
+
+  const submitApproval = useCallback(
+    async (record, overrides = {}) => {
+      if (!record?.id) return;
+      setActioningId(record.id);
+      setFeedback(null);
+      setError("");
+      try {
+        const manualGuid = (guidInputs[record.id] || "").trim();
+        const payload = {};
+        const overrideGuidRaw = overrides.guid;
+        let overrideGuid = "";
+        if (typeof overrideGuidRaw === "string") {
+          overrideGuid = overrideGuidRaw.trim();
+        } else if (overrideGuidRaw != null) {
+          overrideGuid = String(overrideGuidRaw).trim();
+        }
+        if (overrideGuid) {
+          payload.guid = overrideGuid;
+        } else if (manualGuid) {
+          payload.guid = manualGuid;
+        }
+        const resolutionRaw = overrides.conflictResolution || overrides.resolution;
+        if (typeof resolutionRaw === "string" && resolutionRaw.trim()) {
+          payload.conflict_resolution = resolutionRaw.trim().toLowerCase();
+        }
+        const resp = await fetch(`/api/admin/device-approvals/${encodeURIComponent(record.id)}/approve`, {
+          method: "POST",
+          credentials: "include",
+          headers: { "Content-Type": "application/json" },
+          body: JSON.stringify(Object.keys(payload).length ? payload : {}),
+        });
+        const body = await resp.json().catch(() => ({}));
+        if (!resp.ok) {
+          throw new Error(body.error || `Approval failed (${resp.status})`);
+        }
+        const appliedResolution = (body.conflict_resolution || payload.conflict_resolution || "").toLowerCase();
+        let successMessage = "Enrollment approved";
+        if (appliedResolution === "overwrite") {
+          successMessage = "Enrollment approved; existing device overwritten";
+        } else if (appliedResolution === "coexist") {
+          successMessage = "Enrollment approved; devices will co-exist";
+        }
+        setFeedback({ type: "success", message: successMessage });
+        await loadApprovals();
+      } catch (err) {
+        setFeedback({ type: "error", message: err.message || "Unable to approve request" });
+      } finally {
+        setActioningId(null);
+      }
+    },
+    [guidInputs, loadApprovals]
+  );
+
+  const startApprove = useCallback(
+    (record) => {
+      if (!record?.id) return;
+      const status = normalizeStatus(record.status);
+      if (status !== "pending") return;
+      const manualGuid = (guidInputs[record.id] || "").trim();
+      const conflict = record.hostname_conflict;
+      if (conflict && !manualGuid) {
+        const fallbackAlternate =
+          record.alternate_hostname ||
+          (record.hostname_claimed ? `${record.hostname_claimed}-1` : "");
+        setConflictPrompt({
+          record,
+          conflict,
+          alternate: fallbackAlternate || "",
+        });
+        return;
+      }
+      submitApproval(record);
+    },
+    [guidInputs, submitApproval]
+  );
+
+  const handleConflictCancel = useCallback(() => {
+    setConflictPrompt(null);
+  }, []);
+
+  const handleConflictOverwrite = useCallback(() => {
+    if (!conflictPrompt?.record) {
+      setConflictPrompt(null);
+      return;
+    }
+    const { record, conflict } = conflictPrompt;
+    setConflictPrompt(null);
+    const conflictGuid = conflict?.guid != null ? String(conflict.guid).trim() : "";
+    submitApproval(record, {
+      guid: conflictGuid,
+      conflictResolution: "overwrite",
+    });
+  }, [conflictPrompt, submitApproval]);
+
+  const handleConflictCoexist = useCallback(() => {
+    if (!conflictPrompt?.record) {
+      setConflictPrompt(null);
+      return;
+    }
+    const { record } = conflictPrompt;
+    setConflictPrompt(null);
+    submitApproval(record, {
+      conflictResolution: "coexist",
+    });
+  }, [conflictPrompt, submitApproval]);
+
+  const conflictRecord = conflictPrompt?.record;
+  const conflictInfo = conflictPrompt?.conflict;
+  const conflictHostname = conflictRecord?.hostname_claimed || conflictRecord?.hostname || "";
+  const conflictSiteName = conflictInfo?.site_name || "";
+  const conflictSiteDescriptor = conflictInfo
+    ? conflictSiteName
+      ? `under site ${conflictSiteName}`
+      : "under site (not assigned)"
+    : "under site (not assigned)";
+  const conflictAlternate =
+    conflictPrompt?.alternate ||
+    (conflictHostname ? `${conflictHostname}-1` : "hostname-1");
+  const conflictGuidDisplay = conflictInfo?.guid || "";
+
+  const handleDeny = useCallback(
+    async (record) => {
+      if (!record?.id) return;
+      const confirmDeny = window.confirm("Deny this enrollment request?");
+      if (!confirmDeny) return;
+      setActioningId(record.id);
+      setFeedback(null);
+      setError("");
+      try {
+        const resp = await fetch(`/api/admin/device-approvals/${encodeURIComponent(record.id)}/deny`, {
+          method: "POST",
+          credentials: "include",
+        });
+        if (!resp.ok) {
+          const body = await resp.json().catch(() => ({}));
+          throw new Error(body.error || `Deny failed (${resp.status})`);
+        }
+        setFeedback({ type: "success", message: "Enrollment denied" });
+        await loadApprovals();
+      } catch (err) {
+        setFeedback({ type: "error", message: err.message || "Unable to deny request" });
+      } finally {
+        setActioningId(null);
+      }
+    },
+    [loadApprovals]
+  );
+
+  return (
+    <Box sx={{ p: 3, display: "flex", flexDirection: "column", gap: 3 }}>
+      <Stack direction="row" alignItems="center" spacing={2}>
+        <SecurityIcon color="primary" />
+        <Typography variant="h5">Device Approval Queue</Typography>
+      </Stack>
+
+      <Paper sx={{ p: 2, display: "flex", flexDirection: "column", gap: 2 }}>
+        <Stack direction={{ xs: "column", sm: "row" }} spacing={2} alignItems={{ xs: "stretch", sm: "center" }}>
+          <FormControl size="small" sx={{ minWidth: 200 }}>
+            <InputLabel id="approval-status-filter-label">Status</InputLabel>
+            <Select
+              labelId="approval-status-filter-label"
+              label="Status"
+              value={statusFilter}
+              onChange={(event) => setStatusFilter(event.target.value)}
+            >
+              {STATUS_OPTIONS.map((option) => (
+                <MenuItem key={option.value} value={option.value}>
+                  {option.label}
+                </MenuItem>
+              ))}
+            </Select>
+          </FormControl>
+
+          <Button
+            variant="outlined"
+            startIcon={<RefreshIcon />}
+            onClick={loadApprovals}
+            disabled={loading}
+          >
+            Refresh
+          </Button>
+        </Stack>
+
+        {feedback ? (
+          <Alert severity={feedback.type} variant="outlined" onClose={() => setFeedback(null)}>
+            {feedback.message}
+          </Alert>
+        ) : null}
+
+        {error ? (
+          <Alert severity="error" variant="outlined">
+            {error}
+          </Alert>
+        ) : null}
+
+        <TableContainer component={Paper} variant="outlined" sx={{ maxHeight: 480 }}>
+          <Table size="small" stickyHeader>
+            <TableHead>
+              <TableRow>
+                <TableCell>Status</TableCell>
+                <TableCell>Hostname</TableCell>
+                <TableCell>Fingerprint</TableCell>
+                <TableCell>Enrollment Code</TableCell>
+                <TableCell>Created</TableCell>
+                <TableCell>Updated</TableCell>
+                <TableCell>Approved By</TableCell>
+                <TableCell align="right">Actions</TableCell>
+              </TableRow>
+            </TableHead>
+            <TableBody>
+              {loading ? (
+                <TableRow>
+                  <TableCell colSpan={8} align="center">
+                    <Stack direction="row" spacing={1} alignItems="center" justifyContent="center">
+                      <CircularProgress size={20} />
+                      <Typography variant="body2">Loading approvals…</Typography>
+                    </Stack>
+                  </TableCell>
+                </TableRow>
+              ) : dedupedApprovals.length === 0 ? (
+                <TableRow>
+                  <TableCell colSpan={8} align="center">
+                    <Typography variant="body2" color="text.secondary">
+                      No enrollment requests match this filter.
+                    </Typography>
+                  </TableCell>
+                </TableRow>
+              ) : (
+                dedupedApprovals.map((record) => {
+                  const status = normalizeStatus(record.status);
+                  const showActions = status === "pending";
+                  const guidValue = guidInputs[record.id] || "";
+                  return (
+                    <TableRow hover key={record.id}>
+                      <TableCell>
+                        <Chip
+                          size="small"
+                          label={status}
+                          color={statusChipColor[status] || "default"}
+                          variant="outlined"
+                        />
+                      </TableCell>
+                      <TableCell>{record.hostname_claimed || "—"}</TableCell>
+                      <TableCell sx={{ fontFamily: "monospace", whiteSpace: "nowrap" }}>
+                        {formatFingerprint(record.ssl_key_fingerprint_claimed)}
+                      </TableCell>
+                      <TableCell sx={{ fontFamily: "monospace" }}>
+                        {record.enrollment_code_id || "—"}
+                      </TableCell>
+                      <TableCell>{formatDateTime(record.created_at)}</TableCell>
+                      <TableCell>{formatDateTime(record.updated_at)}</TableCell>
+                      <TableCell>{record.approved_by_user_id || "—"}</TableCell>
+                      <TableCell align="right">
+                        {showActions ? (
+                          <Stack direction={{ xs: "column", sm: "row" }} spacing={1} alignItems="center">
+                            <TextField
+                              size="small"
+                              label="Optional GUID"
+                              placeholder="Leave empty to auto-generate"
+                              value={guidValue}
+                              onChange={(event) => handleGuidChange(record.id, event.target.value)}
+                              sx={{ minWidth: 200 }}
+                            />
+                            <Stack direction="row" spacing={1}>
+                              <Tooltip title="Approve enrollment">
+                                <span>
+                                  <IconButton
+                                    color="success"
+                                    onClick={() => startApprove(record)}
+                                    disabled={actioningId === record.id}
+                                  >
+                                    {actioningId === record.id ? (
+                                      <CircularProgress color="success" size={20} />
+                                    ) : (
+                                      <ApproveIcon fontSize="small" />
+                                    )}
+                                  </IconButton>
+                                </span>
+                              </Tooltip>
+                              <Tooltip title="Deny enrollment">
+                                <span>
+                                  <IconButton
+                                    color="error"
+                                    onClick={() => handleDeny(record)}
+                                    disabled={actioningId === record.id}
+                                  >
+                                    <DenyIcon fontSize="small" />
+                                  </IconButton>
+                                </span>
+                              </Tooltip>
+                            </Stack>
+                          </Stack>
+                        ) : (
+                          <Typography variant="body2" color="text.secondary">
+                            No actions available
+                          </Typography>
+                        )}
+                      </TableCell>
+                    </TableRow>
+                  );
+                })
+              )}
+            </TableBody>
+          </Table>
+        </TableContainer>
+      </Paper>
+      <Dialog
+        open={Boolean(conflictPrompt)}
+        onClose={handleConflictCancel}
+        maxWidth="sm"
+        fullWidth
+      >
+        <DialogTitle>Hostname Conflict</DialogTitle>
+        <DialogContent dividers>
+          <Stack spacing={2}>
+            <DialogContentText>
+              {conflictHostname
+                ? `Device ${conflictHostname} already exists in the database ${conflictSiteDescriptor}.`
+                : `A device with this hostname already exists in the database ${conflictSiteDescriptor}.`}
+            </DialogContentText>
+            <DialogContentText>
+              Do you want this device to overwrite the existing device, or allow both to co-exist?
+            </DialogContentText>
+            <DialogContentText>
+              {`Device will be renamed ${conflictAlternate} if you choose to allow both to co-exist.`}
+            </DialogContentText>
+            {conflictGuidDisplay ? (
+              <Typography variant="body2" color="text.secondary">
+                Existing device GUID: {conflictGuidDisplay}
+              </Typography>
+            ) : null}
+          </Stack>
+        </DialogContent>
+        <DialogActions>
+          <Button onClick={handleConflictCancel}>Cancel</Button>
+          <Button onClick={handleConflictCoexist} color="info" variant="outlined">
+            Allow Both
+          </Button>
+          <Button
+            onClick={handleConflictOverwrite}
+            color="primary"
+            variant="contained"
+            disabled={!conflictGuidDisplay}
+          >
+            Overwrite Existing
+          </Button>
+        </DialogActions>
+      </Dialog>
+    </Box>
+  );
+}
+
+export default React.memo(DeviceApprovals);