feat: add host editing endpoint and frontend UI

crates/pm-agent-client/src/client.rs

@@ -105,7 +105,7 @@ impl AgentClient {
             .add_root_certificate(ca_cert)
             .timeout(REQUEST_TIMEOUT)
             .build()
-            .map_err(|e| AgentClientError::Request(e))?;
+            .map_err(AgentClientError::Request)?;
 
         let clean_ip = host_ip.split('/').next().unwrap_or(host_ip);
         let base_url = format!("https://{}:{}/api/v1", clean_ip, port);

crates/pm-auth/src/jwt.rs

@@ -121,6 +121,7 @@ pub fn load_verify_key(path: &str) -> Result<String, JwtError> {
 }
 
 #[cfg(test)]
+#[allow(dead_code)]
 mod tests {
     use super::*;
 

crates/pm-auth/src/rbac.rs

@@ -40,6 +40,7 @@ pub enum UserRole {
 }
 
 impl UserRole {
+    #[allow(clippy::should_implement_trait)]
     pub fn from_str(s: &str) -> Option<Self> {
         match s {
             "admin" => Some(Self::Admin),

crates/pm-auth/src/session.rs

@@ -69,6 +69,7 @@ pub struct SessionUser {
 
 /// Database user row fetched during login.
 #[derive(Debug, sqlx::FromRow)]
+#[allow(dead_code)]
 struct DbUser {
     id: Uuid,
     username: String,

crates/pm-core/src/audit.rs

@@ -97,6 +97,7 @@ impl AuditAction {
 /// Computes a hash chain entry using the previous row's hash.
 /// Non-fatal: logs errors but does not propagate them to avoid
 /// disrupting the primary operation.
+#[allow(clippy::too_many_arguments)]
 pub async fn log_event(
     pool: &PgPool,
     action: AuditAction,
@@ -126,6 +127,7 @@ pub async fn log_event(
     }
 }
 
+#[allow(clippy::too_many_arguments)]
 async fn write_audit_row(
     pool: &PgPool,
     action: AuditAction,

crates/pm-core/src/crypto.rs

@@ -29,7 +29,7 @@ pub fn load_or_create_key(path: &Path) -> Result<[u8; 32], CryptoError> {
         if let Some(parent) = path.parent() {
             fs::create_dir_all(parent).map_err(CryptoError::Io)?;
         }
-        fs::write(path, &key).map_err(CryptoError::Io)?;
+        fs::write(path, key).map_err(CryptoError::Io)?;
         // Set permissions to 0600 (owner read/write only)
         #[cfg(unix)]
         {

crates/pm-core/src/db.rs

@@ -72,9 +72,9 @@ pub async fn create_enrollment_request(
         EnrollmentRequest,
     >(
         r#"
-        INSERT INTO enrollment_requests (machine_id, fqdn, ip_address, os_details, polling_token)
-        VALUES ($1, $2, $3::inet, $4, $5)
-        RETURNING id, machine_id, fqdn, ip_address::text, os_details, polling_token, created_at, expires_at
+        INSERT INTO enrollment_requests (machine_id, fqdn, ip_address, os_details, polling_token, hostname)
+        VALUES ($1, $2, $3::inet, $4, $5, $6)
+        RETURNING id, machine_id, fqdn, ip_address::text, os_details, polling_token, hostname, created_at, expires_at
         "#,
     )
     .bind(req.machine_id)
@@ -82,6 +82,7 @@ pub async fn create_enrollment_request(
     .bind(req.ip_address)
     .bind(req.os_details)
     .bind(token_hash)
+    .bind(&req.hostname)
     .fetch_one(pool)
     .await
 }
@@ -90,7 +91,7 @@ pub async fn list_enrollment_requests(
     pool: &PgPool,
 ) -> Result<Vec<EnrollmentRequest>, sqlx::Error> {
     sqlx::query_as::<_, EnrollmentRequest>(
-        "SELECT id, machine_id, fqdn, ip_address::text, os_details, polling_token, created_at, expires_at FROM enrollment_requests ORDER BY created_at DESC",
+        "SELECT id, machine_id, fqdn, ip_address::text, os_details, polling_token, hostname, created_at, expires_at FROM enrollment_requests ORDER BY created_at DESC",
     )
     .fetch_all(pool)
     .await

crates/pm-core/src/models.rs

@@ -107,6 +107,14 @@ pub struct CreateHostRequest {
     pub group_ids: Option<Vec<Uuid>>,
 }
 
+/// Payload for updating an existing host.
+#[derive(Debug, Deserialize)]
+pub struct UpdateHostRequest {
+    pub fqdn: Option<String>,
+    pub ip_address: Option<String>,
+    pub display_name: Option<String>,
+}
+
 /// Host list item (lighter projection for list views)
 #[derive(Debug, Clone, Serialize, Deserialize, FromRow)]
 pub struct HostSummary {
@@ -135,6 +143,8 @@ pub struct EnrollmentRequest {
     pub ip_address: String,
     pub os_details: serde_json::Value,
     pub polling_token: String,
+    /// Short hostname provided during enrollment (optional).
+    pub hostname: Option<String>,
     pub created_at: DateTime<Utc>,
     pub expires_at: DateTime<Utc>,
 }
@@ -146,6 +156,8 @@ pub struct CreateEnrollmentRequest {
     pub fqdn: String,
     pub ip_address: String,
     pub os_details: serde_json::Value,
+    /// Short hostname (from /etc/hostname, optional).
+    pub hostname: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]

crates/pm-reports/src/csv.rs

@@ -77,7 +77,7 @@ ORDER BY compliance_pct ASC
     };
 
     let mut wtr = csv::Writer::from_writer(vec![]);
-    wtr.write_record(&[
+    wtr.write_record([
         "host_id",
         "display_name",
         "fqdn",
@@ -115,7 +115,7 @@ ORDER BY compliance_pct ASC
         ])?;
     }
 
-    Ok(wtr.into_inner().context("csv flush failed")?)
+    wtr.into_inner().context("csv flush failed")
 }
 
 // ---------------------------------------------------------------------------
@@ -152,7 +152,7 @@ ORDER BY pjh.started_at DESC
     .context("patch history query failed")?;
 
     let mut wtr = csv::Writer::from_writer(vec![]);
-    wtr.write_record(&[
+    wtr.write_record([
         "job_id",
         "job_kind",
         "job_status",
@@ -194,7 +194,7 @@ ORDER BY pjh.started_at DESC
         ])?;
     }
 
-    Ok(wtr.into_inner().context("csv flush failed")?)
+    wtr.into_inner().context("csv flush failed")
 }
 
 // ---------------------------------------------------------------------------
@@ -203,7 +203,7 @@ ORDER BY pjh.started_at DESC
 
 async fn vulnerability_csv(pool: &sqlx::PgPool, params: &ReportParams) -> anyhow::Result<Vec<u8>> {
     let mut wtr = csv::Writer::from_writer(vec![]);
-    wtr.write_record(&[
+    wtr.write_record([
         "host_id",
         "display_name",
         "fqdn",
@@ -279,7 +279,7 @@ ORDER BY
         },
     }
 
-    Ok(wtr.into_inner().context("csv flush failed")?)
+    wtr.into_inner().context("csv flush failed")
 }
 
 // ---------------------------------------------------------------------------
@@ -312,7 +312,7 @@ LIMIT 10000
     .context("audit query failed")?;
 
     let mut wtr = csv::Writer::from_writer(vec![]);
-    wtr.write_record(&[
+    wtr.write_record([
         "id",
         "created_at",
         "action",
@@ -347,5 +347,5 @@ LIMIT 10000
         ])?;
     }
 
-    Ok(wtr.into_inner().context("csv flush failed")?)
+    wtr.into_inner().context("csv flush failed")
 }

crates/pm-reports/src/pdf.rs

@@ -169,6 +169,7 @@ impl PdfBuilder {
         self.current_y -= ROW_H;
     }
 
+    #[allow(clippy::too_many_arguments)]
     fn embed_image(
         &self,
         raw_rgb: Vec<u8>,

crates/pm-web/src/routes/discovery.rs

@@ -174,7 +174,7 @@ async fn probe_and_store(pool: sqlx::PgPool, scan_id: Uuid, ip: IpAddr, port: u1
 /// Simple reverse DNS lookup.
 fn dns_lookup_for_ip(ip: IpAddr) -> Option<String> {
     use std::net::{SocketAddr, ToSocketAddrs};
-    let addr = SocketAddr::new(ip, 0);
+    let _addr = SocketAddr::new(ip, 0);
     // Standard library doesn't have reverse lookup; use getaddrinfo via format
     let host = format!("{ip}");
     // Best-effort: try to resolve numeric address to hostname

crates/pm-web/src/routes/enrollment.rs

@@ -1,6 +1,6 @@
 use crate::AppState;
 use axum::{
-    extract::{ConnectInfo, Path, State},
+    extract::{Path, State},
     http::{HeaderMap, StatusCode},
     response::{IntoResponse, Response},
     routing::{delete, get, post},
@@ -16,7 +16,7 @@ use pm_core::{
 };
 use rand::{distributions::Alphanumeric, Rng};
 use serde::Serialize;
-use std::net::{IpAddr, SocketAddr};
+use std::net::IpAddr;
 use std::time::Instant;
 
 #[derive(Debug, Clone, Serialize)]
@@ -167,7 +167,7 @@ async fn list_admin_enrollments(
 
     db::list_enrollment_requests(&state.db)
         .await
-        .map(|requests| Json(requests))
+        .map(Json)
         .map_err(|e| {
             tracing::error!(error = %e, "Failed to list enrollment requests");
             (
@@ -212,7 +212,7 @@ async fn approve_enrollment(
         "SELECT id, fqdn, ip_address::text, display_name, os_family, os_name, arch, agent_version, health_status, last_health_at, last_patch_at, agent_port, notes, registered_at, updated_at FROM hosts WHERE fqdn = $1 OR ip_address = $2::inet"
     )
     .bind(&enrollment_request.fqdn)
-    .bind(&enrollment_request.ip_address.to_string())
+    .bind(enrollment_request.ip_address.to_string())
     .fetch_optional(&state.db)
     .await
     .map_err(|e| {
@@ -231,16 +231,21 @@ async fn approve_enrollment(
         .get("name")
         .and_then(|v| v.as_str())
         .map(|s| s.to_string());
+    let display_name = enrollment_request
+        .hostname
+        .clone()
+        .unwrap_or_else(|| enrollment_request.fqdn.clone());
     sqlx::query(
         r#"
-        INSERT INTO hosts (id, fqdn, ip_address, os_name, registered_at, updated_at)
-        VALUES ($1, $2, $3::inet, $4, NOW(), NOW())
+        INSERT INTO hosts (id, fqdn, ip_address, os_name, display_name, registered_at, updated_at)
+        VALUES ($1, $2, $3::inet, $4, $5, NOW(), NOW())
         "#,
     )
     .bind(enrollment_request.id)
     .bind(&enrollment_request.fqdn)
-    .bind(&enrollment_request.ip_address.to_string())
+    .bind(enrollment_request.ip_address.to_string())
     .bind(os_name)
+    .bind(&display_name)
     .execute(&state.db)
     .await
     .map_err(|e| {

crates/pm-web/src/routes/groups.rs

@@ -12,7 +12,7 @@ use axum::{
     extract::{Path, State},
     http::StatusCode,
     response::Json,
-    routing::{delete, get, post, put},
+    routing::{get, post},
     Router,
 };
 use pm_auth::rbac::AuthUser;

crates/pm-web/src/routes/health_checks.rs

@@ -11,7 +11,7 @@ use axum::{
     extract::{Path, State},
     http::StatusCode,
     response::Json,
-    routing::{delete, get, post, put},
+    routing::{get, post},
     Router,
 };
 use pm_auth::rbac::AuthUser;
@@ -24,7 +24,7 @@ use pm_core::{
     },
 };
 use reqwest::tls::Version;
-use serde::{Deserialize, Serialize};
+use serde::Serialize;
 use serde_json::{json, Value};
 use std::path::PathBuf;
 use uuid::Uuid;
@@ -631,7 +631,6 @@ async fn update_health_check(
         set_clauses.push(format!("basic_auth_pass_encrypted = ${}", param_idx));
         param_idx += 1;
         set_clauses.push(format!("basic_auth_pass_nonce = ${}", param_idx));
-        param_idx += 1;
     }
 
     if set_clauses.is_empty() {
@@ -644,7 +643,7 @@ async fn update_health_check(
     }
 
     // Always update updated_at
-    set_clauses.push(format!("updated_at = NOW()"));
+    set_clauses.push("updated_at = NOW()".to_string());
 
     // Use a simpler approach: query the current row, apply changes, update
     // This avoids complex dynamic SQL binding issues
@@ -945,7 +944,7 @@ async fn run_service_check(check: &HealthCheck, state: &AppState) -> CheckResult
                         }
                         CheckResult {
                             healthy: false,
-                            detail: format!("Failed to parse agent response"),
+                            detail: "Failed to parse agent response".to_string(),
                             latency_ms: Some(latency),
                         }
                     },

crates/pm-web/src/routes/hosts.rs

@@ -4,6 +4,7 @@
 //! POST   /api/v1/hosts            — register new host (admin only)
 //! GET    /api/v1/hosts/{id}       — get host detail
 //! DELETE /api/v1/hosts/{id}       — remove host (admin only)
+//! PUT    /api/v1/hosts/{id}       — update host (write access)
 //! GET    /api/v1/hosts/{id}/groups — list groups for host
 //! POST   /api/v1/hosts/{id}/groups — assign host to group
 //! DELETE /api/v1/hosts/{id}/groups/{group_id} — remove host from group
@@ -19,7 +20,7 @@ use axum::{
 use pm_auth::rbac::AuthUser;
 use pm_core::{
     audit::{log_event, AuditAction},
-    models::{CreateHostRequest, Group, HostSummary},
+    models::{CreateHostRequest, Group, HostSummary, UpdateHostRequest},
 };
 use serde::{Deserialize, Serialize};
 use serde_json::{json, Value};
@@ -30,7 +31,7 @@ use crate::AppState;
 pub fn router() -> Router<AppState> {
     Router::new()
         .route("/", get(list_hosts).post(register_host))
-        .route("/{id}", get(get_host).delete(remove_host))
+        .route("/{id}", get(get_host).put(update_host).delete(remove_host))
         .route(
             "/{id}/groups",
             get(list_host_groups).post(add_host_to_group),
@@ -42,6 +43,7 @@ pub fn router() -> Router<AppState> {
 // ── Query params ─────────────────────────────────────────────────────────────
 
 #[derive(Debug, Deserialize)]
+#[allow(dead_code)]
 pub struct HostListQuery {
     pub group_id: Option<Uuid>,
     pub health_status: Option<String>,
@@ -398,6 +400,69 @@ async fn remove_host(
     Ok(Json(json!({ "message": "Host removed" })))
 }
 
+// ── PUT /api/v1/hosts/:id ─────────────────────────────────────────────────────
+
+async fn update_host(
+    State(state): State<AppState>,
+    auth: AuthUser,
+    Path(id): Path<Uuid>,
+    Json(req): Json<UpdateHostRequest>,
+) -> Result<Json<Value>, (StatusCode, Json<Value>)> {
+    if !auth.role.can_write() {
+        return Err((
+            StatusCode::FORBIDDEN,
+            Json(json!({ "error": { "code": "forbidden", "message": "Write access required" } })),
+        ));
+    }
+
+    // Update only fields that were provided; COALESCE preserves existing values.
+    let host = sqlx::query_scalar(
+        r#"
+        WITH updated AS (
+            UPDATE hosts SET
+                fqdn         = COALESCE($1, fqdn),
+                ip_address   = COALESCE($2::inet, ip_address),
+                display_name = COALESCE($3, display_name),
+                updated_at   = NOW()
+            WHERE id = $4
+            RETURNING id
+        )
+        SELECT row_to_json(h) FROM (
+            SELECT id, fqdn, host(ip_address)::text AS ip_address, display_name,
+                   os_family, os_name, arch, agent_version, health_status,
+                   last_health_at, last_patch_at, agent_port, notes,
+                   registered_at, updated_at
+            FROM hosts WHERE id = (SELECT id FROM updated)
+        ) h
+        "#,
+    )
+    .bind(&req.fqdn)
+    .bind(&req.ip_address)
+    .bind(&req.display_name)
+    .bind(id)
+    .fetch_optional(&state.db)
+    .await
+    .map_err(|e| {
+        tracing::error!(error = %e, host_id = %id, "Failed to update host");
+        let msg = if e.to_string().contains("unique") {
+            "A host with this FQDN and IP already exists".to_string()
+        } else {
+            "Database error".to_string()
+        };
+        (
+            StatusCode::CONFLICT,
+            Json(json!({ "error": { "code": "conflict", "message": msg } })),
+        )
+    })?;
+
+    host.map(Json).ok_or_else(|| {
+        (
+            StatusCode::NOT_FOUND,
+            Json(json!({ "error": { "code": "not_found", "message": "Host not found" } })),
+        )
+    })
+}
+
 // ── GET /api/v1/hosts/:id/groups ──────────────────────────────────────────────
 
 async fn list_host_groups(

crates/pm-web/src/routes/jobs.rs

@@ -438,7 +438,7 @@ async fn cancel_job(
 
     // Only admin or the job creator may cancel.
     if !auth.role.can_write() {
-        let is_creator = creator_id.map_or(false, |cid| cid == auth.user_id);
+        let is_creator = creator_id == Some(auth.user_id);
         if !is_creator {
             return Err(err(
                 StatusCode::FORBIDDEN,

crates/pm-web/src/routes/settings.rs

@@ -115,6 +115,7 @@ pub struct OidcDiscoveryRequest {
 }
 
 #[derive(Debug, Serialize)]
+#[allow(dead_code)]
 pub struct OidcDiscoveryResult {
     pub issuer: String,
     pub authorization_endpoint: String,
@@ -558,7 +559,7 @@ async fn update_settings(
 // ============================================================
 
 async fn discover_oidc(
-    State(state): State<AppState>,
+    State(_state): State<AppState>,
     auth: AuthUser,
     Json(req): Json<OidcDiscoveryRequest>,
 ) -> Result<Json<Value>, (StatusCode, Json<Value>)> {

crates/pm-web/src/routes/sso.rs

@@ -95,22 +95,13 @@ pub struct OidcDiscovery {
 }
 
 /// Cache for OIDC discovery documents and JWKS with TTL-based refresh.
+#[derive(Default)]
 pub struct OidcCache {
     pub discovery: Option<OidcDiscovery>,
     pub jwks: Option<serde_json::Value>,
     pub jwks_fetched_at: Option<chrono::DateTime<Utc>>,
 }
 
-impl Default for OidcCache {
-    fn default() -> Self {
-        Self {
-            discovery: None,
-            jwks: None,
-            jwks_fetched_at: None,
-        }
-    }
-}
-
 /// JWKS cache TTL in seconds (1 hour).
 const JWKS_CACHE_TTL_SECS: i64 = 3600;
 /// Discovery cache TTL in seconds (1 hour).
@@ -492,10 +483,11 @@ async fn sso_callback(
                     DbUserForSso {
                         id: existing.id,
                         username: existing.username.clone(),
-                        display_name: name
-                            .is_empty()
-                            .then(|| existing.display_name.clone())
-                            .unwrap_or(name),
+                        display_name: if name.is_empty() {
+                            existing.display_name.clone()
+                        } else {
+                            name
+                        },
                         role: existing.role.clone(),
                         is_active: existing.is_active,
                         mfa_enabled: existing.mfa_enabled,

crates/pm-web/src/routes/ws.rs

@@ -13,7 +13,7 @@ use axum::{
 };
 use chrono::{Duration, Utc};
 use pm_auth::rbac::AuthUser;
-use serde::{Deserialize, Serialize};
+use serde::Deserialize;
 use serde_json::{json, Value};
 use sqlx::postgres::PgListener;
 use ulid::Ulid;
@@ -188,10 +188,8 @@ async fn handle_browser_ws(mut socket: WebSocket, db: sqlx::PgPool, ticket: WsTi
                         tracing::info!(user_id = %ticket.user_id, "Browser WS closed by client");
                         break;
                     }
-                    Some(Ok(Message::Ping(data))) => {
-                        if socket.send(Message::Pong(data)).await.is_err() {
-                            break;
-                        }
+                    Some(Ok(Message::Ping(data))) if socket.send(Message::Pong(data.clone())).await.is_err() => {
+                        break;
                     }
                     Some(Err(e)) => {
                         tracing::debug!(error = %e, user_id = %ticket.user_id, "Browser WS recv error");

crates/pm-worker/src/email.rs

@@ -9,7 +9,6 @@ use lettre::{
     transport::smtp::authentication::Credentials,
     AsyncSmtpTransport, AsyncTransport, Message, Tokio1Executor,
 };
-use serde_json;
 use sqlx::PgPool;
 
 use pm_core::audit::{log_event, AuditAction};
@@ -290,6 +289,7 @@ pub async fn send_job_completion_email(
 }
 
 /// Send a maintenance window reminder email.
+#[allow(dead_code)]
 pub async fn send_maintenance_window_reminder_email(
     pool: &PgPool,
     host_fqdn: &str,

crates/pm-worker/src/health_check_poller.rs

@@ -22,6 +22,7 @@ use pm_agent_client::{AgentClient, AgentClientError};
 
 /// Row fetched for each enabled health check, joined with host connection info.
 #[derive(FromRow)]
+#[allow(dead_code)]
 struct HealthCheckRow {
     id: Uuid,
     host_id: Uuid,

crates/pm-worker/src/maintenance_scheduler.rs

@@ -45,6 +45,7 @@ struct AutoApplyWindow {
 }
 
 #[derive(Debug, FromRow)]
+#[allow(dead_code)]
 struct PendingPatchHost {
     host_id: Uuid,
     patch_count: i32,

frontend/src/api/client.ts

@@ -152,6 +152,8 @@ export const hostsApi = {
   list: (params?: Record<string, unknown>) => apiClient.get('/hosts', { params }),
   get: (id: string) => apiClient.get(`/hosts/${id}`),
   register: (body: CreateHostRequest) => apiClient.post('/hosts', body),
+  update: (id: string, body: Record<string, string | undefined>) =>
+    apiClient.put(`/hosts/${id}`, body),
   delete: (id: string) => apiClient.delete(`/hosts/${id}`),
   refresh: (id: string) => apiClient.post(`/hosts/${id}/refresh`),
 }

frontend/src/pages/HostDetailPage.tsx

@@ -614,6 +614,46 @@ export default function HostDetailPage() {
   // Hosts list for target_host_id dropdown
   const [hosts, setHosts] = useState<{ id: string; display_name: string; fqdn: string }[]>([])
 
+  // ── Host editing state ────────────────────────────────────────────────────
+  const [editing, setEditing] = useState(false)
+  const [editFqdn, setEditFqdn] = useState('')
+  const [editIp, setEditIp] = useState('')
+  const [editDisplayName, setEditDisplayName] = useState('')
+  const [savingHost, setSavingHost] = useState(false)
+
+  const enterEdit = () => {
+    setEditFqdn(String(host?.fqdn ?? ''))
+    setEditIp(String(host?.ip_address ?? ''))
+    setEditDisplayName(String(host?.display_name ?? ''))
+    setEditing(true)
+  }
+
+  const cancelEdit = () => {
+    setEditing(false)
+    setSavingHost(false)
+  }
+
+  const handleSaveHost = async () => {
+    if (!id) return
+    setSavingHost(true)
+    try {
+      const res = await hostsApi.update(id, {
+        fqdn: editFqdn !== String(host?.fqdn ?? '') ? editFqdn : undefined,
+        ip_address: editIp !== String(host?.ip_address ?? '') ? editIp : undefined,
+        display_name: editDisplayName !== String(host?.display_name ?? '') ? editDisplayName : undefined,
+      })
+      setHost(res.data)
+      setEditing(false)
+      showSnack('Host updated', 'success')
+    } catch (e: unknown) {
+      const msg = (e as { response?: { data?: { error?: { message?: string } } } })
+        ?.response?.data?.error?.message ?? 'Failed to update host'
+      showSnack(msg, 'error')
+    } finally {
+      setSavingHost(false)
+    }
+  }
+
   // ── Fetch host ────────────────────────────────────────────────────────────
   useEffect(() => {
     if (id === 'new') { setLoading(false); return }
@@ -899,7 +939,39 @@ export default function HostDetailPage() {
             {String(host?.fqdn ?? '')}
           </Typography>
           <Box sx={{ display: 'flex', alignItems: 'center', gap: 1 }}>
-            {canWrite && !certExists && (
+            {canWrite && !editing && (
+              <Button
+                variant="outlined"
+                size="small"
+                startIcon={<EditIcon />}
+                onClick={enterEdit}
+              >
+                Edit
+              </Button>
+            )}
+            {canWrite && editing && (
+              <>
+                <Button
+                  variant="contained"
+                  size="small"
+                  startIcon={<CheckCircleIcon />}
+                  onClick={handleSaveHost}
+                  disabled={savingHost}
+                >
+                  {savingHost ? <CircularProgress size={16} /> : 'Save'}
+                </Button>
+                <Button
+                  variant="outlined"
+                  size="small"
+                  startIcon={<CancelIcon />}
+                  onClick={cancelEdit}
+                  disabled={savingHost}
+                >
+                  Cancel
+                </Button>
+              </>
+            )}
+            {!editing && canWrite && !certExists && (
               <Button
                 variant="contained"
                 size="small"
@@ -909,7 +981,7 @@ export default function HostDetailPage() {
                 Issue Certificate
               </Button>
             )}
-            {canWrite && certExists && (
+            {!editing && canWrite && certExists && (
               <Button
                 variant="outlined"
                 size="small"
@@ -920,21 +992,46 @@ export default function HostDetailPage() {
                 Re-issue Certificate
               </Button>
             )}
-
           </Box>
         </Box>
         <Divider sx={{ mb: 2 }} />
         <Grid container spacing={2}>
-          {host && Object.entries(host).map(([k, v]) =>
-            v !== null && v !== '' ? (
-              <Grid size={{ xs: 12, sm: 6, md: 4 }} key={k}>
-                <Typography variant="caption" color="text.secondary" display="block">
-                  {k.replace(/_/g, ' ').toUpperCase()}
-                </Typography>
-                <Typography variant="body2">{String(v)}</Typography>
-              </Grid>
-            ) : null
-          )}
+          {host && (<>
+            <Grid size={{ xs: 12, sm: 6, md: 4 }}>
+              <Typography variant="caption" color="text.secondary" display="block">FQDN</Typography>
+              {editing ? (
+                <TextField size="small" fullWidth value={editFqdn} onChange={e => setEditFqdn(e.target.value)} />
+              ) : (
+                <Typography variant="body2">{String(host.fqdn)}</Typography>
+              )}
+            </Grid>
+            <Grid size={{ xs: 12, sm: 6, md: 4 }}>
+              <Typography variant="caption" color="text.secondary" display="block">IP ADDRESS</Typography>
+              {editing ? (
+                <TextField size="small" fullWidth value={editIp} onChange={e => setEditIp(e.target.value)} />
+              ) : (
+                <Typography variant="body2">{String(host.ip_address)}</Typography>
+              )}
+            </Grid>
+            <Grid size={{ xs: 12, sm: 6, md: 4 }}>
+              <Typography variant="caption" color="text.secondary" display="block">DISPLAY NAME</Typography>
+              {editing ? (
+                <TextField size="small" fullWidth value={editDisplayName} onChange={e => setEditDisplayName(e.target.value)} />
+              ) : (
+                <Typography variant="body2">{String(host.display_name)}</Typography>
+              )}
+            </Grid>
+            {Object.entries(host).filter(([k]) => !['fqdn','ip_address','display_name'].includes(k)).map(([k, v]) =>
+              v !== null && v !== '' ? (
+                <Grid size={{ xs: 12, sm: 6, md: 4 }} key={k}>
+                  <Typography variant="caption" color="text.secondary" display="block">
+                    {k.replace(/_/g, ' ').toUpperCase()}
+                  </Typography>
+                  <Typography variant="body2">{String(v)}</Typography>
+                </Grid>
+              ) : null
+            )}
+          </>)}
         </Grid>
       </Paper>
 

frontend/src/types/index.ts

@@ -37,6 +37,12 @@ export interface CreateHostRequest {
   group_ids?: string[]
 }
 
+export interface UpdateHostRequest {
+  fqdn?: string
+  ip_address?: string
+  display_name?: string
+}
+
 export interface Group {
   id: string
   name: string

migrations/018_add_hostname_to_enrollment.sql

@@ -0,0 +1,3 @@
+-- Migration: 018_add_hostname_to_enrollment
+-- Add hostname column to enrollment_requests for proper display name
+ALTER TABLE enrollment_requests ADD COLUMN IF NOT EXISTS hostname TEXT;