Fix .lan NXDOMAIN for custom hostnames (pbx.lan, nas.lan, etc.)

After the Unbound/:53 + ctrld/:5354 architecture change, fix-lan-zone
wrote local-lan-zone.conf with only 'local-zone: "lan." static' and no
local-data records.  Unbound then returned NXDOMAIN for every .lan name
not explicitly listed — including pbx.lan and any hostname in
local-hostnames.json — because the static zone intercepts all .lan
queries before they can reach dnsmasq.

Fix:
- Add _build_unbound_lan_zone_conf(entries, mgmt_ip) which builds a
  complete local-lan-zone.conf: the static zone declaration plus
  local-data A records for every entry in local-hostnames.json and the
  two built-in management aliases (switch.mgmt.lan, management.lan).
- Update fix-lan-zone to use this helper instead of the bare zone-only
  string.  Running fix-lan-zone now also pushes all saved hostnames.
- Update save_local_hostnames to push the updated local-lan-zone.conf
  to Unbound via SSH and reload if OPNsense SSH is configured, so
  adding/editing hostnames in the DNS tab takes effect immediately
  without a separate fix-lan-zone call.

https://claude.ai/code/session_01JR2EMK7rwrZJowpstcaxQ6

switch_backend.py

@@ -2853,6 +2853,29 @@ def _generate_dnsmasq_conf(entries: list, mgmt_ip: str = "192.168.99.50") -> str
     return "\n".join(lines) + "\n"
 
 
+def _build_unbound_lan_zone_conf(entries: list, mgmt_ip: str = "192.168.99.50") -> str:
+    """
+    Build the full local-lan-zone.conf for Unbound.
+
+    Declares 'lan.' as a static zone (so .lan never leaks to ControlD) and
+    adds local-data A records for every entry in local-hostnames.json plus
+    the two built-in management aliases.  Without these local-data lines every
+    .lan name that isn't listed gets NXDOMAIN — including pbx.lan and any
+    other custom hostname the user defined.
+    """
+    lines = ['local-zone: "lan." static', ""]
+    # Management PC aliases — always present
+    for alias in ("switch.mgmt.lan", "management.lan"):
+        lines.append(f'local-data: "{alias}. A {mgmt_ip}"')
+    # User-defined entries from local-hostnames.json
+    for e in entries:
+        name = e.get("name", "").strip().rstrip(".")
+        ip   = e.get("ip", "").strip()
+        if name and ip:
+            lines.append(f'local-data: "{name}. A {ip}"')
+    return "\n".join(lines) + "\n"
+
+
 def _generate_ctrld_split_horizon_block(local_domain: str = "lan",
                                         dnsmasq_port: int = 5353) -> str:
     """
@@ -2955,6 +2978,21 @@ def save_local_hostnames(body: LocalHostnamesUpdate):
         local_domain=body.local_domain or "lan"
     )
 
+    # Push local-data records into Unbound on OPNsense if SSH is configured.
+    # Without this, Unbound's static lan. zone returns NXDOMAIN for any
+    # custom .lan hostname (pbx.lan, nas.lan, etc.) that isn't explicitly
+    # listed — even though they exist in dnsmasq.
+    unbound_push = None
+    try:
+        opn_cfg = _load_opnsense_cfg()
+        if opn_cfg.get("ssh_key_path"):
+            lan_zone_conf = _build_unbound_lan_zone_conf(entries, mgmt_ip)
+            _opnsense_sftp_write(opn_cfg, f"{UNBOUND_ETC}/local-lan-zone.conf", lan_zone_conf)
+            _opnsense_ssh_run(opn_cfg, "unbound-control reload 2>&1")
+            unbound_push = f"Pushed {len(entries)} local-data record(s) to Unbound and reloaded"
+    except Exception as _upe:
+        unbound_push = f"Unbound push skipped: {_upe}"
+
     return {
         "success":         True,
         "entries":         entries,
@@ -2962,6 +3000,7 @@ def save_local_hostnames(body: LocalHostnamesUpdate):
         "conf_path":       str(DNSMASQ_CONF_PATH),
         "split_horizon":   split_horizon,
         "full_toml":       split_horizon_toml,
+        "unbound_push":    unbound_push,
         "docker_compose_snippet": (
             "  dnsmasq:\n"
             "    image: andyshinn/dnsmasq:latest\n"
@@ -3541,11 +3580,21 @@ def opnsense_unbound_fix_lan_zone():
         raise HTTPException(503, "OPNsense SSH not configured")
     steps = []
     errors = []
-    # Write the correct local-lan-zone.conf via SFTP
-    lan_zone_conf = 'local-zone: "lan." static\n'
+    # Build local-lan-zone.conf with all local-data records so custom .lan
+    # hostnames (pbx.lan, nas.lan, etc.) resolve correctly from Unbound.
+    import socket as _sock2
+    try:
+        mgmt_ip = _sock2.gethostbyname(_sock2.gethostname())
+    except Exception:
+        mgmt_ip = "192.168.99.50"
+    entries = _load_local_hostnames()
+    lan_zone_conf = _build_unbound_lan_zone_conf(entries, mgmt_ip)
     try:
         _opnsense_sftp_write(cfg, f"{UNBOUND_ETC}/local-lan-zone.conf", lan_zone_conf)
-        steps.append("Wrote local-lan-zone.conf: local-zone \"lan.\" static")
+        steps.append(
+            f"Wrote local-lan-zone.conf: local-zone \"lan.\" static + "
+            f"{len(entries)} local-data record(s)"
+        )
     except Exception as e:
         errors.append(f"Write local-lan-zone.conf: {e}")
         raise HTTPException(500, "; ".join(errors))