Fix displaysubnet.asp PC lookup to use Phase 2 schema

The PC IP lookup was using the deprecated pc_network_interfaces table
which no longer exists. Updated to use the communications table and
machines table with proper Phase 2 joins.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

displaysubnet.asp

@@ -43,17 +43,19 @@
 		rsPrinterCheck.Close
 		Set rsPrinterCheck = Nothing
 
-		' Check if this IP belongs to a PC
+		' Check if this IP belongs to a PC (Phase 2: uses communications table)
 		Dim rsPCCheck, strPCSQL
-		strPCSQL = "SELECT pcid FROM pc_network_interfaces WHERE ipaddress = ?"
+		strPCSQL = "SELECT m.machineid FROM machines m " & _
+				"INNER JOIN communications c ON m.machineid = c.machineid " & _
+				"WHERE c.address = ? AND m.pctypeid IS NOT NULL AND c.isactive = 1"
 		Set rsPCCheck = ExecuteParameterizedQuery(objConn, strPCSQL, Array(search))
 		IF NOT rsPCCheck.EOF THEN
 			Dim pcRedirectId
-			pcRedirectId = rsPCCheck("pcid")
+			pcRedirectId = rsPCCheck("machineid")
 			rsPCCheck.Close
 			Set rsPCCheck = Nothing
 			objConn.Close
-			Response.Redirect("./displaypc.asp?pcid=" & pcRedirectId)
+			Response.Redirect("./displaypc.asp?machineid=" & pcRedirectId)
 			Response.End
 		END IF
 		rsPCCheck.Close