feat: P2.9 VNCtalk + P2.10 Collabora + P2.11 Calendar Enhancements + P2.13 VNCdirectory Admin

- P2.9: VNCtalk video meeting — create/update meeting from event modal,
  'Join Meeting' link in event detail. Admin config vnctalkServerUrl.
- P2.10: Collabora online editing — 'Edit with Collabora' for office files,
  WOPI discovery + edit URL. Admin config collaboraServerUrl.
- P2.11: Calendar enhancements — clickable links in descriptions,
  participant contact popover, Reply/Reply All from event, timezone picker,
  map links for locations.
- P2.13: VNCdirectory IDP admin panel — Connection, SAML/IDP, LDAP,
  Authentication, Federated Apps configuration. Secret masking on display.

app/api/vnctalk/meeting/route.ts

@@ -0,0 +1,49 @@
+import { NextRequest, NextResponse } from "next/server";
+import { createVncMeeting } from "@/lib/vnctalk/client";
+import { logger } from "@/lib/logger";
+
+function getClientIP(request: NextRequest): string {
+  const forwarded = request.headers.get("x-forwarded-for");
+  if (forwarded) return forwarded.split(",")[0].trim();
+  return "127.0.0.1";
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const body = await request.json();
+
+    if (!body.name || !body.start || !body.end) {
+      return NextResponse.json(
+        { error: "Missing required fields: name, start, end" },
+        { status: 400 }
+      );
+    }
+
+    const invitees: string[] = Array.isArray(body.invitees) ? body.invitees : [];
+
+    const result = await createVncMeeting({
+      name: String(body.name),
+      start: String(body.start),
+      end: String(body.end),
+      invitees,
+      password: body.password ? String(body.password) : undefined,
+      description: body.description ? String(body.description) : undefined,
+    });
+
+    logger.info("VNCtalk meeting created", {
+      meetingId: result.meetingId,
+      ip: getClientIP(request),
+    });
+
+    return NextResponse.json(result, { status: 201 });
+  } catch (error) {
+    const message = error instanceof Error ? error.message : "Unknown error";
+    logger.error("VNCtalk meeting creation failed", { error: message });
+
+    if (message.includes("not configured")) {
+      return NextResponse.json({ error: message }, { status: 503 });
+    }
+
+    return NextResponse.json({ error: message }, { status: 500 });
+  }
+}