Add server hardware/network detail view with Proxmox sync and agent reporting

Servers & Tasks only tracked scheduled tasks — there was no overview of
the servers themselves and no way to see CPU/RAM/disk/IP info. Add a
clickable server overview (visible to every role, not just admins) that
opens a per-server detail page.

- servers table gains an agent-reported hardware/network snapshot
  (IPs, CPU model/cores/load, memory, disks) and an optional link to a
  Proxmox VM/LXC (integration + node + guest type + vmid).
- Proxmox adapter gains getGuestDetail(): live cores/memory/disk from
  /config, live cpu/mem/uptime from /status/current, and IPs (LXC net
  config directly, QEMU via a best-effort guest-agent call that degrades
  gracefully when the agent isn't installed).
- New GET /api/servers/:id/detail combines whichever hardware source
  applies (live Proxmox vs. last agent report) with a DNS reverse-lookup
  against the DNS module's own record cache, so matching hostnames show
  up next to each IP. New PATCH /api/servers/:id manages the Proxmox
  link.
- agent/linux/report-tasks.sh now also collects and reports IPs,
  CPU/memory/disk info on every check-in (load-average-based CPU number,
  not instantaneous, to keep the agent a cheap oneshot).
- Extracted the per-server task table into a shared ServerTaskTable
  component so the all-servers view and the new detail page render
  tasks identically.

Verified server-side end-to-end against the real dev server (agent
report -> detail endpoint -> DNS match) and the Proxmox adapter against
a mock HTTPS server covering LXC/QEMU config parsing and the
guest-agent-unavailable fallback.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

server/src/db/schema.ts

@@ -1,5 +1,5 @@
 import { sql } from "drizzle-orm";
-import { sqliteTable, text, integer, uniqueIndex } from "drizzle-orm/sqlite-core";
+import { sqliteTable, text, integer, real, uniqueIndex } from "drizzle-orm/sqlite-core";
 
 // ─── Users & roles ──────────────────────────────────────────────────────────
 
@@ -150,6 +150,9 @@ export const dnsRecordsCache = sqliteTable("dns_records_cache", {
 
 // ─── Servers & scheduled tasks (ported from Schedule Task Manager) ─────────
 
+export const proxmoxGuestTypes = ["qemu", "lxc"] as const;
+export type ProxmoxGuestTypeCol = (typeof proxmoxGuestTypes)[number];
+
 export const servers = sqliteTable("servers", {
   id: integer("id").primaryKey({ autoIncrement: true }),
   name: text("name").notNull(),
@@ -162,6 +165,23 @@ export const servers = sqliteTable("servers", {
     .notNull()
     .default(sql`(current_timestamp)`),
   lastSeenAt: text("last_seen_at"),
+
+  // Agent-reported hardware/network snapshot — updated on every agent report.
+  ipAddresses: text("ip_addresses"), // JSON string[]
+  cpuModel: text("cpu_model"),
+  cpuCores: integer("cpu_cores"),
+  cpuLoadPercent: real("cpu_load_percent"),
+  memTotalBytes: integer("mem_total_bytes"),
+  memUsedBytes: integer("mem_used_bytes"),
+  disks: text("disks"), // JSON string: {mount, sizeBytes, usedBytes}[]
+
+  // Optional link to a Proxmox VM/LXC — set by an admin, not the agent.
+  proxmoxIntegrationId: integer("proxmox_integration_id").references(() => integrations.id, {
+    onDelete: "set null",
+  }),
+  proxmoxNode: text("proxmox_node"),
+  proxmoxGuestType: text("proxmox_guest_type").$type<ProxmoxGuestTypeCol>(),
+  proxmoxVmid: integer("proxmox_vmid"),
 });
 
 export const scheduledTasks = sqliteTable("scheduled_tasks", {