Add per-server admin-page links (Dockge, Webmin, Cockpit, etc.)

Each server's detail page gets an "Admin Links" card for bookmarking
that host's own web UIs -- container managers, Webmin, Cockpit, or
anything else reachable by URL -- so there's a quick way to jump
there without hunting down the address each time.

New server_links table (serverId FK, label, url, ON DELETE CASCADE so
removing a server cleans up its links automatically) and three new
routes: POST/PATCH/DELETE /api/servers/:id/links, gated to operator+
like the rest of this page's editing actions; the existing GET
/:id/detail now includes the server's links alongside hardware/DNS
info. URLs are validated to start with http:// or https:// server-side
(rejecting e.g. a javascript: URL that would otherwise render as a
clickable link).

Rendered as a row of pill buttons (label opens the URL in a new tab),
with inline edit/remove controls next to each when the viewer can
edit, and an "Add link" form matching the existing task-form style on
the same page.

Verified against a temp SQLite DB with real migrations: create/list/
update/delete all work, and deleting the parent server cascades to
remove its links rather than leaving them orphaned.

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

web/src/api/client.ts

@@ -249,11 +249,18 @@ export interface DnsMatch {
   providerType: string;
 }
 
+export interface ServerLink {
+  id: number;
+  label: string;
+  url: string;
+}
+
 export interface ServerDetail {
   server: ServerRecord;
   ipAddresses: string[];
   hardware: ServerHardware;
   dnsMatches: DnsMatch[];
+  links: ServerLink[];
 }
 
 export interface ServerUpdateInput {
@@ -631,6 +638,12 @@ export const api = {
       request<{ server: ServerRecord }>(`/api/servers/${id}`, { method: "PATCH", body: JSON.stringify(data) }),
     detail: (id: number) => request<ServerDetail>(`/api/servers/${id}/detail`),
     remove: (id: number) => request<void>(`/api/servers/${id}`, { method: "DELETE" }),
+    addLink: (id: number, data: { label: string; url: string }) =>
+      request<{ link: ServerLink }>(`/api/servers/${id}/links`, { method: "POST", body: JSON.stringify(data) }),
+    updateLink: (id: number, linkId: number, data: { label?: string; url?: string }) =>
+      request<{ link: ServerLink }>(`/api/servers/${id}/links/${linkId}`, { method: "PATCH", body: JSON.stringify(data) }),
+    removeLink: (id: number, linkId: number) =>
+      request<void>(`/api/servers/${id}/links/${linkId}`, { method: "DELETE" }),
   },
   tasks: {
     list: (