Split view, personal modes, budget warnings, server move script

- Up to three chats side by side (#/s/a+b+c), "Open beside" in the sidebar menu
- File manager tabs of a chat stored per user on the server (/sessions/{id}/tabs)
- Personal modes for every user (Settings → My modes, /account/modes)
- Budget meters (total, provider, images, opencode Go windows) with push warnings
  for admins at the warning share and 100 %, shown in the status overlay
- scripts/move-server.sh: move to another Docker host with bind mounts (Unraid);
  scripts/smoke-test.sh

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/components/settings/AgentsEditor.tsx

@@ -9,14 +9,14 @@ import { confirmDialog, promptDialog, toast } from "../../dialogs";
 
 type Patch = { path: string[]; value: unknown };
 
-interface ToolInfo {
+export interface ToolInfo {
   name: string;
   read_only: boolean;
   description: string;
 }
 
 /** Tool checkboxes: nothing checked = all tools. */
-function ToolPicker({ tools, value, onChange, readOnly }: { tools: ToolInfo[]; value: string[]; onChange: (v: string[]) => void; readOnly: boolean }) {
+export function ToolPicker({ tools, value, onChange, readOnly }: { tools: ToolInfo[]; value: string[]; onChange: (v: string[]) => void; readOnly: boolean }) {
   const t = useT();
   const toggle = (n: string) => onChange(value.includes(n) ? value.filter((x) => x !== n) : [...value, n]);
   // Names configured by hand (e.g. MCP patterns) stay selected even if not listed.
@@ -211,7 +211,9 @@ function AgentRow({ a, raw, tools, onSaved }: { a: AgentInfo; raw: any; tools: T
 
 export function AgentsEditor({ rawAgents, reloadConfig }: { rawAgents: Record<string, any>; reloadConfig: () => void }) {
   const t = useT();
-  const { data: agents, reload } = useFetch<AgentInfo[]>("/agents");
+  const { data: all, reload } = useFetch<AgentInfo[]>("/agents");
+  // Personal modes are managed under "My modes".
+  const agents = all?.filter((a) => a.source !== "personal");
   const tools = useFetch<ToolInfo[]>("/agents/tools").data ?? [];
   const cmds = useFetch<{ commands: any[]; skills: any[] }>("/commands").data;
   const [notice, setNotice] = useState<{ ok: boolean; text: string }>();