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/StatusLeds.tsx

@@ -1,10 +1,10 @@
 import { useCallback, useEffect, useRef, useState } from "react";
 import { get, post } from "../api";
-import { fmtPercent, useT, type Key } from "../i18n";
+import { fmtCost, fmtPercent, useT, type Key } from "../i18n";
 import { navigate } from "../router";
 import { useStore } from "../store";
 import { Icon } from "./Icon";
-import type { Plan } from "./Budget";
+import { Bar, type Plan } from "./Budget";
 
 type Level = "ok" | "warn" | "err" | "off";
 
@@ -21,12 +21,25 @@ interface McpEntry {
   tools?: number;
   error?: string | null;
 }
+interface Meter {
+  key: string;
+  provider: string;
+  kind: "total" | "provider" | "images" | "5h" | "week" | "month";
+  used: number;
+  limit: number;
+  ratio: number;
+}
 interface Overview {
   version: string;
   providers: Record<string, ProviderState>;
   mcp: Record<string, McpEntry>;
+  /** Budgets and plan windows (admins only). */
+  budgets?: Meter[];
+  currency?: string;
 }
 
+const meterLevel = (m: Meter): Level => (m.ratio >= 1 ? "err" : m.ratio >= 0.8 ? "warn" : "ok");
+
 const POLL_MS = 30_000;
 /** A dropped connection shows yellow (reconnecting) for this long, then red. */
 const RECONNECT_GRACE_MS = 10_000;
@@ -197,6 +210,22 @@ export function StatusLeds() {
             ))}
           </div>
 
+          {!!data?.budgets?.length && (
+            <div className="status-section">
+              <div className="status-head">
+                <Led level={combine(data.budgets.map(meterLevel))} /> {t("status.budgets")}
+              </div>
+              {data.budgets.map((m) => (
+                <div key={m.key} className="status-row status-meter" title={`${fmtCost(m.used, data.currency ?? "USD")} / ${fmtCost(m.limit, data.currency ?? "USD")}`}>
+                  <Led level={meterLevel(m)} />
+                  <span className="grow">{m.kind === "total" ? t("stats.total") : m.kind === "images" ? t("nav.images") : m.kind === "provider" ? m.provider : `${m.provider} · ${t(`budget.window.${m.kind}` as Key)}`}</span>
+                  <Bar share={m.ratio} warning={m.ratio >= 0.8} exceeded={m.ratio >= 1} />
+                  <span className="hint pct">{fmtPercent(m.ratio)}</span>
+                </div>
+              ))}
+            </div>
+          )}
+
           {admin && (
             <div className="status-foot">
               <button className="small ghost" onClick={() => go("providers")}>