feat: v2.5.5 — AI Router renamed AI Proxy, reload onto new builds, update no longer spins

AI Proxy (was AI Router):
- server/lib/ai-proxies.js, proxy-apply.js, routes/ai-proxies.js mounted at
  /api/ai-proxies and the old /api/ai-routers; `router` still accepted on the
  start routes; profiles move to <CLAUDE_HOME>/agenthub-proxies/
- dashboard_runs.router renamed in place to proxy: an older build on the same
  DB fails on that column, so dev and prod sharing one DB update together
- a proxy's baseUrl stored as its root (a typed /v1 made /v1/v1/messages);
  Test probes Claude /v1/messages and Codex /v1/responses
- Settings → AI Proxy (/settings/ai-router redirects), ProxyPicker

Updates:
- every tab reloads onto the new UI build when its WebSocket reconnects to a
  server of another version (lib/newBuildReload.ts, once per version)
- Update now stops waiting on a plugin chain that failed or pulled nothing
  (the old server never goes down), and reloads as soon as a new version answers

Also:
- a pane whose command exits at once says so (EPANEEXITED) instead of
  "Command failed: tmux set-option … mouse on"
- the pane drag preview draws where the pane actually lands

client/src/components/lanes/__tests__/AddLaneModal.test.tsx

@@ -31,7 +31,7 @@ vi.mock("../../../lib/api", () => ({
       profileInit: vi.fn(),
       mcpSync: vi.fn(),
     },
-    aiRouters: { list: vi.fn() },
+    aiProxies: { list: vi.fn() },
     aiTools: { list: vi.fn(), iconUrl: (id: string) => `/api/ai-tools/${id}/icon` },
     run: { start: vi.fn() },
   },
@@ -50,7 +50,7 @@ const tool = (id: string, label: string, over: Partial<AiTool> = {}): AiTool =>
   prompt: { mode: "argv" },
   resume: false,
   bypass: false,
-  routerCapable: false,
+  proxyCapable: false,
   install: null,
   update: null,
   modelFlag: false,
@@ -62,8 +62,8 @@ const tool = (id: string, label: string, over: Partial<AiTool> = {}): AiTool =>
 const TOOLS: AiToolsView = {
   default: "claude",
   tools: [
-    tool("claude", "Claude Code", { launcher: "claude", routerCapable: true, prompt: null }),
-    tool("codex", "Codex", { launcher: "codex", routerCapable: true, prompt: null }),
+    tool("claude", "Claude Code", { launcher: "claude", proxyCapable: true, prompt: null }),
+    tool("codex", "Codex", { launcher: "codex", proxyCapable: true, prompt: null }),
     tool("gemini", "Gemini"),
     tool("aider", "Aider", { installed: false, path: null }),
     tool("grok", "Grok", { enabled: false }),
@@ -158,7 +158,7 @@ beforeEach(() => {
     .mockReset()
     .mockResolvedValue({ scaffolded: false, reason: "no detectable Node.js project" });
   vi.mocked(api.lanes.mcpSync).mockReset().mockResolvedValue({ servers: [], profilesSeeded: [] });
-  vi.mocked(api.aiRouters.list).mockReset();
+  vi.mocked(api.aiProxies.list).mockReset();
 });
 
 describe("AddLaneModal — picking an existing branch (issue #34)", () => {
@@ -639,12 +639,12 @@ describe("AddLaneModal — create/update readme", () => {
   });
 });
 
-describe("AddLaneModal — no router here", () => {
-  it("asks for no AI Router: a new session picks its own", async () => {
+describe("AddLaneModal — no proxy here", () => {
+  it("asks for no AI Proxy: a new session picks its own", async () => {
     renderModal({});
     await screen.findByRole("button", { name: /Claude Code.*Default/ });
-    expect(screen.queryByRole("radio", { name: "AI Router" })).toBeNull();
-    expect(api.aiRouters.list).not.toHaveBeenCalled();
+    expect(screen.queryByRole("radio", { name: "AI Proxy" })).toBeNull();
+    expect(api.aiProxies.list).not.toHaveBeenCalled();
   });
 });