Custom connections are gone: the CLI talks to the LLeMbas server it is logged in to

LLeMbas CLI 2.0 is LLeMbas-server-specific (CLI rule 2). Removed: the
anthropic, gemini, ollama and responses clients, context discovery and
llama-swap unloading (discover.ts), the Connection schema with its dialect,
auth, key_cmd, discover, unload_url and one_model_at_a_time, the model
`fallback` (it only ever moved to another server), effort_map and cache, and
the multi-connection refs. Kept: openai-chat, http, sse, think, effort,
tokens and all of src/lembas.

- connections.yaml holds the login (`type: webui`, as lembas login writes
  it). A custom entry from 1.x is read past with a warning that says how to
  log in, so an old file still starts; with several logins left, the latest
  is used and the others named.
- A model's ref is the id the server serves it under; the older forms
  (`<login>/<id>`, `<login>/<model>`) still resolve and config.yaml is
  rewritten once. Without a login there is no model, and the error (and the
  first-run screen, now the sign-in alone) says `lembas login <address>`.
- A login to another server signs this machine out of the previous one.
- The window is the server's word (no discovery); a capacity group comes
  from the server's `capacity.group` alone; embeddings use the server's
  /v1/embeddings.
- `lembas models` lists the server's models; install.sh's starter files, the
  README and the JSON schemas say the same.

Tests: every fixture is a login now (the fake server lists models, answers
other GETs with 404, and can hand one model to another script, as a server
with several backends); the dialect suites and the cross-connection tests are
gone with their code.

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

scripts/smoke.ts

@@ -26,11 +26,11 @@ const v = run(["--version"])
 check("--version", v.code === 0 && /^\d+\.\d+\.\d+/.test(v.out), v.err)
 
 // 2. a headless run against a fake endpoint, with the session store on (FTS5 inside the binary)
-const fake = fakeProvider([{ chunks: [delta({ content: "smoke ok" }), usage(5, 2)] }])
+const fake = fakeProvider([{ chunks: [delta({ content: "smoke ok" }), usage(5, 2)] }], { served: [{ id: "fake/m" }] })
 mkdirSync(join(home, ".config/lembas"), { recursive: true })
 writeFileSync(
   join(home, ".config/lembas/connections.yaml"),
-  `connections:\n  fake:\n    dialect: openai-chat\n    base_url: ${fake.url}\n    models:\n      m: {}\n`,
+  `connections:\n  fake:\n    type: webui\n    url: ${fake.url}\n    api_key: smoke\n    models:\n      fake/m: {}\n`,
   { mode: 0o600 },
 )
 writeFileSync(join(home, ".config/lembas/config.yaml"), "model: fake/m\nupdate: { auto: off }\n")
@@ -46,10 +46,10 @@ check("sessions → recorded (sqlite + FTS5 in the binary)", s.code === 0 && s.o
 // 2b. serve --stdio: the ACP agent inside the binary answers initialize, opens a session and
 // streams a reply — the code the LLeMbas link runs too.
 {
-  const f = fakeProvider([{ chunks: [delta({ content: "acp ok" })] }])
+  const f = fakeProvider([{ chunks: [delta({ content: "acp ok" })] }], { served: [{ id: "fake/m" }] })
   writeFileSync(
     join(home, ".config/lembas/connections.yaml"),
-    `connections:\n  fake:\n    dialect: openai-chat\n    base_url: ${f.url}\n    models:\n      m: {}\n`,
+    `connections:\n  fake:\n    type: webui\n    url: ${f.url}\n    api_key: smoke\n    models:\n      fake/m: {}\n`,
     { mode: 0o600 },
   )
   const p = Bun.spawn([bin, "serve", "--stdio"], { cwd: home, env, stdin: "pipe", stdout: "pipe", stderr: "pipe" })
@@ -181,7 +181,7 @@ for (const [cols, rows] of [
   const d = await drive({ cols: 100, rows: 30, bin, home: h, cwd })
   await d.waitFor("Trust this directory?")
   await d.key("\r")
-  const setup = await d.waitFor("no model to talk to yet")
+  const setup = await d.waitFor("not logged in to a LLeMbas server")
   await Bun.write(join(cfgDir, "connections.yaml"), connections)
   await Bun.write(join(cfgDir, "config.yaml"), "model: fake/coder\nupdate: { auto: off }\n")
   // The screen opens on the sign-in, its address focused: ctrl+r tries again from there.