feat: 品牌替换 + 启动优化 + AGENTS.md 模板定制

- 品牌替换：OpenCode/opencode → AirCoding/aircoding（16+ 文件）
- Logo ASCII art：修复 left/right 行数不匹配导致的启动崩溃
- 启动诊断：添加 OPENCODE_PRINT_TIMING 计时探针
- dev 模式默认 --pure 跳过外部插件加载
- AGENTS.md 模板：追加 AirCoding 多 Agent 专项段落
- architect prompt + plugin：强化 AGENTS.md 产出验证

packages/tui/test/keymap.test.tsx

@@ -0,0 +1,141 @@
+/** @jsxImportSource @opentui/solid */
+import { createDefaultOpenTuiKeymap } from "@opentui/keymap/opentui"
+import { createBindingLookup } from "@opentui/keymap/extras"
+import { testRender, useRenderer } from "@opentui/solid"
+import { expect, test } from "bun:test"
+import { onCleanup } from "solid-js"
+import { TuiKeybind } from "../src/config/keybind"
+import { getOpencodeModeStack, OPENCODE_BASE_MODE, OpencodeKeymapProvider, registerOpencodeKeymap } from "../src/keymap"
+
+function createResolvedKeymapConfig(input: TuiKeybind.KeybindOverrides = {}) {
+  const keybinds = TuiKeybind.parse(input)
+  return {
+    keybinds: createBindingLookup(TuiKeybind.toBindingConfig(keybinds), {
+      commandMap: TuiKeybind.CommandMap,
+      bindingDefaults: TuiKeybind.bindingDefaults(),
+    }),
+    leader_timeout: 2000,
+  }
+}
+
+test("legacy page key aliases compile as page keys", async () => {
+  const sequences: Record<string, string[][]> = {}
+
+  function Harness() {
+    const renderer = useRenderer()
+    const keymap = createDefaultOpenTuiKeymap(renderer)
+    const config = createResolvedKeymapConfig({
+      messages_page_up: "pgup",
+      messages_page_down: "pgdown",
+    })
+    const offKeymap = registerOpencodeKeymap(keymap, renderer, config)
+    const offLayer = keymap.registerLayer({
+      bindings: config.keybinds.gather("session", ["session.page.up", "session.page.down"]),
+    })
+    const bindings = keymap.getCommandBindings({
+      visibility: "registered",
+      commands: ["session.page.up", "session.page.down"],
+    })
+    sequences.up =
+      bindings.get("session.page.up")?.map((binding) => binding.sequence.map((part) => part.stroke.name)) ?? []
+    sequences.down =
+      bindings.get("session.page.down")?.map((binding) => binding.sequence.map((part) => part.stroke.name)) ?? []
+    onCleanup(() => {
+      offLayer()
+      offKeymap()
+    })
+
+    return (
+      <OpencodeKeymapProvider keymap={keymap}>
+        <box />
+      </OpencodeKeymapProvider>
+    )
+  }
+
+  const app = await testRender(() => <Harness />)
+  try {
+    expect(sequences).toEqual({
+      up: [["pageup"]],
+      down: [["pagedown"]],
+    })
+  } finally {
+    app.renderer.destroy()
+  }
+})
+
+test("mode-less bindings stay active when opencode mode changes", async () => {
+  const counts: Record<string, Record<string, number>> = {}
+
+  function Harness() {
+    const renderer = useRenderer()
+    const keymap = createDefaultOpenTuiKeymap(renderer)
+    const config = createResolvedKeymapConfig()
+    const offKeymap = registerOpencodeKeymap(keymap, renderer, config)
+    const offGlobal = keymap.registerLayer({
+      commands: [
+        { name: "session.list", run() {} },
+        { name: "session.new", run() {} },
+        { name: "session.page.up", run() {} },
+        { name: "session.first", run() {} },
+      ],
+      bindings: config.keybinds.gather("test.global", [
+        "session.list",
+        "session.new",
+        "session.page.up",
+        "session.first",
+      ]),
+    })
+    const offBase = keymap.registerLayer({
+      mode: OPENCODE_BASE_MODE,
+      commands: [{ name: "model.list", run() {} }],
+      bindings: config.keybinds.gather("test.base", ["model.list"]),
+    })
+    const activeCounts = () =>
+      Object.fromEntries(
+        Array.from(
+          keymap.getCommandBindings({
+            visibility: "active",
+            commands: ["session.list", "session.new", "session.page.up", "session.first", "model.list"],
+          }),
+          ([command, bindings]) => [command, bindings.length],
+        ),
+      )
+
+    counts.base = activeCounts()
+    const popQuestion = getOpencodeModeStack(keymap).push("question")
+    counts.question = activeCounts()
+    popQuestion()
+    const popAutocomplete = getOpencodeModeStack(keymap).push("autocomplete")
+    counts.autocomplete = activeCounts()
+    popAutocomplete()
+
+    onCleanup(() => {
+      offBase()
+      offGlobal()
+      offKeymap()
+    })
+
+    return (
+      <OpencodeKeymapProvider keymap={keymap}>
+        <box />
+      </OpencodeKeymapProvider>
+    )
+  }
+
+  const app = await testRender(() => <Harness />)
+  try {
+    expect(counts).toEqual({
+      base: { "session.list": 1, "session.new": 1, "session.page.up": 2, "session.first": 2, "model.list": 1 },
+      question: { "session.list": 1, "session.new": 1, "session.page.up": 2, "session.first": 2, "model.list": 0 },
+      autocomplete: {
+        "session.list": 1,
+        "session.new": 1,
+        "session.page.up": 2,
+        "session.first": 2,
+        "model.list": 0,
+      },
+    })
+  } finally {
+    app.renderer.destroy()
+  }
+})