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/server/src/handlers/message.ts

@@ -0,0 +1,84 @@
+import { SessionMessage } from "@opencode-ai/core/session/message"
+import { SessionV2 } from "@opencode-ai/core/session"
+import { Effect, Schema } from "effect"
+import { HttpApiBuilder } from "effect/unstable/httpapi"
+import { Api } from "../api"
+import { InvalidCursorError, SessionNotFoundError, UnknownError } from "../errors"
+
+const DefaultMessagesLimit = 50
+
+const Cursor = Schema.Struct({
+  id: SessionMessage.ID,
+  order: Schema.Union([Schema.Literal("asc"), Schema.Literal("desc")]),
+  direction: Schema.Union([Schema.Literal("previous"), Schema.Literal("next")]),
+})
+
+const decodeCursor = Schema.decodeUnknownSync(Cursor)
+
+const cursor = {
+  encode(message: SessionMessage.Message, order: "asc" | "desc", direction: "previous" | "next") {
+    return Buffer.from(JSON.stringify({ id: message.id, order, direction })).toString("base64url")
+  },
+  decode(input: string) {
+    return decodeCursor(JSON.parse(Buffer.from(input, "base64url").toString("utf8")))
+  },
+}
+
+export const MessageHandler = HttpApiBuilder.group(Api, "server.message", (handlers) =>
+  Effect.gen(function* () {
+    const session = yield* SessionV2.Service
+
+    return handlers.handle(
+      "session.messages",
+      Effect.fn(function* (ctx) {
+        if (ctx.query.cursor && ctx.query.order !== undefined)
+          return yield* new InvalidCursorError({ message: "Cursor cannot be combined with order" })
+        const decoded = yield* Effect.try({
+          try: () => (ctx.query.cursor ? cursor.decode(ctx.query.cursor) : undefined),
+          catch: () => new InvalidCursorError({ message: "Invalid cursor" }),
+        })
+        const order = decoded?.order ?? ctx.query.order ?? "desc"
+        const messages = yield* session
+          .messages({
+            sessionID: ctx.params.sessionID,
+            limit: ctx.query.limit ?? DefaultMessagesLimit,
+            order,
+            cursor: decoded ? { id: decoded.id, direction: decoded.direction } : undefined,
+          })
+          .pipe(
+            Effect.catchTag("Session.NotFoundError", (error) =>
+              Effect.fail(
+                new SessionNotFoundError({
+                  sessionID: error.sessionID,
+                  message: `Session not found: ${error.sessionID}`,
+                }),
+              ),
+            ),
+            Effect.catchTag("Session.MessageDecodeError", (error) => {
+              const ref = `err_${crypto.randomUUID().slice(0, 8)}`
+              return Effect.logError("failed to decode session message").pipe(
+                Effect.annotateLogs({ ref, sessionID: error.sessionID, messageID: error.messageID }),
+                Effect.andThen(
+                  Effect.fail(
+                    new UnknownError({
+                      message: "Unexpected server error. Check server logs for details.",
+                      ref,
+                    }),
+                  ),
+                ),
+              )
+            }),
+          )
+        const first = messages[0]
+        const last = messages.at(-1)
+        return {
+          data: messages,
+          cursor: {
+            previous: first ? cursor.encode(first, order, "previous") : undefined,
+            next: last ? cursor.encode(last, order, "next") : undefined,
+          },
+        }
+      }),
+    )
+  }),
+)