fix: logo 右半部分从 CODING 改为 CODE

去掉难以正确渲染的 N 和 G 字母，右半部分简化为 CODE（4 字母），
与左半部分 AIR 组合为 AIR CODE。

packages/app/src/components/prompt-input/attachments.test.ts

@@ -0,0 +1,108 @@
+import { describe, expect, test } from "bun:test"
+import { attachmentMime, pickAttachmentFiles } from "./files"
+import { pasteMode } from "./paste"
+
+describe("attachmentMime", () => {
+  test("keeps PDFs when the browser reports the mime", async () => {
+    const file = new File(["%PDF-1.7"], "guide.pdf", { type: "application/pdf" })
+    expect(await attachmentMime(file)).toBe("application/pdf")
+  })
+
+  test("normalizes structured text types to text/plain", async () => {
+    const file = new File(['{"ok":true}\n'], "data.json", { type: "application/json" })
+    expect(await attachmentMime(file)).toBe("text/plain")
+  })
+
+  test("accepts text files even with a misleading browser mime", async () => {
+    const file = new File(["export const x = 1\n"], "main.ts", { type: "video/mp2t" })
+    expect(await attachmentMime(file)).toBe("text/plain")
+  })
+
+  test("rejects binary files", async () => {
+    const file = new File([Uint8Array.of(0, 255, 1, 2)], "blob.bin", { type: "application/octet-stream" })
+    expect(await attachmentMime(file)).toBeUndefined()
+  })
+})
+
+describe("pickAttachmentFiles", () => {
+  test("reads the current project directory for every native picker invocation", async () => {
+    const paths: string[] = []
+    const files: File[] = []
+    const file = new File(["hello"], "hello.txt", { type: "text/plain" })
+    let directory = "C:\\Projects\\LoremIpsum"
+    const picker = async (options?: { defaultPath?: string }, onFile?: (file: File) => Promise<unknown>) => {
+      paths.push(options?.defaultPath ?? "")
+      await onFile?.(file)
+    }
+
+    pickAttachmentFiles({
+      picker,
+      directory: () => directory,
+      fallback: () => undefined,
+      onFile: async (selected) => files.push(selected),
+      onError: () => undefined,
+    })
+    await Promise.resolve()
+    directory = "C:\\Projects\\DolorSit"
+    pickAttachmentFiles({
+      picker,
+      directory: () => directory,
+      fallback: () => undefined,
+      onFile: async (selected) => files.push(selected),
+      onError: () => undefined,
+    })
+    await Promise.resolve()
+    expect(files).toEqual([file, file])
+    expect(paths).toEqual(["C:\\Projects\\LoremIpsum", "C:\\Projects\\DolorSit"])
+  })
+
+  test("uses the browser file input when no native picker exists", async () => {
+    let fallback = 0
+    pickAttachmentFiles({
+      directory: () => "/projects/consectetur-adipiscing",
+      fallback: () => {
+        fallback += 1
+      },
+      onFile: async () => undefined,
+      onError: () => undefined,
+    })
+    expect(fallback).toBe(1)
+  })
+
+  test("reports native picker failures without rejecting", async () => {
+    const error = new Error("picker unavailable")
+    const errors: unknown[] = []
+    const handled = Promise.withResolvers<void>()
+    pickAttachmentFiles({
+      picker: async () => Promise.reject(error),
+      directory: () => "C:\\Projects\\LoremIpsum",
+      fallback: () => undefined,
+      onFile: async () => undefined,
+      onError: (cause) => {
+        errors.push(cause)
+        handled.resolve()
+      },
+    })
+    await handled.promise
+    expect(errors).toEqual([error])
+  })
+})
+
+describe("pasteMode", () => {
+  test("uses native paste for short single-line text", () => {
+    expect(pasteMode("hello world")).toBe("native")
+  })
+
+  test("uses manual paste for multiline text", () => {
+    expect(
+      pasteMode(`{
+  "ok": true
+}`),
+    ).toBe("manual")
+    expect(pasteMode("a\r\nb")).toBe("manual")
+  })
+
+  test("uses manual paste for large text", () => {
+    expect(pasteMode("x".repeat(8000))).toBe("manual")
+  })
+})