feat: help 新增 create 命令帮助，更新阶段顺序

src/cli/help.ts

@@ -27,6 +27,15 @@ const COMMANDS: Record<string, CommandHelpDef> = {
     detail: "生成 SDD 流程中讨论阶段的提示词，输出到标准输出。需要先运行 init 初始化项目。",
     exampleArgs: ["discuss"],
   },
+  create: {
+    name: "create",
+    alias: "create <变更>",
+    description: "创建：创建变更目录",
+    usageTemplate: "create <change-name>",
+    args: [{ name: "<change-name>", desc: '变更名称，如 "add-login"' }],
+    detail: "在 .rune/changes/ 下创建以变更名称命名的目录，并生成创建阶段提示词。",
+    exampleArgs: ["create add-user-auth", "create fix-memory-leak"],
+  },
   plan: {
     name: "plan",
     alias: "plan <变更> <文档>",
@@ -46,7 +55,7 @@ const COMMANDS: Record<string, CommandHelpDef> = {
     description: "构建：生成构建阶段提示词",
     usageTemplate: "build <change-name>",
     args: [{ name: "<change-name>", desc: '变更名称，如 "add-login"' }],
-    detail: "生成构建阶段的提示词。变更目录需已存在（通过 plan 创建）。",
+    detail: "生成构建阶段的提示词。变更目录需已存在（通过 create 创建）。",
     exampleArgs: ["build add-user-auth", "build fix-memory-leak"],
   },
   archive: {

tests/cli/help.test.ts

@@ -18,6 +18,7 @@ describe("showGlobalHelp", () => {
     const output = showGlobalHelp("rune");
     expect(output).toContain("init <工具...>");
     expect(output).toContain("discuss");
+    expect(output).toContain("create <变更>");
     expect(output).toContain("plan <变更> <文档>");
     expect(output).toContain("build <名称>");
     expect(output).toContain("archive <名称>");
@@ -48,6 +49,13 @@ describe("showCommandHelp", () => {
     expect(output).toContain("opencode");
   });
 
+  it("create 命令包含变更名参数", () => {
+    const output = showCommandHelp("create", "rune");
+    expect(output).toContain("rune create <change-name>");
+    expect(output).toContain("变更名称");
+    expect(output).toContain("rune create add-user-auth");
+  });
+
   it("不存在的命令返回 null", () => {
     const output = showCommandHelp("nonexistent", "rune");
     expect(output).toBeNull();