fix(codex): qualify git bash rerun guidance

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/cli/install-codex/git-bash.test.ts

@@ -113,7 +113,7 @@ describe("git-bash", () => {
     expect(result.checkedPaths).toEqual([PROGRAM_FILES_GIT_BASH, PROGRAM_FILES_X86_GIT_BASH])
     expect(result.installHint).toContain("winget install --id Git.Git -e --source winget")
     expect(result.installHint).toContain("OMO_CODEX_GIT_BASH_PATH=C:\\path\\to\\bash.exe")
-    expect(result.installHint).toContain("rerun `bunx omo install --platform=codex`")
+    expect(result.installHint).toContain("rerun `bunx --package oh-my-openagent omo install --platform=codex`")
   })
 
   test("#given Windows without Git Bash and winget is allowed #when preparing #then winget runs and resolver is retried", async () => {

src/cli/install-codex/git-bash.ts

@@ -100,7 +100,7 @@ function missingGitBash(checkedPaths: readonly string[]): GitBashResolution {
       "Git Bash is required for native Windows Codex profile installs.",
       "Install it with: winget install --id Git.Git -e --source winget",
       `For a custom install, set ${GIT_BASH_ENV_KEY}=C:\\path\\to\\bash.exe`,
-      "Then rerun `bunx omo install --platform=codex`.",
+      "Then rerun `bunx --package oh-my-openagent omo install --platform=codex`.",
     ].join("\n"),
   }
 }

src/cli/install-codex/install-codex-git-bash-preflight.test.ts

@@ -52,7 +52,7 @@ describe("install-codex Git Bash preflight", () => {
           "Git Bash is required.",
           "winget install --id Git.Git -e --source winget",
           "OMO_CODEX_GIT_BASH_PATH=C:\\path\\to\\bash.exe",
-          "rerun `bunx omo install --platform=codex`",
+          "rerun `bunx --package oh-my-openagent omo install --platform=codex`",
         ].join("\n"),
       }),
       runCommand: async (command: string, args: readonly string[], options: CommandRunOptions) => {
@@ -61,9 +61,23 @@ describe("install-codex Git Bash preflight", () => {
     })
 
     // then
-    await expect(install).rejects.toThrow("winget install --id Git.Git -e --source winget")
+    let installError: unknown
+    try {
+      await install
+    } catch (error) {
+      installError = error
+    }
+    expect(installError).toBeInstanceOf(Error)
+    expect((installError as Error).message).toContain("winget install --id Git.Git -e --source winget")
     expect(commands).toEqual([])
-    await expect(stat(join(codexHome, "config.toml"))).rejects.toThrow()
+
+    let configStatError: unknown
+    try {
+      await stat(join(codexHome, "config.toml"))
+    } catch (error) {
+      configStatError = error
+    }
+    expect(configStatError).toBeInstanceOf(Error)
   })
 
   test("#given Windows without Git Bash #when winget succeeds and resolver recovers #then install continues", async () => {