Conditionally set local git config based on skip-checkout input (#11)

* fix(github-app-auth): skip local git config when skip-checkout is true

When skip-checkout: 'true', there is no git repo yet, so local git
config commands fail with "fatal: not in a git directory" (exit 128).
Wrap the local (non---global) git config commands in a conditional so
they only run when a repo is present.

https://claude.ai/code/session_01To6bMgr59sMZgHKDTt4F1x

* fix(github-app-auth): set local git config after checkout step

Move local git config (user.name, user.email) to a dedicated step that
runs after checkout, so it always sets both global and local config when
a repo is present. When skip-checkout is true, only global config is set.

https://claude.ai/code/session_01To6bMgr59sMZgHKDTt4F1x

* fix checkout-as-app to also set git config user name and email after checkout

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: nsheaps

.github/actions/checkout-as-app/action.yml

@@ -161,3 +161,9 @@ runs:
         set-safe-directory: ${{ inputs.set-safe-directory }}
         github-server-url: ${{ inputs.github-server-url }}
         persist-credentials: ${{ inputs.persist-credentials }}
+
+    - name: Configure local git user
+      shell: bash
+      run: |
+        git config user.name '${{ steps.auth.outputs.user-name }}'
+        git config user.email '${{ steps.auth.outputs.user-email }}'

.github/actions/github-app-auth/action.yml

@@ -80,9 +80,7 @@ runs:
         echo "GITHUB_TOKEN=${GH_TOKEN}" >> $GITHUB_ENV
         echo "Wrote GITHUB_TOKEN to GITHUB_ENV"
         git config --global user.name '${{ steps.get-user-id.outputs.user-name }}'
-        git config user.name '${{ steps.get-user-id.outputs.user-name }}'
         git config --global user.email '${{ steps.get-user-id.outputs.user-email }}'
-        git config user.email '${{ steps.get-user-id.outputs.user-email }}'
 
     - name: Output GitHub App authentication info
       shell: bash
@@ -101,3 +99,10 @@ runs:
         token: ${{ steps.app-token.outputs.token }}
         clean: false
         persist-credentials: true
+
+    - name: Configure local git user
+      if: inputs.skip-checkout != 'true'
+      shell: bash
+      run: |
+        git config user.name '${{ steps.get-user-id.outputs.user-name }}'
+        git config user.email '${{ steps.get-user-id.outputs.user-email }}'