fix: escape special characters in commit message for NTFY

Use shell variables to properly handle multi-line commit messages
and special characters that cause shell parsing errors.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitea/workflows/notify.yml

@@ -7,12 +7,21 @@ jobs:
     steps:
       - name: Send to NTFY
         run: |
-          curl -d "🚀 ${{ github.repository_name }}
-          New commit ${{ github.sha }}
+          REPO="${{ github.repository_name }}"
+          SHA="${{ github.sha }}"
+          MSG="${{ github.event.head_commit.message }}"
+          AUTHOR="${{ github.actor }}"
+          BRANCH="${{ github.ref_name }}"
+
+          # 将多行消息替换为空格，避免shell解析错误
+          MSG=$(echo "$MSG" | tr '\n' ' ' | sed 's/"/\\"/g')
+
+          curl -d "🚀 $REPO
+          New commit $SHA
           📝 Message
-          ${{ github.event.head_commit.message }}
-          👤 Author: ${{ github.actor }}
-          🌿 Branch: ${{ github.ref_name }}" \
+          $MSG
+          👤 Author: $AUTHOR
+          🌿 Branch: $BRANCH" \
             -H "Title: Git Push Notification" \
             -H "Priority: default" \
             -H "Tags: gitea,push,${{ github.repository_name }}" \