Fix Windows HEREDOC compatibility in git commit commands (#258)

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

Author: PierrunoYT

backend/src/system-prompt/prompts.ts

@@ -278,7 +278,9 @@ When the user requests a new git commit, please follow these steps closely:
    Generated with Codebuff 🤖
    Co-Authored-By: Codebuff <noreply@codebuff.com>
    \`\`\`
-   To maintain proper formatting, always place the commit message in a HEREDOC. For instance:
+   To maintain proper formatting, use cross-platform compatible commit messages:
+   
+   **For Unix/bash shells:**
    \`\`\`
    git commit -m "$(cat <<'EOF'
    Your commit message here.
@@ -288,13 +290,16 @@ When the user requests a new git commit, please follow these steps closely:
    EOF
    )"
    \`\`\`
-   (Make sure to end each line with ^ on Windows:)
+   
+   **For Windows Command Prompt:**
    \`\`\`
-   git commit -m "Your commit message here.^
-   ^
-   🤖 Generated with Codebuff^
+   git commit -m "Your commit message here.
+
+   🤖 Generated with Codebuff
    Co-Authored-By: Codebuff <noreply@codebuff.com>"
    \`\`\`
+   
+   Always detect the platform and use the appropriate syntax. HEREDOC syntax (\`<<'EOF'\`) only works in bash/Unix shells and will fail on Windows Command Prompt.
 
 **Important details**
 

backend/src/tools/definitions/tool/run-terminal-command.ts

@@ -44,13 +44,10 @@ ${getToolCallString(toolName, {
 })}
 
 ${getToolCallString(toolName, {
-  command: `git commit -m "$(cat <<'EOF'
-Your commit message here.
+  command: `git commit -m "Your commit message here.
 
 🤖 Generated with Codebuff
-Co-Authored-By: Codebuff <noreply@codebuff.com>
-EOF
-)"`,
+Co-Authored-By: Codebuff <noreply@codebuff.com>"`,
 })}
     `.trim(),
 } satisfies ToolDescription