fix: only show show-branch when commits are truly unpushed

The previous implementation blocked deletion whenever the branch wasn't
an ancestor of the default branch, even if all commits were pushed to
origin/feature-branch. This forced users to use --force unnecessarily.

Now we:
1. First check git log --branches --not --remotes (original behavior)
2. Only if that finds unpushed commits, show the enhanced error

This maintains the original safety check (only block truly unpushed
commits) while providing better error messaging when it matters.

Author: ammar-agent

src/runtime/SSHRuntime.ts

@@ -985,46 +985,34 @@ export class SSHRuntime implements Runtime {
             cd ${shescape.quote(deletedPath)} || exit 1
             git diff --quiet --exit-code && git diff --quiet --cached --exit-code || exit 1
             if git remote | grep -q .; then
-              # Get current branch
-              BRANCH=$(git rev-parse --abbrev-ref HEAD 2>/dev/null)
-              
-              # Get default branch (try origin/HEAD, fallback to main, then master)
-              DEFAULT=$(git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's@^refs/remotes/origin/@@')
-              if [ -z "$DEFAULT" ]; then
-                if git rev-parse --verify origin/main >/dev/null 2>&1; then
-                  DEFAULT="main"
-                elif git rev-parse --verify origin/master >/dev/null 2>&1; then
-                  DEFAULT="master"
-                fi
-              fi
-              
-              # If we have both branch and default, use show-branch for better output
-              if [ -n "$BRANCH" ] && [ -n "$DEFAULT" ]; then
-                if git show-branch "$BRANCH" "origin/$DEFAULT" >/dev/null 2>&1; then
-                  # Check if there are commits not in the default branch
-                  if ! git merge-base --is-ancestor "$BRANCH" "origin/$DEFAULT" 2>/dev/null; then
-                    echo "Branch status compared to origin/$DEFAULT:" >&2
-                    echo "" >&2
-                    git show-branch "$BRANCH" "origin/$DEFAULT" 2>&1 | head -20 >&2
-                    echo "" >&2
-                    echo "Note: If your PR was squash-merged, these commits are already in origin/$DEFAULT and safe to delete." >&2
-                    exit 2
-                  fi
-                else
-                  # Fallback to git log if show-branch fails
-                  unpushed=$(git log --branches --not --remotes --oneline)
-                  if [ -n "$unpushed" ]; then
-                    echo "$unpushed" | head -10 >&2
-                    exit 2
+              # First, check the original condition: any commits not in any remote
+              unpushed=$(git log --branches --not --remotes --oneline)
+              if [ -n "$unpushed" ]; then
+                # Get current branch for better error messaging
+                BRANCH=$(git rev-parse --abbrev-ref HEAD 2>/dev/null)
+                
+                # Get default branch (try origin/HEAD, fallback to main, then master)
+                DEFAULT=$(git symbolic-ref refs/remotes/origin/HEAD 2>/dev/null | sed 's@^refs/remotes/origin/@@')
+                if [ -z "$DEFAULT" ]; then
+                  if git rev-parse --verify origin/main >/dev/null 2>&1; then
+                    DEFAULT="main"
+                  elif git rev-parse --verify origin/master >/dev/null 2>&1; then
+                    DEFAULT="master"
                   fi
                 fi
-              else
-                # Fallback to git log if we can't determine branches
-                unpushed=$(git log --branches --not --remotes --oneline)
-                if [ -n "$unpushed" ]; then
+                
+                # If we have both branch and default, use show-branch for better output
+                if [ -n "$BRANCH" ] && [ -n "$DEFAULT" ] && git show-branch "$BRANCH" "origin/$DEFAULT" >/dev/null 2>&1; then
+                  echo "Branch status compared to origin/$DEFAULT:" >&2
+                  echo "" >&2
+                  git show-branch "$BRANCH" "origin/$DEFAULT" 2>&1 | head -20 >&2
+                  echo "" >&2
+                  echo "Note: If your PR was squash-merged, these commits are already in origin/$DEFAULT and safe to delete." >&2
+                else
+                  # Fallback to just showing the commit list
                   echo "$unpushed" | head -10 >&2
-                  exit 2
                 fi
+                exit 2
               fi
             fi
             exit 0