feat(hooks): make git hooks sync.branch aware (bd-8ib)

When sync.branch is configured, .beads changes are committed to a
separate branch via worktree rather than the current branch. Updated
both hooks to detect this configuration and skip the uncommitted
.beads check in that scenario.

Changes:
- pre-push: Skip uncommitted .beads check when sync.branch is set
- pre-commit: Skip flush and auto-staging when sync.branch is set
- Both: Use --json output for reliable config value detection
- Bump version to 0.22.2

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

examples/git-hooks/pre-push

@@ -1,5 +1,5 @@
 #!/bin/sh
-# bd-hooks-version: 0.22.1
+# bd-hooks-version: 0.22.2
 #
 # bd (beads) pre-push hook
 #
@@ -8,6 +8,9 @@
 # 2. Checking for uncommitted changes (staged, unstaged, untracked, deleted)
 # 3. Failing the push with clear instructions if changes found
 #
+# When sync.branch is configured, .beads changes are committed to a separate
+# branch via worktree, so the uncommitted check is skipped for the main branch.
+#
 # The pre-commit hook already exports changes, but this catches:
 # - Changes made between commit and push
 # - Pending debounced flushes (5s daemon delay)
@@ -25,6 +28,18 @@ if [ ! -d .beads ]; then
     exit 0
 fi
 
+# Check if sync.branch is configured - if so, .beads changes go to a separate
+# branch via worktree, not the current branch, so skip the uncommitted check
+if command -v bd >/dev/null 2>&1; then
+    # Use --json to get clean output (human-readable format prints "(not set)")
+    SYNC_BRANCH=$(bd config get sync.branch --json 2>/dev/null | grep -o '"value": *"[^"]*"' | sed 's/"value": *"\([^"]*\)"/\1/')
+    if [ -n "$SYNC_BRANCH" ]; then
+        # sync.branch is configured, skip .beads uncommitted check
+        # Changes are synced to the separate branch, not this one
+        exit 0
+    fi
+fi
+
 # Optionally flush pending bd changes so they surface in JSONL
 # This prevents the race where a debounced flush lands after the check
 if command -v bd >/dev/null 2>&1; then