fix(hooks): use bd hooks run instead of nonexistent bd hook in shim templates

The post-checkout, post-merge, and pre-commit shim templates called
bd hook <name> which does not exist as a CLI command. The correct
command is bd hooks run <name> (matching prepare-commit-msg and
pre-push which were already correct). This caused git worktree
creation to fail, blocking gt sling to the beads rig.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: steveyegge

cmd/bd/templates/hooks/post-checkout

@@ -4,20 +4,14 @@
 #
 # bd (beads) post-checkout hook - thin shim
 #
-# This shim delegates to 'bd hook post-checkout' which contains
+# This shim delegates to 'bd hooks run post-checkout' which contains
 # the actual hook logic. This pattern ensures hook behavior is always
 # in sync with the installed bd version - no manual updates needed.
-#
-# The 'bd hook' command (singular) supports:
-# - Guard against frequent firing
-# - Per-worktree state tracking
-# - Dolt branch-then-merge pattern
-# - Hook chaining configuration
 
 # Check if bd is available
 if ! command -v bd >/dev/null 2>&1; then
     # Silently skip - post-checkout is called frequently
     exit 0
 fi
 
-exec bd hook post-checkout "$@"
+exec bd hooks run post-checkout "$@"

cmd/bd/templates/hooks/post-merge

@@ -4,14 +4,9 @@
 #
 # bd (beads) post-merge hook - thin shim
 #
-# This shim delegates to 'bd hook post-merge' which contains
+# This shim delegates to 'bd hooks run post-merge' which contains
 # the actual hook logic. This pattern ensures hook behavior is always
 # in sync with the installed bd version - no manual updates needed.
-#
-# The 'bd hook' command (singular) supports:
-# - Dolt push/pull sync
-# - Per-worktree state tracking
-# - Hook chaining configuration
 
 # Check if bd is available
 if ! command -v bd >/dev/null 2>&1; then
@@ -21,4 +16,4 @@ if ! command -v bd >/dev/null 2>&1; then
     exit 0
 fi
 
-exec bd hook post-merge "$@"
+exec bd hooks run post-merge "$@"

cmd/bd/templates/hooks/pre-commit

@@ -4,15 +4,9 @@
 #
 # bd (beads) pre-commit hook — thin shim
 #
-# Delegates to 'bd hook pre-commit' which contains the actual hook logic.
-# This pattern ensures hook behavior is always in sync with the installed
-# bd version — no manual updates needed.
-#
-# The 'bd hook' command supports:
-# - Per-worktree export state tracking
-# - Dolt in-process export (no lock deadlocks)
-# - Sync-branch routing
-# - Hook chaining configuration
+# Delegates to 'bd hooks run pre-commit' which contains the actual hook
+# logic. This pattern ensures hook behavior is always in sync with the
+# installed bd version — no manual updates needed.
 
 # Check if bd is available
 if ! command -v bd >/dev/null 2>&1; then
@@ -22,4 +16,4 @@ if ! command -v bd >/dev/null 2>&1; then
     exit 0
 fi
 
-exec bd hook pre-commit "$@"
+exec bd hooks run pre-commit "$@"