refactor: remove unused bd pin/unpin/hook commands (bd-x0zl)

Analysis found these commands are dead code:
- gt never calls `bd pin` - uses `bd update --status=pinned` instead
- Beads.Pin() wrapper exists but is never called
- bd hook functionality duplicated by gt mol status
- Code comment says "pinned field is cosmetic for bd hook visibility"

Removed:
- cmd/bd/pin.go
- cmd/bd/unpin.go
- cmd/bd/hook.go

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

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

cmd/bd/hook.go

@@ -1,102 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"os"
-
-	"github.com/spf13/cobra"
-	"github.com/steveyegge/beads/internal/rpc"
-	"github.com/steveyegge/beads/internal/types"
-)
-
-// hookCmd inspects what's on an agent's hook
-var hookCmd = &cobra.Command{
-	Use:   "hook",
-	Short: "Inspect what's on an agent's hook",
-	Long: `Show what mol is pinned to an agent's hook.
-
-The hook is an agent's attachment point for work in the molecular chemistry
-metaphor. This command shows what work is currently pinned to the agent.
-
-Examples:
-  bd hook                          # Show what's on my hook
-  bd hook --agent deacon           # Show deacon's hook
-  bd hook --agent polecat-ace      # Show specific polecat's hook`,
-	Args: cobra.NoArgs,
-	Run:  runHook,
-}
-
-func runHook(cmd *cobra.Command, args []string) {
-	ctx := rootCtx
-	agentName, _ := cmd.Flags().GetString("agent")
-
-	if agentName == "" {
-		agentName = actor
-	}
-
-	var issues []*types.Issue
-
-	// Query for pinned issues assigned to this agent
-	if daemonClient != nil {
-		pinned := true
-		listArgs := &rpc.ListArgs{
-			Pinned:   &pinned,
-			Assignee: agentName,
-		}
-		resp, err := daemonClient.List(listArgs)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "Error querying hook: %v\n", err)
-			os.Exit(1)
-		}
-		if err := json.Unmarshal(resp.Data, &issues); err != nil {
-			fmt.Fprintf(os.Stderr, "Error parsing response: %v\n", err)
-			os.Exit(1)
-		}
-	} else if store != nil {
-		var err error
-		pinned := true
-		filter := types.IssueFilter{
-			Pinned:   &pinned,
-			Assignee: &agentName,
-		}
-		issues, err = store.SearchIssues(ctx, "", filter)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "Error querying hook: %v\n", err)
-			os.Exit(1)
-		}
-	} else {
-		fmt.Fprintf(os.Stderr, "Error: no database connection\n")
-		os.Exit(1)
-	}
-
-	if jsonOutput {
-		type hookResult struct {
-			Agent  string         `json:"agent"`
-			Pinned []*types.Issue `json:"pinned"`
-		}
-		outputJSON(hookResult{Agent: agentName, Pinned: issues})
-		return
-	}
-
-	fmt.Printf("Hook: %s\n", agentName)
-	if len(issues) == 0 {
-		fmt.Printf("  (empty)\n")
-		return
-	}
-
-	for _, issue := range issues {
-		phase := "mol"
-		if issue.Wisp {
-			phase = "wisp"
-		}
-		fmt.Printf("  📌 %s (%s) - %s\n", issue.ID, phase, issue.Status)
-		fmt.Printf("     %s\n", issue.Title)
-	}
-}
-
-func init() {
-	hookCmd.Flags().String("agent", "", "Agent to inspect (default: current agent)")
-
-	rootCmd.AddCommand(hookCmd)
-}