Implement inbox read cursors for unread threads

internal/cli/inbox/init.go

@@ -3,7 +3,6 @@ package inbox
 import (
 	"fmt"
 
-	"ai-workflow-skill/internal/db"
 	"ai-workflow-skill/internal/protocol"
 
 	"github.com/spf13/cobra"
@@ -16,16 +15,12 @@ func newInitCmd(opts *rootOptions) *cobra.Command {
 		RunE: func(cmd *cobra.Command, args []string) error {
 			ctx := cmd.Context()
 
-			sqlDB, err := db.Open(ctx, opts.dbPath)
+			sqlDB, err := openInboxDB(ctx, opts.dbPath)
 			if err != nil {
 				return err
 			}
 			defer sqlDB.Close()
 
-			if err := db.ApplyMigrations(ctx, sqlDB); err != nil {
-				return err
-			}
-
 			resp := protocol.Success{
 				OK:      true,
 				Command: "init",