Add substring ID matching for all bd commands

- Enhanced ResolvePartialID to handle:
  - Bare hashes: 07b8c8 → bd-07b8c8
  - Prefix without hyphen: bd07b8c8 → bd-07b8c8
  - Full IDs: bd-07b8c8 (unchanged)
  - Substring matching: 07b → finds bd-07b8c8

- Added RPC support:
  - New OpResolveID operation
  - handleResolveID server handler
  - ResolveID client method

- Updated all commands to resolve IDs:
  - show, update, close, reopen
  - dep (add, remove, tree)
  - label (add, remove, list)

- Works in both daemon and direct modes

Fixes bd-0591c3

internal/rpc/server_issues_epics.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 
 	"github.com/steveyegge/beads/internal/types"
+	"github.com/steveyegge/beads/internal/utils"
 )
 
 // normalizeLabels trims whitespace, removes empty strings, and deduplicates labels
@@ -319,6 +320,31 @@ func (s *Server) handleList(req *Request) Response {
 	}
 }
 
+func (s *Server) handleResolveID(req *Request) Response {
+	var args ResolveIDArgs
+	if err := json.Unmarshal(req.Args, &args); err != nil {
+		return Response{
+			Success: false,
+			Error:   fmt.Sprintf("invalid resolve_id args: %v", err),
+		}
+	}
+
+	ctx := s.reqCtx(req)
+	resolvedID, err := utils.ResolvePartialID(ctx, s.storage, args.ID)
+	if err != nil {
+		return Response{
+			Success: false,
+			Error:   fmt.Sprintf("failed to resolve ID: %v", err),
+		}
+	}
+
+	data, _ := json.Marshal(resolvedID)
+	return Response{
+		Success: true,
+		Data:    data,
+	}
+}
+
 func (s *Server) handleShow(req *Request) Response {
 	var showArgs ShowArgs
 	if err := json.Unmarshal(req.Args, &showArgs); err != nil {