feat(config): add directory-aware label scoping for monorepos (fixes #541)

Adds automatic label filtering based on current working directory:
- New config option: directory.labels (maps directory patterns to labels)
- bd ready and bd list auto-apply label filtering when in matching directory
- Uses --label-any semantics (shows issues with any of the matching labels)

Config example:
```yaml
directory:
  labels:
    packages/maverick: maverick
    packages/agency: agency
```

When running `bd ready` from `packages/maverick/`, issues labeled
"maverick" are automatically shown first, without needing --label-any.

Closes #541

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

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

cmd/bd/list.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/spf13/cobra"
+	"github.com/steveyegge/beads/internal/config"
 	"github.com/steveyegge/beads/internal/rpc"
 	"github.com/steveyegge/beads/internal/storage"
 	"github.com/steveyegge/beads/internal/types"
@@ -148,7 +149,14 @@ var listCmd = &cobra.Command{
 
 		// Normalize labels: trim, dedupe, remove empty
 		labels = util.NormalizeLabels(labels)
-	labelsAny = util.NormalizeLabels(labelsAny)
+		labelsAny = util.NormalizeLabels(labelsAny)
+
+		// Apply directory-aware label scoping if no labels explicitly provided (GH#541)
+		if len(labels) == 0 && len(labelsAny) == 0 {
+			if dirLabels := config.GetDirectoryLabels(); len(dirLabels) > 0 {
+				labelsAny = dirLabels
+			}
+		}
 
 		filter := types.IssueFilter{
 			Limit: limit,

cmd/bd/ready.go

@@ -1,10 +1,13 @@
 package main
+
 import (
 	"encoding/json"
 	"fmt"
 	"os"
+
 	"github.com/fatih/color"
 	"github.com/spf13/cobra"
+	"github.com/steveyegge/beads/internal/config"
 	"github.com/steveyegge/beads/internal/rpc"
 	"github.com/steveyegge/beads/internal/storage/sqlite"
 	"github.com/steveyegge/beads/internal/types"
@@ -27,6 +30,13 @@ var readyCmd = &cobra.Command{
 		labels = util.NormalizeLabels(labels)
 		labelsAny = util.NormalizeLabels(labelsAny)
 
+		// Apply directory-aware label scoping if no labels explicitly provided (GH#541)
+		if len(labels) == 0 && len(labelsAny) == 0 {
+			if dirLabels := config.GetDirectoryLabels(); len(dirLabels) > 0 {
+				labelsAny = dirLabels
+			}
+		}
+
 		filter := types.WorkFilter{
 			// Leave Status empty to get both 'open' and 'in_progress' (bd-165)
 			Type:       issueType,