Fix bd-120: Fix nil pointer crash in export command when daemon is running

Amp-Thread-ID: https://ampcode.com/threads/T-f6d324a9-aa24-4cf8-9962-7391602c8c91
Co-authored-by: Amp <amp@ampcode.com>

.beads/issues.jsonl

@@ -22,6 +22,7 @@
 {"id":"bd-118","title":"Issue in repo2","description":"This should go to repo2 database","status":"open","priority":1,"issue_type":"task","created_at":"2025-10-17T16:35:02.535522-07:00","updated_at":"2025-10-17T16:35:02.535522-07:00"}
 {"id":"bd-119","title":"Issue in repo1","description":"This should go to repo1 database","status":"open","priority":1,"issue_type":"task","created_at":"2025-10-17T16:35:02.535742-07:00","updated_at":"2025-10-17T16:35:02.535742-07:00"}
 {"id":"bd-12","title":"Implement reference scoring algorithm","description":"Count references for each colliding issue: text mentions in descriptions/notes/design fields + dependency references. Sort collisions by score ascending (fewest refs first). This minimizes total updates during renumbering.","status":"closed","priority":1,"issue_type":"task","created_at":"2025-10-16T20:46:08.971822-07:00","updated_at":"2025-10-17T01:32:00.634423-07:00","closed_at":"2025-10-14T02:51:52.198288-07:00","dependencies":[{"issue_id":"bd-12","depends_on_id":"bd-48","type":"parent-child","created_at":"2025-10-16T21:51:08.913972-07:00","created_by":"renumber"}]}
+{"id":"bd-120","title":"Fix nil pointer crash in bd export command","description":"When running `bd export -o .beads/issues.jsonl`, the command crashes with a nil pointer dereference.\n\n## Error\n```\npanic: runtime error: invalid memory address or nil pointer dereference\n[signal SIGSEGV: segmentation violation code=0x2 addr=0x108 pc=0x1034456fc]\n\ngoroutine 1 [running]:\nmain.init.func14(0x103c24380, {0x1034a9695?, 0x4?, 0x1034a95c9?})\n        /Users/stevey/src/vc/adar/beads/cmd/bd/export.go:74 +0x15c\n```\n\n## Context\n- This happened after closing bd-105, bd-114, bd-115\n- Auto-export from daemon still works fine\n- Only the manual `bd export` command crashes\n- Data was already synced via auto-export, so no data loss\n\n## Location\nFile: `cmd/bd/export.go` line 74","status":"closed","priority":1,"issue_type":"bug","created_at":"2025-10-17T17:34:05.014619-07:00","updated_at":"2025-10-17T17:35:41.414218-07:00","closed_at":"2025-10-17T17:35:41.414218-07:00"}
 {"id":"bd-13","title":"Implement ID remapping with reference updates","description":"Allocate new IDs for colliding issues. Update all text field references using word-boundary regex (\\bbd-10\\b). Update dependency records. Build id_mapping for reporting. Handle chain dependencies properly.","status":"closed","priority":1,"issue_type":"task","created_at":"2025-10-16T20:46:08.971822-07:00","updated_at":"2025-10-17T01:32:00.643252-07:00","closed_at":"2025-10-14T02:51:52.198356-07:00","dependencies":[{"issue_id":"bd-13","depends_on_id":"bd-48","type":"parent-child","created_at":"2025-10-16T21:51:08.92251-07:00","created_by":"renumber"}]}
 {"id":"bd-14","title":"Add --resolve-collisions flag and user reporting","description":"Add import flags: --resolve-collisions (auto-fix) and --dry-run (preview). Display clear report: collisions detected, remappings applied (old→new with scores), reference counts updated. Default behavior: fail on collision (safe).","status":"closed","priority":1,"issue_type":"task","created_at":"2025-10-16T20:46:08.971822-07:00","updated_at":"2025-10-17T01:32:00.645323-07:00","closed_at":"2025-10-16T10:07:34.003238-07:00","dependencies":[{"issue_id":"bd-14","depends_on_id":"bd-48","type":"parent-child","created_at":"2025-10-16T21:51:08.923374-07:00","created_by":"renumber"}]}
 {"id":"bd-15","title":"Write comprehensive collision resolution tests","description":"Test cases: simple collision, multiple collisions, dependency updates, text reference updates, chain dependencies, edge cases (partial ID matches, case sensitivity, triple merges). Add to import_test.go and collision_test.go.","status":"closed","priority":1,"issue_type":"task","created_at":"2025-10-16T20:46:08.971822-07:00","updated_at":"2025-10-17T01:32:00.647268-07:00","closed_at":"2025-10-16T10:07:34.007864-07:00","dependencies":[{"issue_id":"bd-15","depends_on_id":"bd-48","type":"parent-child","created_at":"2025-10-16T21:51:08.917092-07:00","created_by":"renumber"}]}

cmd/bd/export.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	"github.com/spf13/cobra"
+	"github.com/steveyegge/beads/internal/storage/sqlite"
 	"github.com/steveyegge/beads/internal/types"
 )
 
@@ -62,6 +63,23 @@ Output to stdout by default, or use -o flag for file output.`,
 			os.Exit(1)
 		}
 
+		// Export command doesn't work with daemon - need direct access
+		// Ensure we have a direct store connection
+		if store == nil {
+			// Initialize store directly even if daemon is running
+			var err error
+			if dbPath == "" {
+				fmt.Fprintf(os.Stderr, "Error: no database path found\n")
+				os.Exit(1)
+			}
+			store, err = sqlite.New(dbPath)
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "Error: failed to open database: %v\n", err)
+				os.Exit(1)
+			}
+			defer store.Close()
+		}
+
 		// Build filter
 		filter := types.IssueFilter{}
 		if statusFilter != "" {