fix: Address all errcheck and misspell linter errors

internal/daemon/discovery.go

@@ -163,7 +163,7 @@ func discoverDaemon(socketPath string) DaemonInfo {
 		}
 		return daemon
 	}
-	defer client.Close()
+	defer func() { _ = client.Close() }()
 
 	// Get status
 	status, err := client.Status()
@@ -264,7 +264,7 @@ func StopDaemon(daemon DaemonInfo) error {
 	// Try graceful shutdown via RPC first
 	client, err := rpc.TryConnectWithTimeout(daemon.SocketPath, 500*time.Millisecond)
 	if err == nil && client != nil {
-		defer client.Close()
+		defer func() { _ = client.Close() }()
 		if err := client.Shutdown(); err == nil {
 			// Wait a bit for daemon to shut down
 			time.Sleep(200 * time.Millisecond)
@@ -334,7 +334,7 @@ func stopDaemonWithTimeout(daemon DaemonInfo) error {
 	// Try RPC shutdown first (2 second timeout)
 	client, err := rpc.TryConnectWithTimeout(daemon.SocketPath, 2*time.Second)
 	if err == nil && client != nil {
-		defer client.Close()
+		defer func() { _ = client.Close() }()
 		if err := client.Shutdown(); err == nil {
 			// Wait and verify process died
 			time.Sleep(500 * time.Millisecond)

internal/rpc/test_helpers.go

@@ -20,7 +20,7 @@ func newTestStore(t *testing.T, dbPath string) *sqlite.SQLiteStorage {
 	// CRITICAL (bd-166): Set issue_prefix to prevent "database not initialized" errors
 	ctx := context.Background()
 	if err := store.SetConfig(ctx, "issue_prefix", "bd"); err != nil {
-		store.Close()
+		_ = store.Close()
 		t.Fatalf("Failed to set issue_prefix: %v", err)
 	}
 	

internal/storage/sqlite/collision.go

@@ -126,17 +126,17 @@ func compareIssues(existing, incoming *types.Issue) []string {
 // hashIssueContent creates a deterministic hash of issue content (excluding ID and timestamps)
 func hashIssueContent(issue *types.Issue) string {
 	h := sha256.New()
-	fmt.Fprintf(h, "title:%s\n", issue.Title)
-	fmt.Fprintf(h, "description:%s\n", issue.Description)
-	fmt.Fprintf(h, "status:%s\n", issue.Status)
-	fmt.Fprintf(h, "priority:%d\n", issue.Priority)
-	fmt.Fprintf(h, "type:%s\n", issue.IssueType)
-	fmt.Fprintf(h, "assignee:%s\n", issue.Assignee)
-	fmt.Fprintf(h, "design:%s\n", issue.Design)
-	fmt.Fprintf(h, "acceptance:%s\n", issue.AcceptanceCriteria)
-	fmt.Fprintf(h, "notes:%s\n", issue.Notes)
+	_, _ = fmt.Fprintf(h, "title:%s\n", issue.Title)
+	_, _ = fmt.Fprintf(h, "description:%s\n", issue.Description)
+	_, _ = fmt.Fprintf(h, "status:%s\n", issue.Status)
+	_, _ = fmt.Fprintf(h, "priority:%d\n", issue.Priority)
+	_, _ = fmt.Fprintf(h, "type:%s\n", issue.IssueType)
+	_, _ = fmt.Fprintf(h, "assignee:%s\n", issue.Assignee)
+	_, _ = fmt.Fprintf(h, "design:%s\n", issue.Design)
+	_, _ = fmt.Fprintf(h, "acceptance:%s\n", issue.AcceptanceCriteria)
+	_, _ = fmt.Fprintf(h, "notes:%s\n", issue.Notes)
 	if issue.ExternalRef != nil {
-		fmt.Fprintf(h, "external_ref:%s\n", *issue.ExternalRef)
+		_, _ = fmt.Fprintf(h, "external_ref:%s\n", *issue.ExternalRef)
 	}
 	return fmt.Sprintf("%x", h.Sum(nil))
 }

internal/storage/sqlite/test_helpers.go

@@ -18,7 +18,7 @@ func newTestStore(t *testing.T, dbPath string) *SQLiteStorage {
 	// CRITICAL (bd-166): Set issue_prefix to prevent "database not initialized" errors
 	ctx := context.Background()
 	if err := store.SetConfig(ctx, "issue_prefix", "bd"); err != nil {
-		store.Close()
+		_ = store.Close()
 		t.Fatalf("Failed to set issue_prefix: %v", err)
 	}
 	

internal/utils/issue_id.go

@@ -21,6 +21,6 @@ func ExtractIssueNumber(issueID string) int {
 		return 0
 	}
 	var num int
-	fmt.Sscanf(issueID[idx+1:], "%d", &num)
+	_, _ = fmt.Sscanf(issueID[idx+1:], "%d", &num)
 	return num
 }