feat: logins list/default, actions run delete, date filters, label update alias

- fgj logins {list,default}: complementary UI to 'fgj auth'. 'list'
  shows all configured hosts (hostname, user, protocol, default flag,
  match_dirs) with --json. 'default [hostname]' gets or sets which
  host wins in resolution when no other signal is present.
  Adds 'Default bool' field to HostConfig; GetHost consults it between
  match_dirs and the codeberg.org fallback. Multiple defaults tolerated
  with a stderr warning; alphabetical-first wins.

- fgj actions run delete: delete a completed workflow run via raw
  DELETE (SDK v0.23.2 has no DeleteRepoActionRun). Fetches run first
  and refuses to delete non-terminal states unless --force; suggests
  'actions run cancel' for those. Confirmation prompt unless --yes.

- pr list / issue list gain --since and --before date filter flags.
  Accepts YYYY-MM-DD, RFC 3339, YYYY-MM-DD HH:MM:SS, and relative
  deltas (7d, 24h, 2w, 1m — months=30 days). Issues use server-side
  filter via ListIssueOption.Since/Before; PRs fall back to client-side
  (SDK lacks Since/Before on ListPullRequestsOptions).

- fgj label update added as alias for 'fgj label edit' (tea-compat).

All changes:
  cmd/logins.go (new, 140 LOC)
  cmd/actions_run_delete.go (new, ~85 LOC)
  cmd/pr.go, cmd/issue.go (+parseDateArg helper, filter wiring)
  cmd/label.go (1-line alias)
  internal/config/config.go (Default field + DefaultHost method)
  CHANGELOG.md
Built in parallel by three sub-agents; plus the label alias done
serially. go build / go vet / go test -race all clean.

cmd/logins.go

@@ -0,0 +1,160 @@
+package cmd
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+
+	"forgejo.zerova.net/public/fgj-sid/internal/config"
+	"github.com/spf13/cobra"
+)
+
+var loginsCmd = &cobra.Command{
+	Use:   "logins",
+	Short: "Manage configured Forgejo/Gitea logins",
+	Long: `Manage configured Forgejo/Gitea logins.
+
+This is a complementary command to 'fgj auth' using the noun vocabulary
+familiar to users of tea. Use 'fgj auth login' to add a new login and
+'fgj auth logout' to remove one.`,
+}
+
+var loginsListCmd = &cobra.Command{
+	Use:     "list",
+	Aliases: []string{"ls"},
+	Short:   "List all configured logins",
+	Long:    "List all configured Forgejo/Gitea logins with their hostname, user, protocol, default flag, and match_dirs.",
+	RunE:    runLoginsList,
+}
+
+var loginsDefaultCmd = &cobra.Command{
+	Use:   "default [hostname]",
+	Short: "Get or set the default login",
+	Long: `Get or set the default login.
+
+With no argument, prints the currently-configured default hostname
+(or "no default set" if none is configured).
+
+With a hostname argument, marks that login as the default and unsets
+the default flag on all other logins.`,
+	Args: cobra.MaximumNArgs(1),
+	RunE: runLoginsDefault,
+}
+
+func init() {
+	rootCmd.AddCommand(loginsCmd)
+	loginsCmd.AddCommand(loginsListCmd)
+	loginsCmd.AddCommand(loginsDefaultCmd)
+
+	addJSONFlags(loginsListCmd, "Output logins as JSON")
+}
+
+// loginEntry is the JSON representation of a configured login.
+type loginEntry struct {
+	Hostname    string   `json:"hostname"`
+	User        string   `json:"user"`
+	GitProtocol string   `json:"git_protocol"`
+	Default     bool     `json:"default"`
+	MatchDirs   []string `json:"match_dirs"`
+}
+
+func runLoginsList(cmd *cobra.Command, args []string) error {
+	cfg, err := config.Load()
+	if err != nil {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	hostnames := make([]string, 0, len(cfg.Hosts))
+	for hostname := range cfg.Hosts {
+		hostnames = append(hostnames, hostname)
+	}
+
+	// Sort by config-file order; fall back to alphabetical when Order is
+	// equal (e.g., both zero because the config was constructed in-memory
+	// rather than loaded from disk).
+	sort.Slice(hostnames, func(i, j int) bool {
+		a, b := cfg.Hosts[hostnames[i]], cfg.Hosts[hostnames[j]]
+		if a.Order != b.Order {
+			return a.Order < b.Order
+		}
+		return hostnames[i] < hostnames[j]
+	})
+
+	if wantJSON(cmd) {
+		entries := make([]loginEntry, 0, len(hostnames))
+		for _, hostname := range hostnames {
+			h := cfg.Hosts[hostname]
+			dirs := h.MatchDirs
+			if dirs == nil {
+				dirs = []string{}
+			}
+			entries = append(entries, loginEntry{
+				Hostname:    hostname,
+				User:        h.User,
+				GitProtocol: h.GitProtocol,
+				Default:     h.Default,
+				MatchDirs:   dirs,
+			})
+		}
+		return outputJSON(cmd, entries)
+	}
+
+	if len(hostnames) == 0 {
+		fmt.Fprintln(ios.Out, "No logins configured")
+		fmt.Fprintln(ios.Out, "Run 'fgj auth login' to add a login")
+		return nil
+	}
+
+	tp := ios.NewTablePrinter()
+	tp.AddHeader("HOSTNAME", "USER", "PROTOCOL", "DEFAULT", "MATCH_DIRS")
+	for _, hostname := range hostnames {
+		h := cfg.Hosts[hostname]
+		defaultMark := ""
+		if h.Default {
+			defaultMark = "*"
+		}
+		tp.AddRow(
+			hostname,
+			h.User,
+			h.GitProtocol,
+			defaultMark,
+			strings.Join(h.MatchDirs, ", "),
+		)
+	}
+	return tp.Render()
+}
+
+func runLoginsDefault(cmd *cobra.Command, args []string) error {
+	cfg, err := config.Load()
+	if err != nil {
+		return fmt.Errorf("failed to load config: %w", err)
+	}
+
+	if len(args) == 0 {
+		current := cfg.DefaultHost()
+		if current == "" {
+			fmt.Fprintln(ios.Out, "no default set")
+			return nil
+		}
+		fmt.Fprintln(ios.Out, current)
+		return nil
+	}
+
+	target := args[0]
+	if _, ok := cfg.Hosts[target]; !ok {
+		return fmt.Errorf("no configuration found for host %s", target)
+	}
+
+	for hostname, h := range cfg.Hosts {
+		h.Default = (hostname == target)
+		cfg.Hosts[hostname] = h
+	}
+
+	if err := cfg.Save(); err != nil {
+		return fmt.Errorf("failed to save config: %w", err)
+	}
+
+	cs := ios.ColorScheme()
+	fmt.Fprintf(ios.Out, "%s Default host set to %s\n", cs.SuccessIcon(), target)
+	return nil
+}