refactor: load settings once per run and reuse shared helpers

The application caches the settings snapshot and reloads it only after
an update through the store, so output and prompt helpers no longer
read and parse config.yml and hosts.yml several times per command.
canPrompt and chooser replace the inline prompt-policy checks.

Checks are tallied by one services.Tally, terminal.Plural replaces the
two app copies, refKind.article/noun replace the comment group's own
words, list commands use servicePage, and web URLs are built by
repositoryURL and webURL in browser.go.

Signed-off-by: bircni <bircni@icloud.com>

internal/app/notifications.go

@@ -99,7 +99,7 @@ list shows identify notification threads; they are not issue numbers.`}
 					}, func(item services.Notification) string { return fmt.Sprintf(mark.done, notificationLabel(item)) })
 				}
 				what := notificationsWith(filters) + " " + s.where
-				if settings, err := a.deps.Settings.Load(); err == nil && a.policy(settings).CanPrompt(a.deps.Streams) {
+				if a.canPrompt() {
 					if err := a.confirmAction(cmd, terminal.Confirmation{Prompt: fmt.Sprintf(mark.ask, what), DefaultYes: true}); err != nil {
 						return err
 					}
@@ -115,7 +115,7 @@ list shows identify notification threads; they are not issue numbers.`}
 					a.warn(cmd, "No %s", what)
 					return nil
 				}
-				a.done(cmd, mark.done, plural(len(results), "notification"))
+				a.done(cmd, mark.done, terminal.Plural(len(results), "notification"))
 				return nil
 			},
 		}
@@ -176,7 +176,7 @@ $ tea notification list --type pull --since 24h`,
 			what := notificationsWith(opts.Statuses) + " " + s.where
 			return writeTable(a, cmd, page.Items, listSpec[services.Notification]{
 				Columns: notificationColumns, Row: notificationRow, Empty: "no " + what, Context: what,
-			}, listPage{Number: opts.Page, More: page.More, Total: page.Total, Counted: page.Counted})
+			}, servicePage(page, opts.Page))
 		},
 	}
 	notificationFilters(command, &opts, &updated)