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/discussion_view.go

@@ -200,17 +200,7 @@ func reviewerSummary(item services.Pull, reviews []services.Review) string {
 
 // checkSummary counts checks by outcome: "1 failing, 2 pending, 3 successful", or "" without checks.
 func checkSummary(checks []services.Check) string {
-	var failing, pending, passed int
-	for _, check := range checks {
-		switch {
-		case check.Pending():
-			pending++
-		case check.Passed():
-			passed++
-		default:
-			failing++
-		}
-	}
+	failing, pending, passed := services.Tally(checks)
 	var parts []string
 	for _, count := range []struct {
 		n    int
@@ -315,13 +305,13 @@ func (a *application) writeDiscussion(cmd *cobra.Command, target target, v discu
 		_, err := fmt.Fprint(cmd.OutOrStdout(), b.String())
 		return err
 	}
-	view.Meta = v.summary(now) + " • " + plural(int(v.comments), "comment")
+	view.Meta = v.summary(now) + " • " + terminal.Plural(int(v.comments), "comment")
 	view.URL = ""
 	muted := func(text string) string { return terminal.Colorize("muted", text, d.Color) }
 	var b strings.Builder
 	b.WriteString(view.Render(d))
 	if !withComments && v.comments > 0 {
-		b.WriteString("\n" + muted(plural(int(v.comments), "comment")+" — use --comments to view them") + "\n")
+		b.WriteString("\n" + muted(terminal.Plural(int(v.comments), "comment")+" — use --comments to view them") + "\n")
 	}
 	for _, comment := range comments {
 		heading := []string{terminal.Emphasis(terminal.SafeLine(comment.author), d.Color)}
@@ -346,10 +336,3 @@ func (a *application) writeDiscussion(cmd *cobra.Command, target target, v discu
 	b.WriteString("\n" + muted("View this "+v.view.Kind+" on Gitea: "+terminal.SafeLine(v.view.URL)) + "\n")
 	return a.writeHuman(cmd, b.String())
 }
-
-func plural(n int, unit string) string {
-	if n == 1 {
-		return "1 " + unit
-	}
-	return fmt.Sprintf("%d %ss", n, unit)
-}