feat(wiki): rename pages with --title alone, page lists on the client

wiki edit P --title New failed with "supply --body": renaming now keeps
the page's content, and edit needs one of --title, --body, --body-file
or --editor. wiki list --limit 1 returned every page because Gitea
replaces a limit of 1 with its default; the page list is now read whole
and paged on the client, so --limit and --page hold and the context line
counts the pages.

wiki create takes the title as an argument and, without --body, asks for
the content in the editor or an inline multi-line field. wiki view shows
the author, last update and revision count above the rendered page, and
--web opens it. wiki list and revisions show headed columns, page names
complete with Tab, and every change reports a ✓ line.

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

internal/app/wiki_test.go

@@ -0,0 +1,70 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package app
+
+import (
+	"context"
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestWikiEditRenamesAndKeepsTheContent(t *testing.T) {
+	var requests []string
+	server := newAuthenticatedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		requests = append(requests, r.Method+" "+r.URL.Path)
+		if r.Method == http.MethodPatch {
+			requirePayload(t, `{"title":"New Title","content_base64":"S2VlcCBtZQ=="}`, r.Body)
+			_, _ = w.Write([]byte(`{"title":"New Title","content_base64":"S2VlcCBtZQ=="}`))
+			return
+		}
+		_, _ = w.Write([]byte(`{"title":"Old Title","content_base64":"S2VlcCBtZQ=="}`))
+	}))
+	defer server.Close()
+	deps, out, diagnostics := repoTTYDeps(t, server.URL)
+	require.NoError(t, Execute(context.Background(), deps, []string{"wiki", "edit", "Old Title", "--title", "New Title", "-R", "alice/x", "--no-input"}))
+	require.Equal(t, []string{"GET /api/v1/repos/alice/x/wiki/page/Old Title", "PATCH /api/v1/repos/alice/x/wiki/page/Old Title"}, requests)
+	require.Empty(t, out.String())
+	require.Equal(t, "✓ Renamed wiki page \"Old Title\" to \"New Title\" in alice/x\n", diagnostics.String())
+	err := Execute(context.Background(), deps, []string{"wiki", "edit", "Home", "-R", "alice/x"})
+	require.ErrorContains(t, err, "supply --title, --body, --body-file or --editor")
+}
+
+func TestWikiListLimitsPagesOnTheClient(t *testing.T) {
+	server := newAuthenticatedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Query().Get("page") != "1" {
+			_, _ = w.Write([]byte(`[]`))
+			return
+		}
+		_, _ = w.Write([]byte(`[{"title":"Getting Started","last_commit":{"author":{"name":"alice","date":"2026-10-11T18:00:00Z"}}},{"title":"Home"}]`))
+	}))
+	defer server.Close()
+	deps, out, _ := repoTTYDeps(t, server.URL)
+	require.NoError(t, Execute(context.Background(), deps, []string{"wiki", "list", "--limit", "1", "-R", "alice/x"}))
+	require.Equal(t, `Showing 1 of 2 wiki pages in alice/x · next: --page 2
+
+TITLE            AUTHOR  UPDATED
+Getting Started  alice   about 2 hours ago
+`, out.String())
+}
+
+func TestWikiViewAndCreate(t *testing.T) {
+	server := newAuthenticatedServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.Method == http.MethodPost {
+			requirePayload(t, `{"title":"Page Two","content_base64":"Ym9keQ=="}`, r.Body)
+		}
+		_, _ = w.Write([]byte(`{"title":"Page Two","html_url":"https://gitea.test/alice/x/wiki/Page-Two","content_base64":"Ym9keQ==","commit_count":3,
+			"last_commit":{"author":{"name":"alice","date":"2026-10-11T19:00:00Z"}}}`))
+	}))
+	defer server.Close()
+	deps, out, diagnostics := repoTTYDeps(t, server.URL)
+	deps.Getenv = serverEnv(server.URL, map[string]string{"TERM": "dumb", "TEA_MARKDOWN": "raw"})
+	require.NoError(t, Execute(context.Background(), deps, []string{"wiki", "view", "Page Two", "-R", "alice/x"}))
+	require.Equal(t, "Page Two\nalice · updated about 1 hour ago · 3 revisions\n\nbody\n\nView this wiki page on Gitea: https://gitea.test/alice/x/wiki/Page-Two\n", out.String())
+	out.Reset()
+	require.NoError(t, Execute(context.Background(), deps, []string{"wiki", "create", "Page Two", "-b", "body", "-R", "alice/x"}))
+	require.Equal(t, "https://gitea.test/alice/x/wiki/Page-Two\n", out.String())
+	require.Equal(t, "✓ Created wiki page \"Page Two\" in alice/x\n", diagnostics.String())
+}