Initial TopDeck: self-hosted ranked favorites

A single Go binary with SQLite that serves a public page of the owner's
ranked lists (movies, TV, albums, songs, video games, theater) and a
login-gated editor.

- Lists of 1–65,535 entries (100 recommended), several per category
- Search-to-add via TMDB, TheTVDB, IGDB, Deezer/MusicBrainz, Wikipedia;
  manual entry as a fallback
- Theater entries carry a production (Broadway, tour, …), venue and cast
- Artwork cached locally; URL override and uploads
- Drag, arrow and type-a-rank reordering; paginated for long lists
- 12 theme presets plus custom CSS
- First-run setup code or env-provided admin; bcrypt, rate-limited login,
  CSRF-guarded JSON API
- Dockerfile and docker-compose.yml

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/providers/wikipedia.go

@@ -0,0 +1,100 @@
+package providers
+
+import (
+	"context"
+	"net/url"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+// wikipedia finds stage works (musicals, plays, operas) on English
+// Wikipedia. There's no free, open theater database with an API, and
+// Wikipedia has the best coverage plus poster/logo art for most shows. The
+// specific production (Broadway, a tour, …) is chosen by the owner.
+type wikipedia struct {
+	r *Registry
+}
+
+func (w *wikipedia) Name() string  { return "wikipedia" }
+func (w *wikipedia) Label() string { return "Wikipedia" }
+
+const theaterTemplates = `hastemplate:"Infobox musical|Infobox play|Infobox opera"`
+
+func (w *wikipedia) Search(ctx context.Context, query string) ([]Result, error) {
+	res, err := w.search(ctx, query+" "+theaterTemplates)
+	if err == nil && len(res) == 0 {
+		res, err = w.search(ctx, query)
+	}
+	return res, err
+}
+
+var leadingYear = regexp.MustCompile(`^(1[5-9]\d\d|20\d\d)\s+`)
+
+func (w *wikipedia) search(ctx context.Context, query string) ([]Result, error) {
+	q := url.Values{
+		"action":        {"query"},
+		"format":        {"json"},
+		"formatversion": {"2"},
+		"generator":     {"search"},
+		"gsrsearch":     {query},
+		"gsrlimit":      {"15"},
+		"prop":          {"pageimages|description|info|extracts"},
+		"piprop":        {"thumbnail"},
+		"pithumbsize":   {"800"},
+		"pilicense":     {"any"},
+		"inprop":        {"url"},
+		"exintro":       {"1"},
+		"explaintext":   {"1"},
+		"exsentences":   {"3"},
+		"exlimit":       {"max"},
+	}
+	var resp struct {
+		Query struct {
+			Pages []struct {
+				PageID      int64  `json:"pageid"`
+				Title       string `json:"title"`
+				Index       int    `json:"index"`
+				Description string `json:"description"`
+				Extract     string `json:"extract"`
+				FullURL     string `json:"fullurl"`
+				Thumbnail   struct {
+					Source string `json:"source"`
+				} `json:"thumbnail"`
+			} `json:"pages"`
+		} `json:"query"`
+	}
+	if err := w.r.getJSON(ctx, "https://en.wikipedia.org/w/api.php?"+q.Encode(), nil, &resp); err != nil {
+		return nil, err
+	}
+	pages := resp.Query.Pages
+	sort.Slice(pages, func(i, j int) bool { return pages[i].Index < pages[j].Index })
+	out := make([]Result, 0, len(pages))
+	for _, p := range pages {
+		title := p.Title
+		// "Hamilton (musical)" → "Hamilton"
+		if i := strings.LastIndex(title, " ("); i > 0 && strings.HasSuffix(title, ")") {
+			title = title[:i]
+		}
+		desc := leadingYear.ReplaceAllString(p.Description, "")
+		if desc != "" {
+			desc = strings.ToUpper(desc[:1]) + desc[1:]
+		}
+		img := p.Thumbnail.Source
+		if i := strings.Index(img, "?"); i > 0 {
+			img = img[:i]
+		}
+		out = append(out, Result{
+			Provider:    "wikipedia",
+			ProviderID:  strconv.FormatInt(p.PageID, 10),
+			Title:       title,
+			Subtitle:    desc,
+			Year:        yearOf(p.Description),
+			ImageURL:    img,
+			ExternalURL: p.FullURL,
+			Overview:    truncate(p.Extract, 600),
+		})
+	}
+	return out, nil
+}