Initial commit: Null DRM Official

Capture, decrypt, and restream toolkit with compiled-in app modules
(RTE, TG4, BBC), on-device MITM proxy, streamd control plane, and www.
BBC module.yaml is published (clear streams); other module values stay local.

apps/streamd/internal/api/apps.go

@@ -0,0 +1,47 @@
+package api
+
+import (
+	"net/http"
+
+	"drmdecryption/app"
+	"drmdecryption/mpd"
+)
+
+// appInfo describes one compiled-in app module to the dashboard, so the UI never
+// has to hardcode a provider or channel name.
+type appInfo struct {
+	Name      string        `json:"name"`
+	Channels  []channelInfo `json:"channels"`
+	Rewriter  string        `json:"rewriter"`
+	HasConfig bool          `json:"has_config"`
+}
+
+type channelInfo struct {
+	ID    string `json:"id"`
+	Label string `json:"label"`
+}
+
+// apps answers GET /api/apps: which providers this binary was built with.
+func (h *Handler) apps(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		writeErr(w, http.StatusMethodNotAllowed, "method not allowed")
+		return
+	}
+	out := []appInfo{}
+	for _, a := range app.All() {
+		info := appInfo{Name: a.Name(), Channels: []channelInfo{}, Rewriter: "none"}
+		for _, ch := range a.Channels() {
+			info.Channels = append(info.Channels, channelInfo{ID: ch.ID, Label: ch.Label})
+		}
+		// A module with no local values file has no channels to offer yet.
+		info.HasConfig = len(info.Channels) > 0
+		if sd, ok := a.(app.StreamDefaults); ok {
+			info.Rewriter = sd.RewriterName()
+		}
+		out = append(out, info)
+	}
+	writeJSON(w, http.StatusOK, map[string]any{
+		"apps":      out,
+		"rewriters": mpd.Names(),
+	})
+}