searxng, icecast, photos: full nox modules (ADR 0044/0046)

searxng: a search tool — tools-only, a stateless search has nothing to observe.
icecast: status tool, emits stream.started/.stopped by diffing live mountpoints.
photos: status/albums/recent tools, emits item.added (immich-shaped API, coded
defensively since the stub ships a placeholder image — flagged in the code).
Typecheck; manifests parse.

modules/searxng/tools/index.ts

@@ -0,0 +1,37 @@
+// searxng's tools (novox/hq ADR 0044), importing searxng's own client. A stateless metasearch: one
+// query in, merged results out — genuinely useful, and with nothing to observe over time it stays
+// tools-only (no events, no broker).
+
+import { registerModuleTools, type ToolDefinition } from "@novox/mesh-sdk/tools";
+import { SearxngClient } from "../client.js";
+
+export function getSearxngTools(searxng: SearxngClient): ToolDefinition[] {
+  return [
+    {
+      name: "searxng_search",
+      description: "Search the web through SearXNG's privacy-respecting metasearch — merged results from many engines.",
+      input: {
+        query: { type: "string", description: "the search query" },
+        categories: { type: "string", description: "comma-separated categories, e.g. 'general', 'news', 'images'" },
+        language: { type: "string", description: "language code, e.g. 'en' or 'en-US'" },
+      },
+      run: async (args) => {
+        const found = await searxng.search(String(args.query), {
+          categories: args.categories ? String(args.categories) : undefined,
+          language: args.language ? String(args.language) : undefined,
+        });
+        return found;
+      },
+    },
+  ];
+}
+
+// A URL always resolves (it defaults), so this normally contributes its tool; the try/catch keeps a
+// misconfiguration from taking the whole runtime down.
+registerModuleTools("searxng", (env) => {
+  try {
+    return getSearxngTools(SearxngClient.fromEnv(env));
+  } catch {
+    return [];
+  }
+});