added shared volume to diagnostic, added folder picker to android app, fixed bridge for attachment uploading, fixed hopefully chat history in android app

diagnostic/server.js

@@ -462,6 +462,11 @@ function connectRVS(forcePlain) {
           pipelineEnd(true, `Antwort via RVS von ${sender}: "${(msg.payload.text || "").slice(0, 120)}"`);
         }
         broadcast({ type: "rvs_chat", msg });
+      } else if (msg.type === "stt_result" && msg.payload) {
+        const text = msg.payload.text || "(nicht erkannt)";
+        log("info", "rvs", `STT: "${text.slice(0, 100)}"`);
+        // Im Chat als User-Nachricht anzeigen (zur Info, wurde schon an ARIA gesendet)
+        broadcast({ type: "rvs_chat", msg: { type: "chat", payload: { text: `\uD83C\uDFA4 ${text}`, sender: "user" } } });
       } else if (msg.type === "heartbeat") {
         // ignorieren
       } else {
@@ -945,6 +950,28 @@ const server = http.createServer((req, res) => {
   } else if (req.url === "/api/session") {
     res.writeHead(200, { "Content-Type": "application/json" });
     res.end(JSON.stringify({ sessionKey: activeSessionKey }));
+  } else if (req.url.startsWith("/shared/")) {
+    // Dateien aus Shared Volume ausliefern (Bilder, Uploads)
+    const filePath = decodeURIComponent(req.url);
+    const safePath = path.resolve(filePath);
+    if (!safePath.startsWith("/shared/")) {
+      res.writeHead(403);
+      res.end("Forbidden");
+      return;
+    }
+    try {
+      if (!fs.existsSync(safePath)) { res.writeHead(404); res.end("Not Found"); return; }
+      const ext = path.extname(safePath).toLowerCase();
+      const mimeTypes = { ".jpg": "image/jpeg", ".jpeg": "image/jpeg", ".png": "image/png", ".gif": "image/gif",
+                          ".pdf": "application/pdf", ".txt": "text/plain", ".json": "application/json" };
+      const contentType = mimeTypes[ext] || "application/octet-stream";
+      const data = fs.readFileSync(safePath);
+      res.writeHead(200, { "Content-Type": contentType, "Content-Length": data.length });
+      res.end(data);
+    } catch (err) {
+      res.writeHead(500);
+      res.end("Error");
+    }
   } else {
     res.writeHead(404);
     res.end("Not Found");