fix: support image drop and paste in terminal

Allow drag/drop and clipboard image paste in the dashboard terminal so users can quickly upload images into the active shell session, with a visible hint for discoverability.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

dashboard/frontend/src/routes/Terminal.svelte

@@ -16,6 +16,57 @@
   let tabCounter = 0;
   const tabData = new Map();
 
+  function cleanName(name) {
+    return (name || "image")
+      .replace(/[^a-zA-Z0-9._-]/g, "-")
+      .replace(/-+/g, "-")
+      .replace(/^-|-$/g, "") || "image";
+  }
+
+  function extensionFor(type) {
+    if (type === "image/png") return "png";
+    if (type === "image/jpeg") return "jpg";
+    if (type === "image/webp") return "webp";
+    if (type === "image/gif") return "gif";
+    return "bin";
+  }
+
+  async function fileToBase64(file) {
+    const buf = await file.arrayBuffer();
+    let binary = "";
+    const bytes = new Uint8Array(buf);
+    const chunkSize = 0x8000;
+    for (let i = 0; i < bytes.length; i += chunkSize) {
+      binary += String.fromCharCode(...bytes.subarray(i, i + chunkSize));
+    }
+    return btoa(binary);
+  }
+
+  async function sendDroppedImage(term, ws, file) {
+    if (!file?.type?.startsWith("image/")) return;
+    if (ws.readyState !== 1) return;
+
+    const ext = extensionFor(file.type);
+    const baseName = cleanName(file.name).replace(/\.[a-zA-Z0-9]+$/, "");
+    const stamp = Date.now();
+    const imagePath = `/tmp/claude-images/${baseName || "image"}-${stamp}.${ext}`;
+    const b64 = await fileToBase64(file);
+
+    const cmd = [
+      "python3 - <<'PY'",
+      "import base64, pathlib",
+      `p = pathlib.Path(${JSON.stringify(imagePath)})`,
+      "p.parent.mkdir(parents=True, exist_ok=True)",
+      `p.write_bytes(base64.b64decode(${JSON.stringify(b64)}))`,
+      `print(f'saved image -> {p}')`,
+      "PY",
+      "",
+    ].join("\n");
+
+    ws.send(new TextEncoder().encode(cmd));
+    term.write(`\r\n\x1b[90m[Uploaded image to ${imagePath}]\x1b[0m\r\n`);
+  }
+
   function addTab(hostId) {
     const id = ++tabCounter;
     const label = hosts.find((h) => h.id === hostId).label;
@@ -29,6 +80,9 @@
     if (d) {
       d.voice?.destroy();
       d.ro?.disconnect();
+      d.term?.element?.removeEventListener("dragover", d.handleDragOver);
+      d.term?.element?.removeEventListener("drop", d.handleDrop);
+      d.term?.textarea?.removeEventListener("paste", d.handlePaste);
       d.ws?.close();
       d.term?.dispose();
       tabData.delete(id);
@@ -89,17 +143,52 @@
       ws.onerror = () => updateTab(tabId, { connected: false, error: "Connection failed" });
       term.onData((data) => ws.readyState === 1 && ws.send(new TextEncoder().encode(data)));
 
+      const handleDragOver = (e) => {
+        e.preventDefault();
+      };
+
+      const handleDrop = async (e) => {
+        e.preventDefault();
+        if (activeTab !== tabId) return;
+        const files = [...(e.dataTransfer?.files || [])].filter((f) => f.type?.startsWith("image/"));
+        for (const file of files) {
+          await sendDroppedImage(term, ws, file);
+        }
+      };
+
+      const handlePaste = async (e) => {
+        if (activeTab !== tabId) return;
+        const items = [...(e.clipboardData?.items || [])]
+          .filter((it) => it.kind === "file" && it.type?.startsWith("image/"));
+        for (const item of items) {
+          const file = item.getAsFile();
+          if (file) await sendDroppedImage(term, ws, file);
+        }
+      };
+
+      term.element?.addEventListener("dragover", handleDragOver);
+      term.element?.addEventListener("drop", handleDrop);
+      term.textarea?.addEventListener("paste", handlePaste);
+
       const ro = new ResizeObserver(() => { fit.fit(); sendSize(); });
       ro.observe(el);
       const voice = new VoiceSession(() => { voiceTick++; });
       voice.attach(term, ws);
-      tabData.set(tabId, { ws, term, ro, el, voice });
+      tabData.set(tabId, { ws, term, ro, el, voice, handleDragOver, handleDrop, handlePaste });
     })();
   }
 
   function activeVoice() { return voiceTick >= 0 && tabData.get(activeTab)?.voice; }
 
-  onDestroy(() => tabData.forEach((d) => { d.voice?.destroy(); d.ro?.disconnect(); d.ws?.close(); d.term?.dispose(); }));
+  onDestroy(() => tabData.forEach((d) => {
+    d.voice?.destroy();
+    d.ro?.disconnect();
+    d.term?.element?.removeEventListener("dragover", d.handleDragOver);
+    d.term?.element?.removeEventListener("drop", d.handleDrop);
+    d.term?.textarea?.removeEventListener("paste", d.handlePaste);
+    d.ws?.close();
+    d.term?.dispose();
+  }));
 </script>
 <div class={activeVoice()?.voiceMode ? 'flex flex-col h-[calc(100vh-4rem)] overflow-hidden gap-1' : 'space-y-2'}>
   {#if !activeVoice()?.voiceMode}
@@ -160,6 +249,10 @@
     {/if}
   </div>
 
+  <p class="text-xs text-surface-500">
+    Tip: drag & drop or paste images into the active terminal tab to upload them to <code class="text-surface-400">/tmp/claude-images</code>.
+  </p>
+
   {#if !tabs.length}
     <div class="flex items-center justify-center h-[calc(100vh-12rem)] text-surface-500 text-sm">
       Click + to open a terminal