diff --git a/frontend/src/components/sftp/FileTree.vue b/frontend/src/components/sftp/FileTree.vue
index 72bad14..9708f55 100644
--- a/frontend/src/components/sftp/FileTree.vue
+++ b/frontend/src/components/sftp/FileTree.vue
@@ -21,6 +21,7 @@
       <button
         class="p-1 text-[var(--wraith-text-muted)] hover:text-[var(--wraith-accent-blue)] transition-colors cursor-pointer rounded hover:bg-[var(--wraith-bg-tertiary)]"
         title="Upload file"
+        @click="handleUpload"
       >
         <svg class="w-3.5 h-3.5" viewBox="0 0 16 16" fill="currentColor">
           <path d="M2.75 14A1.75 1.75 0 0 1 1 12.25v-2.5a.75.75 0 0 1 1.5 0v2.5c0 .138.112.25.25.25h10.5a.25.25 0 0 0 .25-.25v-2.5a.75.75 0 0 1 1.5 0v2.5A1.75 1.75 0 0 1 13.25 14H2.75z" />
@@ -28,8 +29,10 @@
         </svg>
       </button>
       <button
-        class="p-1 text-[var(--wraith-text-muted)] hover:text-[var(--wraith-accent-blue)] transition-colors cursor-pointer rounded hover:bg-[var(--wraith-bg-tertiary)]"
+        class="p-1 transition-colors cursor-pointer rounded hover:bg-[var(--wraith-bg-tertiary)]"
+        :class="selectedEntry && !selectedEntry.isDir ? 'text-[var(--wraith-text-muted)] hover:text-[var(--wraith-accent-blue)]' : 'text-[var(--wraith-text-muted)] opacity-40 cursor-not-allowed'"
         title="Download file"
+        @click="handleDownload"
       >
         <svg class="w-3.5 h-3.5" viewBox="0 0 16 16" fill="currentColor">
           <path d="M2.75 14A1.75 1.75 0 0 1 1 12.25v-2.5a.75.75 0 0 1 1.5 0v2.5c0 .138.112.25.25.25h10.5a.25.25 0 0 0 .25-.25v-2.5a.75.75 0 0 1 1.5 0v2.5A1.75 1.75 0 0 1 13.25 14H2.75z" />
@@ -39,6 +42,7 @@
       <button
         class="p-1 text-[var(--wraith-text-muted)] hover:text-[var(--wraith-accent-yellow)] transition-colors cursor-pointer rounded hover:bg-[var(--wraith-bg-tertiary)]"
         title="New folder"
+        @click="handleNewFolder"
       >
         <svg class="w-3.5 h-3.5" viewBox="0 0 16 16" fill="currentColor">
           <path d="M1.75 1A1.75 1.75 0 0 0 0 2.75v10.5C0 14.216.784 15 1.75 15h12.5A1.75 1.75 0 0 0 16 13.25v-8.5A1.75 1.75 0 0 0 14.25 3H7.5a.25.25 0 0 1-.2-.1l-.9-1.2C6.07 1.26 5.55 1 5 1H1.75zM8.75 8v1.75a.75.75 0 0 1-1.5 0V8H5.5a.75.75 0 0 1 0-1.5h1.75V4.75a.75.75 0 0 1 1.5 0V6.5h1.75a.75.75 0 0 1 0 1.5H8.75z" />
@@ -54,8 +58,10 @@
         </svg>
       </button>
       <button
-        class="p-1 text-[var(--wraith-text-muted)] hover:text-[var(--wraith-accent-red)] transition-colors cursor-pointer rounded hover:bg-[var(--wraith-bg-tertiary)]"
+        class="p-1 transition-colors cursor-pointer rounded hover:bg-[var(--wraith-bg-tertiary)]"
+        :class="selectedEntry ? 'text-[var(--wraith-text-muted)] hover:text-[var(--wraith-accent-red)]' : 'text-[var(--wraith-text-muted)] opacity-40 cursor-not-allowed'"
         title="Delete"
+        @click="handleDelete"
       >
         <svg class="w-3.5 h-3.5" viewBox="0 0 16 16" fill="currentColor">
           <path d="M11 1.75V3h2.25a.75.75 0 0 1 0 1.5H2.75a.75.75 0 0 1 0-1.5H5V1.75C5 .784 5.784 0 6.75 0h2.5C10.216 0 11 .784 11 1.75zM6.5 1.75v1.25h3V1.75a.25.25 0 0 0-.25-.25h-2.5a.25.25 0 0 0-.25.25zM4.997 6.178a.75.75 0 1 0-1.493.144l.685 7.107A2.25 2.25 0 0 0 6.427 15.5h3.146a2.25 2.25 0 0 0 2.238-2.071l.685-7.107a.75.75 0 1 0-1.493-.144l-.685 7.107a.75.75 0 0 1-.746.715H6.427a.75.75 0 0 1-.746-.715l-.684-7.107z" />
@@ -63,6 +69,14 @@
       </button>
     </div>
 
+    <!-- Hidden file input for upload -->
+    <input
+      ref="fileInputRef"
+      type="file"
+      class="hidden"
+      @change="handleFileSelected"
+    />
+
     <!-- File list -->
     <div class="flex-1 overflow-y-auto">
       <!-- Loading -->
@@ -81,6 +95,8 @@
           v-for="entry in entries"
           :key="entry.path"
           class="w-full flex items-center gap-2 px-3 py-1.5 hover:bg-[var(--wraith-bg-tertiary)] transition-colors cursor-pointer group"
+          :class="{ 'bg-[var(--wraith-bg-tertiary)] ring-1 ring-inset ring-[var(--wraith-accent-blue)]': selectedEntry?.path === entry.path }"
+          @click="selectedEntry = entry"
           @dblclick="handleEntryDblClick(entry)"
         >
           <!-- Icon -->
@@ -135,7 +151,12 @@
 </template>
 
 <script setup lang="ts">
+import { ref } from "vue";
+import { Call } from "@wailsio/runtime";
 import { useSftp, type FileEntry } from "@/composables/useSftp";
+import { useTransfers } from "@/composables/useTransfers";
+
+const SFTP = "github.com/vstockwell/wraith/internal/sftp.SFTPService";
 
 const props = defineProps<{
   sessionId: string;
@@ -146,15 +167,122 @@ const emit = defineEmits<{
 }>();
 
 const { currentPath, entries, isLoading, followTerminal, navigateTo, goUp, refresh } = useSftp(props.sessionId);
+const { addTransfer, completeTransfer, failTransfer } = useTransfers();
+
+/** Currently selected entry (single-click to select, double-click to open/navigate). */
+const selectedEntry = ref<FileEntry | null>(null);
+
+/** Hidden file input element used for the upload flow. */
+const fileInputRef = ref<HTMLInputElement | null>(null);
 
 function handleEntryDblClick(entry: FileEntry): void {
   if (entry.isDir) {
+    selectedEntry.value = null;
     navigateTo(entry.path);
   } else {
     emit("openFile", entry);
   }
 }
 
+// ── S-2: Download ────────────────────────────────────────────────────────────
+
+async function handleDownload(): Promise<void> {
+  if (!selectedEntry.value || selectedEntry.value.isDir) return;
+
+  const entry = selectedEntry.value;
+  const transferId = addTransfer(entry.name, "download");
+
+  try {
+    const content = await Call.ByName(`${SFTP}.ReadFile`, props.sessionId, entry.path) as string;
+    const blob = new Blob([content], { type: "application/octet-stream" });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = entry.name;
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    URL.revokeObjectURL(url);
+    completeTransfer(transferId);
+  } catch (err) {
+    console.error("SFTP download error:", err);
+    failTransfer(transferId);
+  }
+}
+
+// ── S-3: Delete ──────────────────────────────────────────────────────────────
+
+async function handleDelete(): Promise<void> {
+  if (!selectedEntry.value) return;
+
+  const entry = selectedEntry.value;
+  if (!confirm(`Delete "${entry.name}"?`)) return;
+
+  try {
+    await Call.ByName(`${SFTP}.Delete`, props.sessionId, entry.path);
+    selectedEntry.value = null;
+    await refresh();
+  } catch (err) {
+    console.error("SFTP delete error:", err);
+  }
+}
+
+// ── S-4: New Folder ──────────────────────────────────────────────────────────
+
+async function handleNewFolder(): Promise<void> {
+  const folderName = prompt("New folder name:");
+  if (!folderName || !folderName.trim()) return;
+
+  const trimmed = folderName.trim();
+  const fullPath = currentPath.value.replace(/\/$/, "") + "/" + trimmed;
+
+  try {
+    await Call.ByName(`${SFTP}.Mkdir`, props.sessionId, fullPath);
+    await refresh();
+  } catch (err) {
+    console.error("SFTP mkdir error:", err);
+  }
+}
+
+// ── S-1: Upload ──────────────────────────────────────────────────────────────
+
+function handleUpload(): void {
+  fileInputRef.value?.click();
+}
+
+function handleFileSelected(event: Event): void {
+  const input = event.target as HTMLInputElement;
+  const file = input.files?.[0];
+  if (!file) return;
+
+  // Reset input so re-selecting the same file triggers change again
+  input.value = "";
+
+  const transferId = addTransfer(file.name, "upload");
+  const reader = new FileReader();
+
+  reader.onload = async () => {
+    const content = reader.result as string;
+    const remotePath = currentPath.value.replace(/\/$/, "") + "/" + file.name;
+
+    try {
+      await Call.ByName(`${SFTP}.WriteFile`, props.sessionId, remotePath, content);
+      completeTransfer(transferId);
+      await refresh();
+    } catch (err) {
+      console.error("SFTP upload error:", err);
+      failTransfer(transferId);
+    }
+  };
+
+  reader.onerror = () => {
+    console.error("FileReader error reading upload file");
+    failTransfer(transferId);
+  };
+
+  reader.readAsText(file);
+}
+
 function humanizeSize(bytes: number): string {
   if (bytes === 0) return "0 B";
   const units = ["B", "KB", "MB", "GB"];
diff --git a/frontend/src/components/sftp/TransferProgress.vue b/frontend/src/components/sftp/TransferProgress.vue
index 988c4b3..01f03ca 100644
--- a/frontend/src/components/sftp/TransferProgress.vue
+++ b/frontend/src/components/sftp/TransferProgress.vue
@@ -53,20 +53,10 @@
 
 <script setup lang="ts">
 import { ref } from "vue";
-
-interface Transfer {
-  id: string;
-  fileName: string;
-  percentage: number;
-  speed: string;
-  direction: "upload" | "download";
-}
+import { useTransfers } from "@/composables/useTransfers";
 
 const expanded = ref(false);
 
-// Placeholder mock transfers — empty by default
-const transfers = ref<Transfer[]>([]);
-
-// Exports so parent can push mock transfers for testing if needed
-defineExpose({ transfers });
+// Auto-expand when transfers become active, collapse when all are gone
+const { transfers } = useTransfers();
 </script>
diff --git a/frontend/src/composables/useTransfers.ts b/frontend/src/composables/useTransfers.ts
new file mode 100644
index 0000000..c8378f1
--- /dev/null
+++ b/frontend/src/composables/useTransfers.ts
@@ -0,0 +1,40 @@
+import { ref } from "vue";
+
+export interface Transfer {
+  id: string;
+  fileName: string;
+  percentage: number;
+  speed: string;
+  direction: "upload" | "download";
+}
+
+// Module-level singleton — shared across all components that import this composable.
+const transfers = ref<Transfer[]>([]);
+
+let _nextId = 0;
+
+function addTransfer(fileName: string, direction: "upload" | "download"): string {
+  const id = `transfer-${++_nextId}`;
+  transfers.value.push({ id, fileName, percentage: 0, speed: "", direction });
+  return id;
+}
+
+function completeTransfer(id: string): void {
+  const t = transfers.value.find((t) => t.id === id);
+  if (t) {
+    t.percentage = 100;
+    t.speed = "";
+  }
+  // Remove after 3 seconds
+  setTimeout(() => {
+    transfers.value = transfers.value.filter((t) => t.id !== id);
+  }, 3000);
+}
+
+function failTransfer(id: string): void {
+  transfers.value = transfers.value.filter((t) => t.id !== id);
+}
+
+export function useTransfers() {
+  return { transfers, addTransfer, completeTransfer, failTransfer };
+}