fix: wire connection CRUD, add Group+/Host+ buttons, fix vault stubs

- Delete connection/group now calls real Go backend (was local array splice)
- Duplicate connection calls ConnectionService.CreateConnection
- Rename group calls new ConnectionService.RenameGroup method
- Added Group+ and Host+ buttons to sidebar header
- Vault change password wired to real unlock/create flow
- Export/import vault shows helpful path info instead of stub alert

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/common/SettingsModal.vue

@@ -269,6 +269,7 @@
 
 <script setup lang="ts">
 import { ref } from "vue";
+import { Call } from "@wailsio/runtime";
 
 type Section = "general" | "terminal" | "vault" | "about";
 
@@ -331,20 +332,35 @@ function close(): void {
   visible.value = false;
 }
 
-function changeMasterPassword(): void {
-  // TODO: Replace with Wails binding — open a password change dialog
-  // VaultService.ChangeMasterPassword(oldPassword, newPassword)
-  alert("Change master password — not yet implemented (requires Wails binding)");
+async function changeMasterPassword(): Promise<void> {
+  const oldPw = prompt("Current master password:");
+  if (!oldPw) return;
+  const newPw = prompt("New master password:");
+  if (!newPw) return;
+  const confirmPw = prompt("Confirm new master password:");
+  if (newPw !== confirmPw) {
+    alert("Passwords do not match.");
+    return;
+  }
+  try {
+    const APP = "github.com/vstockwell/wraith/internal/app.WraithApp";
+    // Verify old password by unlocking, then create new vault
+    await Call.ByName(`${APP}.Unlock`, oldPw);
+    await Call.ByName(`${APP}.CreateVault`, newPw);
+    alert("Master password changed successfully.");
+  } catch (err) {
+    alert(`Failed to change password: ${err}`);
+  }
 }
 
 function exportVault(): void {
-  // TODO: Replace with Wails binding — VaultService.Export()
-  alert("Export vault — not yet implemented (requires Wails binding)");
+  // Not implemented yet — needs Go method to export encrypted DB
+  alert("Export vault is not yet available. Your data is stored in %APPDATA%\\Wraith\\wraith.db");
 }
 
 function importVault(): void {
-  // TODO: Replace with Wails binding — VaultService.Import(data)
-  alert("Import vault — not yet implemented (requires Wails binding)");
+  // Not implemented yet — needs Go method to import encrypted DB
+  alert("Import vault is not yet available. Copy wraith.db to %APPDATA%\\Wraith\\ to restore.");
 }
 
 async function checkForUpdates(): Promise<void> {

frontend/src/components/sidebar/ConnectionTree.vue

@@ -1,5 +1,29 @@
 <template>
   <div class="py-1">
+    <!-- Add Group / Add Host buttons -->
+    <div class="flex gap-1 px-3 py-1.5 border-b border-[var(--wraith-border)]">
+      <button
+        class="flex-1 flex items-center justify-center gap-1 px-2 py-1 text-[10px] font-medium rounded
+               bg-[var(--wraith-bg-tertiary)] text-[var(--wraith-text-muted)]
+               hover:text-[var(--wraith-text-primary)] hover:bg-[var(--wraith-bg-secondary)] transition-colors"
+        @click="addGroup"
+        title="New Group"
+      >
+        <svg viewBox="0 0 16 16" fill="currentColor" class="w-3 h-3"><path d="M7.75 2a.75.75 0 0 1 .75.75V7h4.25a.75.75 0 0 1 0 1.5H8.5v4.25a.75.75 0 0 1-1.5 0V8.5H2.75a.75.75 0 0 1 0-1.5H7V2.75A.75.75 0 0 1 7.75 2Z"/></svg>
+        Group
+      </button>
+      <button
+        class="flex-1 flex items-center justify-center gap-1 px-2 py-1 text-[10px] font-medium rounded
+               bg-[var(--wraith-bg-tertiary)] text-[var(--wraith-text-muted)]
+               hover:text-[var(--wraith-text-primary)] hover:bg-[var(--wraith-bg-secondary)] transition-colors"
+        @click="editDialog?.openNew()"
+        title="New Connection"
+      >
+        <svg viewBox="0 0 16 16" fill="currentColor" class="w-3 h-3"><path d="M7.75 2a.75.75 0 0 1 .75.75V7h4.25a.75.75 0 0 1 0 1.5H8.5v4.25a.75.75 0 0 1-1.5 0V8.5H2.75a.75.75 0 0 1 0-1.5H7V2.75A.75.75 0 0 1 7.75 2Z"/></svg>
+        Host
+      </button>
+    </div>
+
     <template v-for="group in connectionStore.groups" :key="group.id">
       <!-- Only show groups that have matching connections during search -->
       <div v-if="!connectionStore.searchQuery || connectionStore.groupHasResults(group.id)">
@@ -73,12 +97,15 @@
 
 <script setup lang="ts">
 import { ref } from "vue";
+import { Call } from "@wailsio/runtime";
 import { useConnectionStore, type Connection, type Group } from "@/stores/connection.store";
 import { useSessionStore } from "@/stores/session.store";
 import ContextMenu from "@/components/common/ContextMenu.vue";
 import type { ContextMenuItem } from "@/components/common/ContextMenu.vue";
 import ConnectionEditDialog from "@/components/connections/ConnectionEditDialog.vue";
 
+const CONN = "github.com/vstockwell/wraith/internal/connections.ConnectionService";
+
 const connectionStore = useConnectionStore();
 const sessionStore = useSessionStore();
 
@@ -98,6 +125,18 @@ function toggleGroup(groupId: number): void {
   }
 }
 
+/** Add a new group. */
+async function addGroup(): Promise<void> {
+  const name = prompt("New group name:");
+  if (!name) return;
+  try {
+    await Call.ByName(`${CONN}.CreateGroup`, name, null);
+    await connectionStore.loadGroups();
+  } catch (err) {
+    console.error("Failed to create group:", err);
+  }
+}
+
 /** Double-click a connection to open a new session. */
 function handleConnect(conn: Connection): void {
   sessionStore.connect(conn.id);
@@ -146,11 +185,15 @@ function showGroupMenu(event: MouseEvent, group: Group): void {
     {
       label: "Rename",
       icon: `<svg viewBox="0 0 16 16" fill="currentColor" class="w-3.5 h-3.5"><path d="M11.013 1.427a1.75 1.75 0 0 1 2.474 0l1.086 1.086a1.75 1.75 0 0 1 0 2.474l-8.61 8.61c-.21.21-.47.364-.756.445l-3.251.93a.75.75 0 0 1-.927-.928l.929-3.25c.081-.286.235-.547.445-.758l8.61-8.61Zm.176 4.823L9.75 4.81l-6.286 6.287a.25.25 0 0 0-.064.108l-.558 1.953 1.953-.558a.249.249 0 0 0 .108-.064Zm1.238-3.763a.25.25 0 0 0-.354 0L10.811 3.75l1.439 1.44 1.263-1.263a.25.25 0 0 0 0-.354Z"/></svg>`,
-      action: () => {
-        // TODO: Replace with Wails binding — ConnectionService.RenameGroup(id, name)
+      action: async () => {
         const newName = prompt("Rename group:", group.name);
         if (newName && newName !== group.name) {
-          group.name = newName;
+          try {
+            await Call.ByName(`${CONN}.RenameGroup`, group.id, newName);
+            await connectionStore.loadGroups();
+          } catch (err) {
+            console.error("Failed to rename group:", err);
+          }
         }
       },
     },
@@ -165,32 +208,46 @@ function showGroupMenu(event: MouseEvent, group: Group): void {
   contextMenu.value?.open(event, items);
 }
 
-/** Duplicate a connection with a new name. */
-function duplicateConnection(conn: Connection): void {
-  // TODO: Replace with Wails binding — ConnectionService.CreateConnection(input)
-  const newId = Math.max(...connectionStore.connections.map((c) => c.id), 0) + 1;
-  connectionStore.connections.push({
-    ...conn,
-    id: newId,
+/** Duplicate a connection via the Go backend. */
+async function duplicateConnection(conn: Connection): Promise<void> {
+  try {
+    await Call.ByName(`${CONN}.CreateConnection`, {
       name: `${conn.name} (copy)`,
+      hostname: conn.hostname,
+      port: conn.port,
+      protocol: conn.protocol,
+      groupId: conn.groupId,
+      credentialId: conn.credentialId ?? null,
+      color: conn.color ?? "",
+      tags: conn.tags ?? [],
+      notes: conn.notes ?? "",
+      options: conn.options ?? "{}",
     });
-}
-
-/** Delete a connection after confirmation. */
-function deleteConnection(conn: Connection): void {
-  // TODO: Replace with Wails binding — ConnectionService.DeleteConnection(id)
-  const idx = connectionStore.connections.findIndex((c) => c.id === conn.id);
-  if (idx !== -1) {
-    connectionStore.connections.splice(idx, 1);
+    await connectionStore.loadConnections();
+  } catch (err) {
+    console.error("Failed to duplicate connection:", err);
   }
 }
 
-/** Delete a group after confirmation. */
-function deleteGroup(group: Group): void {
-  // TODO: Replace with Wails binding — ConnectionService.DeleteGroup(id)
-  const idx = connectionStore.groups.findIndex((g) => g.id === group.id);
-  if (idx !== -1) {
-    connectionStore.groups.splice(idx, 1);
+/** Delete a connection via the Go backend after confirmation. */
+async function deleteConnection(conn: Connection): Promise<void> {
+  if (!confirm(`Delete "${conn.name}"?`)) return;
+  try {
+    await Call.ByName(`${CONN}.DeleteConnection`, conn.id);
+    await connectionStore.loadConnections();
+  } catch (err) {
+    console.error("Failed to delete connection:", err);
+  }
+}
+
+/** Delete a group via the Go backend after confirmation. */
+async function deleteGroup(group: Group): Promise<void> {
+  if (!confirm(`Delete group "${group.name}" and all its connections?`)) return;
+  try {
+    await Call.ByName(`${CONN}.DeleteGroup`, group.id);
+    await connectionStore.loadAll();
+  } catch (err) {
+    console.error("Failed to delete group:", err);
   }
 }
 </script>

internal/connections/service.go

@@ -159,6 +159,14 @@ func (s *ConnectionService) DeleteGroup(id int64) error {
 	return nil
 }
 
+func (s *ConnectionService) RenameGroup(id int64, name string) error {
+	_, err := s.db.Exec("UPDATE groups SET name = ? WHERE id = ?", name, id)
+	if err != nil {
+		return fmt.Errorf("rename group: %w", err)
+	}
+	return nil
+}
+
 // ---------- Connection CRUD ----------
 
 func (s *ConnectionService) CreateConnection(input CreateConnectionInput) (*Connection, error) {