feat: sortable workspace tabs, tab context menus, and terminal auto-create removal

- Add drag-and-drop tab reordering with persistent tab order
- Add right-click context menu with copy agent ID, copy resume command, close to right
- Switch workspace route encoding from percent-encoding to base64url
- Remove terminal auto-creation on directory listing (explicit create only)
- Add swipe gestures on terminal emulator for mobile sidebar navigation
- Highlight active workspace row in sidebar

packages/app/src/utils/host-routes.test.ts

@@ -1,5 +1,8 @@
 import { describe, expect, it } from "vitest";
 import {
+  buildHostWorkspaceRoute,
+  decodeWorkspaceIdFromPathSegment,
+  encodeWorkspaceIdForPathSegment,
   parseHostAgentDraftRouteFromPathname,
   parseHostAgentRouteFromPathname,
   parseHostDraftRouteFromPathname,
@@ -46,9 +49,14 @@ describe("parseHostAgentRouteFromPathname", () => {
 });
 
 describe("workspace route parsing", () => {
+  it("encodes workspace IDs as base64url (no padding)", () => {
+    expect(encodeWorkspaceIdForPathSegment("/tmp/repo")).toBe("L3RtcC9yZXBv");
+    expect(decodeWorkspaceIdFromPathSegment("L3RtcC9yZXBv")).toBe("/tmp/repo");
+  });
+
   it("parses workspace route", () => {
     expect(
-      parseHostWorkspaceRouteFromPathname("/h/local/workspace/%2Ftmp%2Frepo")
+      parseHostWorkspaceRouteFromPathname("/h/local/workspace/L3RtcC9yZXBv")
     ).toEqual({
       serverId: "local",
       workspaceId: "/tmp/repo",
@@ -58,7 +66,7 @@ describe("workspace route parsing", () => {
   it("parses workspace agent route", () => {
     expect(
       parseHostWorkspaceAgentRouteFromPathname(
-        "/h/local/workspace/%2Ftmp%2Frepo/agent/agent-1"
+        "/h/local/workspace/L3RtcC9yZXBv/agent/agent-1"
       )
     ).toEqual({
       serverId: "local",
@@ -70,7 +78,7 @@ describe("workspace route parsing", () => {
   it("parses workspace terminal route", () => {
     expect(
       parseHostWorkspaceTerminalRouteFromPathname(
-        "/h/local/workspace/%2Ftmp%2Frepo/terminal/term-1"
+        "/h/local/workspace/L3RtcC9yZXBv/terminal/term-1"
       )
     ).toEqual({
       serverId: "local",
@@ -78,4 +86,22 @@ describe("workspace route parsing", () => {
       terminalId: "term-1",
     });
   });
+
+  it("still parses legacy percent-encoded workspace routes", () => {
+    expect(
+      parseHostWorkspaceAgentRouteFromPathname(
+        "/h/local/workspace/%2Ftmp%2Frepo/agent/agent-1"
+      )
+    ).toEqual({
+      serverId: "local",
+      workspaceId: "/tmp/repo",
+      agentId: "agent-1",
+    });
+  });
+
+  it("builds base64url workspace routes", () => {
+    expect(buildHostWorkspaceRoute("local", "/tmp/repo")).toBe(
+      "/h/local/workspace/L3RtcC9yZXBv"
+    );
+  });
 });