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/server/src/terminal/terminal-manager.ts

@@ -35,7 +35,6 @@ export function createTerminalManager(): TerminalManager {
   const terminalExitUnsubscribeById = new Map<string, () => void>();
   const terminalsChangedListeners = new Set<TerminalsChangedListener>();
   const defaultEnvByRootCwd = new Map<string, Record<string, string>>();
-  const knownDirectories = new Set<string>();
 
   function assertAbsolutePath(cwd: string): void {
     if (!cwd.startsWith("/")) {
@@ -135,28 +134,7 @@ export function createTerminalManager(): TerminalManager {
     async getTerminals(cwd: string): Promise<TerminalSession[]> {
       assertAbsolutePath(cwd);
 
-      const terminals = terminalsByCwd.get(cwd);
-      if (terminals && terminals.length > 0) {
-        return terminals;
-      }
-
-      if (!knownDirectories.has(cwd)) {
-        const inheritedEnv = resolveDefaultEnvForCwd(cwd);
-        const session = registerSession(
-          await createTerminal({
-            cwd,
-            name: "Terminal 1",
-            ...(inheritedEnv ? { env: inheritedEnv } : {}),
-          })
-        );
-        const created = [session];
-        terminalsByCwd.set(cwd, created);
-        knownDirectories.add(cwd);
-        emitTerminalsChanged({ cwd });
-        return created;
-      }
-
-      return [];
+      return terminalsByCwd.get(cwd) ?? [];
     },
 
     async createTerminal(options: {
@@ -166,7 +144,6 @@ export function createTerminalManager(): TerminalManager {
     }): Promise<TerminalSession> {
       assertAbsolutePath(options.cwd);
 
-      knownDirectories.add(options.cwd);
       const terminals = terminalsByCwd.get(options.cwd) ?? [];
       const defaultName = `Terminal ${terminals.length + 1}`;
       const inheritedEnv = resolveDefaultEnvForCwd(options.cwd);
@@ -203,14 +180,13 @@ export function createTerminalManager(): TerminalManager {
     },
 
     listDirectories(): string[] {
-      return Array.from(knownDirectories);
+      return Array.from(terminalsByCwd.keys());
     },
 
     killAll(): void {
       for (const id of Array.from(terminalsById.keys())) {
         removeSessionById(id, { kill: true });
       }
-      knownDirectories.clear();
     },
 
     subscribeTerminalsChanged(listener: TerminalsChangedListener): () => void {