Web & Desktop home UIs render no projects/sessions against a headless server (v1.18.19) although GET /project returns the registered git project

Environment

• opencode web v1.18.19 headless on Ubuntu 24.04 (systemd), --hostname 127.0.0.1 --port 4096, WorkingDirectory set to a git repository (/opt/data/aicoding/repos/ai-prentice-4-all).
• Clients tested: web UI via HTTPS reverse proxy (Chrome, normal + private windows), Desktop app 1.18.x (macOS arm64) connected via defaultServerUrl (tunnel), TUI via opencode attach.

Expected

Home UI lists the server's project (the git repo) and its sessions; "+"/Add project usable.

Actual

• Web home shows Nothing here yet / Create a session to get started; Add project greyed; no project nodes (also with ?directory=<repo> in the URL and in a clean private window).
• Desktop shows the server as connected (green dot, Default Server) but lists no sessions/projects; its Add project opens the local OS file picker (useless for a remote server).
• TUI (opencode attach) works fine and lists sessions — so the server itself is healthy.

Evidence (server side is correct)

GET /project returns:

[{"id":"global","worktree":"/"},{"id":"76860fc1…","worktree":"/opt/data/aicoding/repos/ai-prentice-4-all","vcs":"git","sandboxes":[…]}]

GET /session?directory=<repo> returns sessions with that projectID. GET /global/health = {"healthy":true}.

Tried

• POST /session?directory=<repo> (registers project correctly; UI still empty).
• POST /experimental/workspace {"type":"worktree"} → WorkspaceCreateError: Timed out waiting for global event (and, before the project existed, Worktrees are only supported for git projects).
• Setting server cwd to the git repo (project then auto-registers; UI still empty).
• Private/incognito windows; hard reloads.

Impact

Headless deployments (the documented opencode serve/opencode web use-case) have no usable web/desktop home; only the TUI works. Related: #7790, #7371.

Suggestion

Home should render GET /project results regardless of workspace layer; web needs a server-side directory picker instead of the OS picker; workspace creation should not hang (Timed out waiting for global event).