NotFoundError on startup: session JSON files not found in storage #12889

Description

When launching opencode-desktop on Linux (Wayland/X11), the app throws NotFoundError for session JSON files that don't exist yet in the storage directory.

Environment

• OS: Linux (Arch/CachyOS), Kernel 6.18.9
• Desktop: Wayland (forced X11 via WEBKIT_DISABLE_DMABUF_RENDERER=1)
• CLI version: 1.1.53
• App version: 1.1.53

Steps to Reproduce

1. Run WEBKIT_DISABLE_DMABUF_RENDERER=1 opencode-desktop
2. App starts, sidecar spawns on a port, server becomes ready
3. Two NotFoundError exceptions are thrown immediately

Error Output

opencode server listening on http://127.0.0.1:35895
Server ready after 662.897834ms

NotFoundError: NotFoundError
 data: {
  message: "Resource not found: /home/<user>/.local/share/opencode/storage/session/global/ses_3baf5522dffeiWPuSV70LW2NXb.json",
},
      at <anonymous> (src/storage/storage.ts:205:15)

NotFoundError: NotFoundError
 data: {
  message: "Resource not found: /home/<user>/.local/share/opencode/storage/session/global/ses_3baf4d5d4ffegHx1UI2qa9a5OS.json",
},
      at <anonymous> (src/storage/storage.ts:205:15)

Analysis

The error originates from src/storage/storage.ts:205 in the withErrorHandling wrapper. It catches ENOENT errors and re-throws as NotFoundError.

It appears the app tries to read session files (ses_*.json) that don't exist on disk. This could be:

1. Stale session references pointing to deleted/missing files
2. Missing graceful handling for first-run or cleaned storage scenarios
3. Session index referencing IDs whose backing files were never created or were cleaned up

Expected Behavior

The app should handle missing session files gracefully — either by creating them, removing stale references, or silently skipping — instead of throwing unhandled NotFoundError exceptions to stderr.

Additional Context

The Wayland warning is unrelated:

"Wayland session detected; forcing X11 backend to avoid compositor protocol errors. Set OC_ALLOW_WAYLAND=1 to keep native Wayland."