fix(sessions): recover home-scoped list after fresh connect

* fix(sessions): use active connection client directly, remove roots filter

Root cause A: loadSessions was calling clientForDirectory(serverHome) which
scoped the session list to /home/azureuser — a different project than the
server's active CWD. Sessions in the current project (e.g. opencode-mobile)
were never returned.

Root cause B: roots:true filtered out sessions that have a parentID (sub-task /
AUTO-REVIEW sessions), hiding valid sessions from the list.

Fix: use connState.client directly (the connection's active directory) and drop
the roots filter so all sessions for that project are visible.

Also adds a verify_session_list CUA smoke scenario that navigates back to the
sessions tab after creating a session and asserts the list is non-empty —
covering the regression path that was previously untested.

* fix(sessions): fetch serverHome in addConnection so loadSessions shows correct sessions

Root cause: addConnection() built the HTTP client but never fetched serverHome
(only loadConnections and setActiveConnection did). When the user adds a new
connection (fresh install / first sign-in), serverHome = null, so loadSessions
fell through to connState.client (the server's CWD). On this dev server the CWD
is the deploy directory — 11 old May-19 sessions that are not the user's recent
work sessions.

Fix: addConnection now fetches currentProject + serverHome via the same
Promise.all as setActiveConnection, before calling set(). This ensures
loadSessions immediately uses clientForDirectory(serverHome) → the global
project → the user's actual recent parent sessions.

Also adds --opencode-url flag to the CUA smoke script, which appends a
connect_and_verify_sessions scenario that reproduces the regression:
  python scripts/android-cua-smoke.py --opencode-url http://100.108.64.76:4096

* fix(sessions): recover home scope after fresh connect

Resolve stale deploy-only session list by recovering server home during first load and keeping regression coverage in default Android CUA smoke and CI.

* chore(release): bump version to 0.4.0

app.json

@@ -2,7 +2,7 @@
   "expo": {
     "name": "OpenCode",
     "slug": "opencode-mobile",
-    "version": "0.3.2",
+    "version": "0.4.0",
     "orientation": "portrait",
     "scheme": "opencode",
     "userInterfaceStyle": "automatic",
@@ -34,7 +34,7 @@
     },
     "android": {
       "package": "ai.opencode.mobile",
-      "versionCode": 2,
+      "versionCode": 3,
       "usesCleartextTraffic": true,
       "adaptiveIcon": {
         "foregroundImage": "./assets/adaptive-icon.png",