Fix end-to-end startup: project registration, credentials, trust dialog, ready marker

- start.sh: auto-register project in ~/.config/context-studio/projects/ before
  launching Electron — without this acquireProjectLock() silently skips writing
  the lock file, waitForServers() never finds the registry port, all agent ports
  stay null (localhost:null errors)

- start.sh: mount all known Claude Code credential locations into container
  (~/.claude/.credentials.json, ~/.claude.json, $CLAUDE_CONFIG_DIR variants)
  not just ~/.anthropic which was empty on this system

- bin/claude: create /tmp/cs-ready-<agentId> on host after 3s delay so CS Core's
  CLI ready marker poll resolves instead of timing out after 10s

- workflow.sh: add hasTrustDialogAccepted:true to all agent settings.json so
  claude goes straight to priming without the folder trust dialog

- prereqs.sh: add ensure_api_key() — checks all credential locations, prompts
  with masked input if none found, offers to save to shell profile

- wizard.sh: trap SIGINT for graceful abort — gum confirm popup, reverts created
  project dir and cloned core dir, leaves installed packages untouched

- core.sh: set _WIZARD_CORE_CLONED=true before clone for cleanup tracking

- electron-config.js: increase serverStartupTimeout 30s→90s (config file in
  core/config/, not source — safe to edit)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

wizard.sh

@@ -155,10 +155,56 @@ confirm_summary() {
     if [[ "$_ok" != "y" ]]; then die "Aborted."; fi
 }
 
+# ── Cleanup state tracking ────────────────────────────────────────────────
+_WIZARD_CORE_CLONED=false
+_WIZARD_PROJECT_CREATED=false
+
+wizard_cleanup() {
+    local removed=false
+    if [[ "$_WIZARD_PROJECT_CREATED" == "true" && -n "${PROJECT_DIR:-}" && -d "$PROJECT_DIR" ]]; then
+        rm -rf "$PROJECT_DIR"
+        gum style --foreground "$C_GREEN" "  ✓  Removed $PROJECT_DIR"
+        removed=true
+    fi
+    if [[ "$_WIZARD_CORE_CLONED" == "true" && -d "$CS_CORE_DIR" ]]; then
+        rm -rf "$CS_CORE_DIR"
+        gum style --foreground "$C_GREEN" "  ✓  Removed $CS_CORE_DIR"
+        removed=true
+    fi
+    if [[ "$removed" == "false" ]]; then
+        gum style --foreground "$C_SURFACE" "  Nothing to revert."
+    fi
+}
+
+handle_sigint() {
+    trap '' INT  # block further Ctrl+C while dialog is open
+    echo ""
+    if gum confirm \
+        --affirmative "Yes, quit" \
+        --negative "No, continue" \
+        --default=No \
+        --prompt.foreground "$C_YELLOW" \
+        --selected.background "$C_RED" \
+        --selected.foreground "$C_BASE" \
+        --unselected.foreground "$C_TEXT" \
+        "  Abort setup and revert changes?"; then
+        echo ""
+        gum style --foreground "$C_YELLOW" --bold "  Reverting changes..."
+        wizard_cleanup
+        echo ""
+        gum style --foreground "$C_RED" --bold "  Setup aborted."
+        echo ""
+        exit 130
+    fi
+    trap 'handle_sigint' INT  # re-arm after "No, continue"
+}
+
 # ── Build ─────────────────────────────────────────────────────────────────
 build_project() {
     header "Building Project"
 
+    _WIZARD_PROJECT_CREATED=true
+
     local slug
     slug="$(slugify "$PROJECT_NAME")"
 
@@ -230,6 +276,7 @@ print_next_steps() {
 
 # ── Main ──────────────────────────────────────────────────────────────────
 main() {
+    trap 'handle_sigint' INT
     show_banner
     check_prerequisites
     setup_core
@@ -238,6 +285,7 @@ main() {
     confirm_summary
     build_project
     print_next_steps
+    trap - INT
 }
 
 main "$@"