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>

lib/prereqs.sh

@@ -98,8 +98,73 @@ _install_docker() {
     warn "Added $USER to docker group — log out and back in for it to take effect."
 }
 
+ensure_api_key() {
+    if [[ -n "${ANTHROPIC_API_KEY:-}" ]]; then
+        success "ANTHROPIC_API_KEY is set"
+        return
+    fi
+
+    # Resolve config dir — CLAUDE_CONFIG_DIR overrides default ~/.claude
+    local claude_dir="${CLAUDE_CONFIG_DIR:-$HOME/.claude}"
+
+    local creds_file=""
+    if   [[ -f "$claude_dir/.credentials.json" ]]; then creds_file="$claude_dir/.credentials.json"
+    elif [[ -f "$HOME/.claude.json"             ]]; then creds_file="$HOME/.claude.json"
+    elif [[ -f "$claude_dir/.claude.json"       ]]; then creds_file="$claude_dir/.claude.json"
+    elif [[ -f "$HOME/.anthropic/.credentials.json" ]]; then creds_file="$HOME/.anthropic/.credentials.json"
+    fi
+
+    if [[ -n "$creds_file" ]]; then
+        success "Anthropic credentials found ($creds_file)"
+        return
+    fi
+
+    warn "ANTHROPIC_API_KEY is not set."
+    echo ""
+    gum style --foreground "$C_SKY" --margin "0 4" \
+        "Claude Code needs an Anthropic API key to run inside the container." \
+        "Get one at: https://console.anthropic.com/settings/api-keys"
+    echo ""
+
+    local key
+    key=$(gum input \
+        --password \
+        --placeholder "sk-ant-..." \
+        --prompt "  › " \
+        --prompt.foreground "$C_MAUVE" \
+        --cursor.foreground "$C_MAUVE" \
+        --header "  Anthropic API key" \
+        --header.foreground "$C_SKY" \
+        --width 70) || true
+
+    if [[ -z "$key" ]]; then
+        warn "No API key entered — set ANTHROPIC_API_KEY before running ./start.sh"
+        return
+    fi
+
+    export ANTHROPIC_API_KEY="$key"
+    success "ANTHROPIC_API_KEY set for this session"
+
+    ask_yn _save "Save to shell profile (~/.zshrc / ~/.bashrc)?" "y"
+    if [[ "$_save" == "y" ]]; then
+        local profile
+        if [[ "$SHELL" == */zsh ]]; then
+            profile="$HOME/.zshrc"
+        else
+            profile="$HOME/.bashrc"
+        fi
+        if grep -q "ANTHROPIC_API_KEY" "$profile" 2>/dev/null; then
+            warn "ANTHROPIC_API_KEY already in $profile — not adding again."
+        else
+            printf '\nexport ANTHROPIC_API_KEY="%s"\n' "$key" >> "$profile"
+            success "Saved to $profile"
+        fi
+    fi
+}
+
 check_prerequisites() {
     header "Prerequisites"
     ensure_git
     ensure_container_runtime
+    ensure_api_key
 }