feat(e2e): enhance end-to-end testing setup with new scripts and capture cases

- Updated package.json to include new E2E scripts for execution and snapshot capturing.
- Added new capture cases for the "new-project-modal" and "start-new-chat" functionalities in the E2E tests.
- Increased wait times in session detail captures to ensure elements are fully loaded before interactions.
- Introduced new shell scripts for starting the server and capturing snapshots, improving the E2E testing workflow.
- Updated NewChatModal and SessionsTab components to include data-testid attributes for better test targeting.

scripts/e2e/capture_snapshots.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+export GLOBAL_CLAUDE_DIR=$(git rev-parse --show-toplevel)/mock-global-claude-dir
+
+pnpx tsx ./e2e/captureSnapshot/index.ts

scripts/e2e/exec_e2e.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+kill_process_group() {
+  local pid=$1
+  local sig=${2:-TERM}
+  
+  local children=$(pgrep -P $pid 2>/dev/null || true)
+  for child in $children; do
+    kill_process_group $child $sig
+  done
+  
+  kill -$sig $pid 2>/dev/null || true
+}
+
+# cleanup関数を定義してtrapで確実に実行
+cleanup() {
+  if [ -n "${SERVER_PID:-}" ]; then
+    echo "Killing server (PID: $SERVER_PID) and its process tree..."
+    kill_process_group $SERVER_PID KILL
+  fi
+}
+
+trap cleanup EXIT INT TERM
+
+./scripts/e2e/start_server.sh & SERVER_PID=$!
+echo "Server started. pid=$SERVER_PID"
+
+sleep 5 # 即時起動するが、一応少し待っておく
+
+./scripts/e2e/capture_snapshots.sh
+echo "Completed capturing screenshots. Killing server..."

scripts/e2e/start_server.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+export PORT=4000
+export GLOBAL_CLAUDE_DIR=$(git rev-parse --show-toplevel)/mock-global-claude-dir
+
+echo "Check directory structure in $GLOBAL_CLAUDE_DIR:"
+ls -l $GLOBAL_CLAUDE_DIR
+
+node ./dist/index.js