feat: add session score display and refactor Jenkinsfile

Score tracks X wins, O wins, draws in-memory for current session.
Jenkinsfile rewritten as scripted pipeline with named execute functions
and per-branch strategy closures (mirrors BasePipeline pattern).

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

Jenkinsfile

@@ -2,51 +2,68 @@
 
 import vn.fireflylab.pipeline.BranchStrategy
 
-pipeline {
-    agent {
-        kubernetes {
-            yaml homelabK8sAgent(withTools: true)
+// ── Stage functions ────────────────────────────────────────────────
+def executeInstallTest() {
+    stage('Install & Test') {
+        container('node') { runNodeTest() }
+    }
+}
+
+def executeBuildPush() {
+    stage('Build & Push') {
+        container('docker') {
+            def tag = BranchStrategy.imageTag(env.BRANCH_NAME)
+            env.IMAGE_TAG = tag
+            dockerBuildPush(appName: 'tictactoe', tag: tag)
         }
     }
+}
 
-    environment {
-        DOCKER_HOST = 'tcp://localhost:2375'
+def executeBumpChart() {
+    stage('Bump Helm Chart') {
+        container('tools') {
+            bumpHelmChart(imageTag: env.IMAGE_TAG)
+            gitCommitPush(
+                files: ['manifest/helm/Chart.yaml', 'manifest/helm/values.yaml'],
+                message: "ci: bump tictactoe chart to ${env.IMAGE_TAG}"
+            )
+        }
     }
+}
 
-    stages {
-        stage('Install & Test') {
-            steps {
-                container('node') {
-                    runNodeTest()
-                }
+// ── Pipeline ───────────────────────────────────────────────────────
+podTemplate(yaml: homelabK8sAgent(withTools: true)) {
+    node(POD_LABEL) {
+        withEnv(['DOCKER_HOST=tcp://localhost:2375']) {
+            checkout scm
+
+            BranchStrategy.prStrategy(env.BRANCH_NAME) {
+                executeInstallTest()
             }
-        }
 
-        stage('Build & Push Image') {
-            when { expression { BranchStrategy.shouldBuildImage(env.BRANCH_NAME) } }
-            steps {
-                container('docker') {
-                    script {
-                        def tag = BranchStrategy.imageTag(env.BRANCH_NAME)
-                        env.IMAGE_TAG = tag
-                        dockerBuildPush(appName: 'tictactoe', tag: tag)
-                    }
-                }
+            BranchStrategy.featureStrategy(env.BRANCH_NAME) {
+                executeInstallTest()
+                executeBuildPush()
             }
-        }
 
-        stage('Bump Helm Chart') {
-            when { expression { BranchStrategy.shouldBumpChart(env.BRANCH_NAME) } }
-            steps {
-                container('tools') {
-                    script {
-                        bumpHelmChart(imageTag: env.IMAGE_TAG)
-                        gitCommitPush(
-                            files: ['manifest/helm/Chart.yaml', 'manifest/helm/values.yaml'],
-                            message: "ci: bump tictactoe chart to ${env.IMAGE_TAG}"
-                        )
-                    }
-                }
+            BranchStrategy.developStrategy(env.BRANCH_NAME) {
+                executeInstallTest()
+                executeBuildPush()
+            }
+
+            BranchStrategy.mainStrategy(env.BRANCH_NAME) {
+                executeInstallTest()
+                executeBuildPush()
+            }
+
+            BranchStrategy.releaseStrategy(env.BRANCH_NAME) {
+                executeInstallTest()
+                executeBuildPush()
+            }
+
+            BranchStrategy.hotfixStrategy(env.BRANCH_NAME) {
+                executeInstallTest()
+                executeBuildPush()
             }
         }
     }