feat(deploy): stream live build logs in build progress modal

Show real-time kaniko/init-container build output inside the build
progress modal during the building/deploying phases, alongside the
existing percentage. The build-logs endpoint now returns live pod logs
while a build is in progress (falling back to the persisted log once
finished), and the modal polls it every 2s with auto-scroll. Minimize
behaviour is unchanged.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/i18n/dictionaries/en.ts

@@ -170,6 +170,9 @@ const en: Dictionary = {
     deploymentCancelled: 'Deployment cancelled',
     cancelDeploymentFailed: 'Failed to cancel deployment',
     minimizeHint: 'Use minimize to keep working while deployment continues. Close (×) cancels the deployment.',
+    buildLogTitle: 'Build log',
+    buildLogWaiting: 'Starting build…',
+    buildLogLive: 'live',
     continueInBackground: 'Continue in background',
     minimizeAria: 'Minimize and continue in background',
     cancelDeploymentAria: 'Cancel deployment',