chore(orbit): launch popover with create / join / help entries

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/locales/en.ts

@@ -1452,7 +1452,21 @@ export const enTranslation = {
   },
   orbit: {
     triggerLabel: 'Psy Orbit',
-    triggerTooltip: 'Start a shared listening session',
+    triggerTooltip: 'Start or join a shared listening session',
+    launchCreate: 'Create a session',
+    launchJoin: 'Join a session',
+    launchHelp: 'How does this work?',
+    launchHelpSoon: 'Coming soon',
+    joinModalTitle: 'Join an Orbit session',
+    joinModalSub: 'Paste the invite link your host sent you.',
+    joinModalLinkLabel: 'Invite link',
+    joinModalLinkPlaceholder: 'psysonic2://orbit/…',
+    joinModalLinkHelper: 'Works with any valid Orbit link. Must point to the server you\'re currently signed into.',
+    joinModalPasteTooltip: 'Paste from clipboard',
+    joinModalSubmit: 'Join',
+    joinModalBusy: 'Joining…',
+    joinErrEmpty: 'Please paste an invite link.',
+    joinErrInvalid: 'That doesn\'t look like an Orbit invite link.',
     closeAria: 'Close',
     heroTitlePrefix: 'Listen together with',
     heroTitleBrand: 'Psy Orbit',