feat(sidecars): add proxied sidecar tabs (#279)

## Summary
- add SideCar support across the server and UI, including proxied tabs,
picker/settings flows, and websocket-aware proxying
- unify top-level tab handling so workspace instances and SideCars share
the same tab model and navigation flows
- limit SideCars to port-based services only, removing server-managed
process control from the final API and UI

---------

Co-authored-by: Shantur <shantur@Mac.home>
Co-authored-by: Shantur <shantur@Shanturs-MacBook-Pro-M5.local>

packages/ui/src/lib/i18n/messages/fr/commands.ts

@@ -15,17 +15,17 @@ export const commandMessages = {
   "commands.newInstance.description": "Ouvrir le sélecteur de dossiers pour créer une nouvelle instance",
   "commands.newInstance.keywords": "dossier, projet, espace de travail",
 
-  "commands.closeInstance.label": "Fermer l'instance",
-  "commands.closeInstance.description": "Arrêter le serveur de l'instance actuelle",
-  "commands.closeInstance.keywords": "arrêter, quitter, fermer",
+  "commands.closeInstance.label": "Fermer l'onglet",
+  "commands.closeInstance.description": "Fermer l'onglet de premier niveau actuel",
+  "commands.closeInstance.keywords": "arrêter, quitter, fermer, onglet",
 
-  "commands.nextInstance.label": "Instance suivante",
-  "commands.nextInstance.description": "Passer à l'onglet d'instance suivant",
-  "commands.nextInstance.keywords": "changer, naviguer, suivant",
+  "commands.nextInstance.label": "Onglet suivant",
+  "commands.nextInstance.description": "Passer à l'onglet de premier niveau suivant",
+  "commands.nextInstance.keywords": "changer, naviguer, suivant, onglet",
 
-  "commands.previousInstance.label": "Instance précédente",
-  "commands.previousInstance.description": "Passer à l'onglet d'instance précédent",
-  "commands.previousInstance.keywords": "changer, naviguer, précédent",
+  "commands.previousInstance.label": "Onglet précédent",
+  "commands.previousInstance.description": "Passer à l'onglet de premier niveau précédent",
+  "commands.previousInstance.keywords": "changer, naviguer, précédent, onglet",
 
   "commands.newSession.label": "Nouvelle session",
   "commands.newSession.description": "Créer une nouvelle session parente",

packages/ui/src/lib/i18n/messages/fr/folderSelection.ts

@@ -5,7 +5,7 @@ export const folderSelectionMessages = {
   "folderSelection.tagline": "Sélectionnez un dossier pour commencer à coder avec l'IA",
 
   "folderSelection.links.github": "GitHub de CodeNomad",
-  "folderSelection.links.githubStars": "Stars GitHub de CodeNomad",
+  "folderSelection.links.githubStars": "Étoiles GitHub de CodeNomad",
   "folderSelection.links.discord": "Discord de CodeNomad",
 
   "folderSelection.empty.title": "Aucun dossier récent",
@@ -16,13 +16,13 @@ export const folderSelectionMessages = {
   "folderSelection.recent.subtitle.other": "{count} dossiers disponibles",
   "folderSelection.recent.remove": "Retirer des récents",
 
-  "folderSelection.browse.title": "Parcourir les dossiers",
+  "folderSelection.browse.title": "Parcourir un dossier",
   "folderSelection.browse.subtitle": "Sélectionnez n'importe quel dossier sur votre ordinateur",
   "folderSelection.browse.button": "Parcourir les dossiers",
   "folderSelection.browse.buttonOpening": "Ouverture...",
-  "folderSelection.actions.title": "Ouvrir un dossier ou connecter un serveur",
+  "folderSelection.actions.title": "Ouvrir un dossier ou se connecter à un serveur",
   "folderSelection.actions.subtitle": "Ouvrez un dossier local ou connectez-vous à un serveur CodeNomad",
-  "folderSelection.actions.connectButton": "Connecter un serveur CodeNomad",
+  "folderSelection.actions.connectButton": "Se connecter au serveur CodeNomad",
 
   "folderSelection.advancedSettings": "Paramètres avancés",
   "folderSelection.opencode": "OpenCode",
@@ -69,4 +69,5 @@ export const folderSelectionMessages = {
   "folderSelection.servers.dialog.connecting": "Connexion...",
   "folderSelection.servers.dialog.errorRequired": "Le nom du serveur et l'URL sont requis.",
   "folderSelection.servers.dialog.errorConnect": "Impossible de se connecter au serveur distant.",
+  "folderSelection.sidecars.button": "Open SideCar",
 } as const

packages/ui/src/lib/i18n/messages/fr/settings.ts

@@ -194,4 +194,40 @@ export const settingsMessages = {
   "settings.speech.save.saved": "Enregistré",
   "settings.speech.save.unsaved": "Modifications non enregistrées",
   "settings.speech.save.error": "Échec de l'enregistrement",
+  "settings.nav.sidecars": "SideCars",
+  "settings.section.sidecars.eyebrow": "Server services",
+  "settings.section.sidecars.title": "SideCars",
+  "settings.section.sidecars.subtitle": "Configure local services listening on fixed ports that the server can proxy into tabs.",
+  "sidecars.form.name": "Name",
+  "sidecars.form.validation": "Enter a valid SideCar name and port.",
+  "sidecars.form.port": "Port",
+  "sidecars.form.insecure": "Use HTTP",
+  "sidecars.form.protocol": "Protocol",
+  "sidecars.form.protocol.help": "Choose how the proxy should connect to the local service.",
+  "sidecars.form.protocol.https": "HTTPS",
+  "sidecars.form.protocol.http": "HTTP",
+  "sidecars.form.prefixMode": "Prefix mode",
+  "sidecars.form.prefixMode.help": "Choose whether the SideCar receives the public /sidecars path prefix.",
+  "sidecars.form.prefixMode.strip": "Strip prefix",
+  "sidecars.form.prefixMode.preserve": "Preserve prefix",
+  "sidecars.form.add": "Add SideCar",
+  "sidecars.kind.port": "Port",
+  "sidecars.status.running": "Running",
+  "sidecars.status.stopped": "Stopped",
+  "sidecars.basePath": "Base path",
+  "sidecars.settings.listTitle": "Configured SideCars",
+  "sidecars.settings.listSubtitle": "Review the port-based SideCars available in the picker.",
+  "sidecars.settings.empty": "No SideCars configured yet.",
+  "sidecars.picker.title": "Open SideCar",
+  "sidecars.picker.loading": "Loading SideCars...",
+  "sidecars.picker.subtitle": "Choose an available SideCar to open in a new tab.",
+  "sidecars.picker.empty": "No port-based SideCars are available yet.",
+  "sidecars.picker.close": "Close",
+  "sidecars.open.errorTitle": "Unable to open SideCar",
+  "sidecars.open.notFound": "SideCar not found.",
+  "sidecars.open.notRunning": "SideCar is not reachable on its configured port.",
+  "sidecars.back": "Back",
+  "sidecars.refresh": "Refresh",
+  "sidecars.path": "Path",
+  "sidecars.go": "Go",
 } as const