fix: stabilize post-MVP travel-agent and itinerary workflows

frontend/src/locales/en.json

@@ -735,7 +735,27 @@
 		"use_imperial": "Use Imperial Units",
 		"use_imperial_desc": "Use imperial units (feet, inches, pounds) instead of metric units",
 		"trails": "Trails",
-		"activities": "Activities"
+		"activities": "Activities",
+		"ai_api_keys": "AI API Keys",
+		"ai_api_keys_desc": "Manage write-only API keys for travel-agent recommendations.",
+		"saved_api_keys": "Saved API Keys",
+		"no_api_keys_saved": "No API keys saved yet.",
+		"add_api_key": "Add API Key",
+		"provider": "Provider",
+		"api_key_value": "API Key",
+		"api_key_value_placeholder": "Enter your API key",
+		"api_key_write_only_hint": "For security, your plaintext key is write-only and is never shown after saving.",
+		"save_api_key": "Save API Key",
+		"api_keys_saved": "API key saved.",
+		"api_keys_deleted": "API key deleted.",
+		"api_keys_generic_error": "Unable to update API keys right now.",
+		"api_keys_value_required": "Please enter an API key.",
+		"api_keys_config_unavailable": "API key storage is unavailable",
+		"api_keys_config_guidance": "Ask your server administrator to configure FIELD_ENCRYPTION_KEY and try again.",
+		"travel_agent_help_title": "How to use the travel agent",
+		"travel_agent_help_body": "Open a collection and switch to Recommendations to interact with the travel agent for place suggestions.",
+		"travel_agent_help_open_collections": "Open Collections",
+		"travel_agent_help_setup_guide": "Travel agent setup guide"
 	},
 	"collection": {
 		"collection_created": "Collection created successfully!",