oauth: add asana provider (#11814)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

backend/oauth_connect.json

@@ -317,6 +317,14 @@
       "type": "web_server"
     }
   },
+  "asana": {
+    "auth_url": "https://app.asana.com/-/oauth_authorize",
+    "token_url": "https://app.asana.com/-/oauth_token",
+    "scopes": ["default"],
+    "scope_options": [
+      { "value": "default", "label": "Full permissions (the Asana app must be registered with Full permissions)" }
+    ]
+  },
   "notion": {
     "auth_url": "https://api.notion.com/v1/oauth/authorize",
     "token_url": "https://api.notion.com/v1/oauth/token",

frontend/src/lib/components/AuthSettings.svelte

@@ -98,7 +98,8 @@
 		'salesforce',
 		'outreach',
 		'notion',
-		'hubspot'
+		'hubspot',
+		'asana'
 	]
 	// Providers whose registry entry (`backend/oauth_connect.json`) carries a
 	// `sandbox` URL block. Each one gets a sibling `<name>_sandbox` dropdown