docs: surface custom Mail profile task

src/govoplan_mail/backend/manifest.py

@@ -279,6 +279,7 @@ manifest = ModuleManifest(
                 "kind": "workflow",
                 "route": "/settings?section=mail-profiles",
                 "screen": "Mail profiles",
+                "help_contexts": ["mail.profiles", "app.settings"],
                 "prerequisites": [
                     "Mail is installed and you may read, use, and test profiles visible in the current context.",
                     "A profile administrator has configured credentials and effective policy.",
@@ -321,6 +322,7 @@ manifest = ModuleManifest(
                 "kind": "workflow",
                 "route": "/mail",
                 "screen": "Mail",
+                "help_contexts": ["mail.list"],
                 "prerequisites": [
                     "An active visible profile has IMAP configured.",
                     "You may both use that profile and read its mailbox.",