Settings: a section per plugin, and call the folder Spam

Plugin settings pages were stacked at the bottom of Settings -> Accounts, which
put antispam's thresholds and lists under a heading about mail accounts. Each
`settings.page` now gets its own entry in the Settings nav: "Antispam filtering"
and "Mail filters".

Slot gains an optional `title` for this — the host needs a label when it gives a
slot an area of its own, and falls back to the plugin name. PluginSlot gains an
optional `plugin` filter so a host can render one plugin's bundle rather than
every binding for a slot name.

Wording: the app calls that folder Spam (i18n `nav.spam`), so the plugin's copy
now does too — "filed into Spam", "Move to Spam", "marked as spam". The IMAP
special-use stays `junk`, which is what the protocol calls it; only what the
user reads changed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018SqJYt7jD7oUEkoY68sBZo

backend/app/plugins/loader.py

@@ -96,7 +96,10 @@ def mount_routers(app: FastAPI) -> None:
 
 
 def _slot_dict(slot: Slot) -> dict[str, str]:
-    return {"name": slot.name, "bundle": slot.bundle}
+    d = {"name": slot.name, "bundle": slot.bundle}
+    if slot.title:
+        d["title"] = slot.title
+    return d
 
 
 def _page_dict(page: Page) -> dict[str, Any]:
@@ -120,9 +123,7 @@ def _manifest_dict(plugin: Plugin, manifest: UiManifest) -> dict[str, Any]:
 
 def build_ui_manifest() -> dict[str, Any]:
     """Aggregate every plugin's UI manifest for the frontend loader (SPEC §11.3)."""
-    plugins = [
-        _manifest_dict(p, p.ui_manifest) for p in get_plugins() if p.ui_manifest is not None
-    ]
+    plugins = [_manifest_dict(p, p.ui_manifest) for p in get_plugins() if p.ui_manifest is not None]
     return {"plugins": plugins}
 
 

backend/app/plugins/types.py

@@ -38,6 +38,10 @@ class Slot:
 
     name: str
     bundle: str  # path served by the plugin router, resolved by the frontend loader
+    # Human label for slots the host renders as a named area of its own — today
+    # `settings.page`, which becomes a section in Settings rather than being
+    # stacked under someone else's. Falls back to the plugin's name.
+    title: str | None = None
 
     def __post_init__(self) -> None:
         if self.name not in SLOT_NAMES: