Add age filters to rules

README.md

@@ -17,7 +17,7 @@ message meets a specified criterion.
 - **Markdown conversion** – optionally convert HTML bodies to Markdown before sending them to the AI service.
 - **Debug logging** – optional colorized logs help troubleshoot interactions with the AI service.
 - **Light/Dark themes** – automatically match Thunderbird's appearance with optional manual override.
-- **Automatic rules** – create rules that tag, move, copy, forward, reply, delete, archive, mark read/unread or flag/unflag messages based on AI classification. Rules can optionally apply only to unread messages.
+- **Automatic rules** – create rules that tag, move, copy, forward, reply, delete, archive, mark read/unread or flag/unflag messages based on AI classification. Rules can optionally apply only to unread messages and can ignore messages outside a chosen age range.
 - **Rule ordering** – drag rules to prioritize them and optionally stop processing after a match.
 - **Context menu** – apply AI rules from the message list or the message display action button.
 - **Status icons** – toolbar icons show when classification is in progress and briefly display success or error states.
@@ -72,7 +72,8 @@ Sortana is implemented entirely with standard WebExtension scripts—no custom e
 2. Use the **Classification Rules** section to add a criterion and optional
    actions such as tagging, moving, copying, forwarding, replying,
    deleting or archiving a message when it matches. Drag rules to
-   reorder them, check *Only apply to unread messages* to skip read mail, and
+   reorder them, check *Only apply to unread messages* to skip read mail,
+   set optional minimum or maximum message age limits, and
    check *Stop after match* to halt further processing. Forward and reply actions
    open a compose window using the account that received the message.
 3. Save your settings. New mail will be evaluated automatically using the