fix: get_categories always includes custom categories (v0.4.12)

Custom categories (rights.canDelete=true) have no locale field set by
the API and were silently excluded by the locale filter. They now bypass
both the locale and taskListType filters so they always appear in
get_categories output regardless of the locale parameter.

Also: deleted 7 test categories (TEmojiApple, Obst & Gemüse (old),
TestKategorie, ProbeKat2, [TEST]emoji=apple, ProbeKat1, TDelMeta)
and restored 'Obst & Gemüse' (emoji 🍎) as a clean custom category.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -2,7 +2,7 @@
 
 MCP server for [Family Wall](https://www.familywall.com) -- read and manage your family's circles, lists, and tasks directly from Claude.
 
-## Features (v0.4.11)
+## Features (v0.4.12)
 
 ### Read
 
@@ -10,7 +10,7 @@ MCP server for [Family Wall](https://www.familywall.com) -- read and manage your
 - `get_members` -- list members of a circle (or all circles)
 - `get_lists` -- list all task lists (optionally filtered by circle)
 - `get_tasks` -- list tasks in a specific list (includes `category_id` field)
-- `get_categories` -- list categories for a list (locale-filtered; `custom` flag marks user-created ones)
+- `get_categories` -- list categories for a list (locale-filtered; custom categories always included; `custom` flag marks user-created ones)
 - `get_activities` -- list recent wall activities (author resolved to display name)
 
 ### Write (with confirmation prompt)