Add id to filter forms for LiveView form recovery

[diogomrts]

Problem

The filter control forms in Cinder.FilterManager use phx-change/phx-submit but have no id attribute. LiveView requires form ids to perform form recovery following crashes or disconnects.

Apps that enable the strict LiveView test check:

config :phoenix_live_view, :test_warnings, missing_form_id: :raise

get a runtime error for every Cinder table that renders filters:

Detected a form with phx-change but missing id

Fix

Add an id derived from the existing @table_id assign to both filter forms (the slot-based and default render paths):

• #{@table_id}-filters for the controls-slot form
• #{@table_id}-filter-form for the default form

Notes

@table_id is already passed into these render functions and used for child element ids (e.g. #{@table_id}-filter-body), so the new ids are unique per table.

[sevenseacat]

Nice one, thank you so much for this!