Add manufacturer catalog, category/manufacturer library management, and built-in cable flag

Normalizes manufacturer as a shared catalog entity (like device categories)
instead of free text on each device, giving the admin duplicate-detection
nudge a reliable signal. Adds full CRUD (including Admin direct-publish,
bypassing the submission queue) for categories, manufacturers, port types,
and cable types, plus a Categories & Manufacturers library modal and a
browse-by-manufacturer/search view in the device palette. Adds
Port.builtInCable so a captive/permanently-attached cable (a keyboard's USB
lead, a budget AVR's power cord) can be flagged and excluded from the BOM.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017DUU6CnxECCDeqDNYJgr5x

supabase/migrations/20260917000000_category_manufacturer_submissions.sql

@@ -0,0 +1,61 @@
+-- Rounds device_category and manufacturer out to full parity with the
+-- other catalog entity types: submission/review workflow (already halfway
+-- there — catalog_submissions.entity_type has allowed both since the
+-- initial schema, and the app-side plumbing for device_category already
+-- exists in the review queue and My Submissions), plus direct rename of
+-- your own private entry / an already-public one by an Admin.
+--
+-- No new tables or RLS policies — device_categories/manufacturers already
+-- have full is_public/owner_id CRUD policies from the initial schema
+-- (device_categories is explicitly the "representative case" the RLS test
+-- suite already covers for this shape), just never exercised by app code
+-- for anything beyond insert. This migration only extends the one function
+-- that didn't already know about manufacturers.
+
+create or replace function public.catalog_entity_usage_impact(p_entity_type text, p_entity_id text)
+returns table(diagram_count integer, sample jsonb)
+language plpgsql
+stable
+security definer
+set search_path = public
+as $$
+begin
+  if not public.is_admin() then
+    raise exception 'insufficient_privilege' using errcode = '42501';
+  end if;
+
+  return query
+    select count(*)::int, coalesce(jsonb_agg(jsonb_build_object('id', s.id, 'name', s.name, 'ownerUsername', s.owner_username) order by s.rn) filter (where s.rn <= 5), '[]'::jsonb)
+    from (
+      select d.id, d.name, p.username as owner_username,
+             row_number() over (order by d.updated_at desc) as rn
+      from public.diagrams d
+      join public.profiles p on p.id = d.owner_id
+      where case p_entity_type
+        when 'device_template' then exists (
+          select 1 from jsonb_array_elements(coalesce(d.data -> 'devices', '[]'::jsonb)) dev
+          where dev ->> 'templateId' = p_entity_id
+        )
+        when 'device_category' then exists (
+          select 1 from jsonb_array_elements(coalesce(d.data -> 'devices', '[]'::jsonb)) dev
+          where dev ->> 'category' = p_entity_id
+        )
+        when 'manufacturer' then exists (
+          select 1 from jsonb_array_elements(coalesce(d.data -> 'devices', '[]'::jsonb)) dev
+          where dev ->> 'manufacturerId' = p_entity_id
+        )
+        when 'port_type' then exists (
+          select 1
+          from jsonb_array_elements(coalesce(d.data -> 'devices', '[]'::jsonb)) dev,
+               jsonb_array_elements(coalesce(dev -> 'ports', '[]'::jsonb)) port
+          where port ->> 'portTypeId' = p_entity_id
+        )
+        when 'cable_type' then exists (
+          select 1 from jsonb_array_elements(coalesce(d.data -> 'connections', '[]'::jsonb)) conn
+          where conn ->> 'cableTypeId' = p_entity_id
+        )
+        else false
+      end
+    ) s;
+end;
+$$;