feat(spa): logs sort + page-size persistence, trash see-all paging (#213)

Blazor parity for the remaining #213 conveniences:

- GET /api/logs gains sortField (timestamp|level) and sortDirection
  (asc|desc) query params, allow-listed and normalized (unrecognized
  values fall back to the pre-existing timestamp-desc default) rather
  than rejected with a 422. LogsScreen.tsx renders clickable, sortable
  column headers with a chevron direction indicator.
- LogsScreen.tsx now persists the chosen page size to localStorage
  (ctv-logs-page-size) and restores it on mount, following the
  existing designSystem.ts localStorage-preference pattern. This is a
  client-local UI preference, not the Blazor ConfigElement-backed
  server setting — see docs/decisions.md.
- TrashScreen.tsx adds a per-kind "See all N ..." affordance that
  pages past the 100/kind /api/search cap using the already-paginated
  GET /api/library/browse (mediaType + pageNum), appending results
  client-side. No new API surface was needed since that endpoint
  already supports the paging the trash screen needed.

docs/decisions.md, docs/blazor-route-parity.md, docs/spa-conventions.md
and docs/api-conventions.md updated in this same commit. OpenAPI spec
regenerated (v1.d.ts unchanged: query params aren't part of the
generated components/schemas surface).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ErsatzTV/wwwroot/openapi/v1.json

@@ -5410,6 +5410,7 @@
           "Logs"
         ],
         "summary": "Get recent log entries",
+        "description": "sortField is validated against an allow-list (timestamp, level); an unrecognized value falls back to timestamp. sortDirection accepts asc/desc and falls back to desc (the pre-existing default, newest first).",
         "operationId": "GetLogs",
         "parameters": [
           {
@@ -5437,6 +5438,22 @@
               "type": "string",
               "default": ""
             }
+          },
+          {
+            "name": "sortField",
+            "in": "query",
+            "schema": {
+              "type": "string",
+              "default": "timestamp"
+            }
+          },
+          {
+            "name": "sortDirection",
+            "in": "query",
+            "schema": {
+              "type": "string",
+              "default": "desc"
+            }
           }
         ],
         "responses": {