refactor(hachidori): drop the Docker management upload for character dictionaries

Every supported host now takes dictionary ZIPs over the link, so remove
the port 8780 upload, its hachidori.externalHostManagementUrl override and
the hachidori config section. A linked host without linked-import-v1 now
reports the update or manual-import fix.

changes/hachidori-backend.md

@@ -3,7 +3,7 @@ area: dictionary
 
 - Added a bundled Hachidori dictionary backend alongside the default Yomitan backend. Select it with `dictionaryBackend` and restart SubMiner.
 - The tray and dictionary-settings shortcut follow the selected backend. `--hachidori` opens Hachidori settings, while `--yomitan` opens Yomitan settings unless a read-only external Yomitan profile is configured. This restriction also applies with Hachidori active, without blocking Hachidori settings.
-- Hachidori integrates with subtitle scanning, popup controls, lookup tracking, character dictionaries, and Anki media enrichment, with separate dictionaries and settings for each backend. Character dictionaries reach a linked host over the link (Hachidori 0.2.3 or later) and Docker hosts through their management port, with `hachidori.externalHostManagementUrl` as an optional override. Both retry busy imports and replace the previous dictionary only after a successful import. Older hosts report where to import the dictionary manually.
+- Hachidori integrates with subtitle scanning, popup controls, lookup tracking, character dictionaries, and Anki media enrichment, with separate dictionaries and settings for each backend. Character dictionaries reach a linked host over the link (Hachidori 0.2.3 or later, or a current Docker host), retry busy imports, and replace the previous dictionary only after a successful import. Older hosts report where to import the dictionary manually.
 - Hachidori auto-populates its first Anki template from SubMiner's deck, tags, and field mappings, detects an unambiguous matching note type, and preserves existing custom templates apart from the deck, which follows `ankiConnect.deck` so polling mode enriches Hachidori cards. Anki discovery retries after an unavailable connection.
 - Hachidori saves downloadable word audio before sending a note through SubMiner's Anki proxy, so freshly mined animated cards include the word-audio delay.
 - Both bundled dictionary backends reload their background code on startup so extension updates take effect while preserving installed dictionaries and settings. Failed Yomitan connection-setting updates can be retried without manually resetting the managed Anki endpoint.