feat: Integrations splits into Library, Acquisition, Metadata sources and Email & network, each a page on the admin rail; the Overview keeps only what needs you (M503 #5607)

- Library: the folders, Run scan and a row per scan job, cover art, fingerprints and loudness (off the Overview and Duplicates)
- Acquisition: indexers and clients, searching, re-acquisition (off Missing files), Lidarr
- Metadata sources: AcoustID, and one provider block for cover art and tags in place of the pasted pair
- Email & network: outgoing email, the notification schedule, public address, proxies
- Lidarr, outgoing email and the provider block are rebuilt as SettingsGroup rows; failures read as sentences, not codes
- Duplicates and Missing files say what their setting is and link to where it is set

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

android/app/src/main/java/com/fabledsword/minstrel/api/ErrorCopy.kt

@@ -106,12 +106,12 @@ object ErrorCopy {
             "This server is on the internet, so its URL must start with https://. " +
             "Plain http:// only works on your home network.",
         "lidarr_unreachable" to
-            "Lidarr is unreachable right now. Try again, or check Admin → Integrations.",
+            "Lidarr is unreachable right now. Try again, or check Admin › Acquisition.",
         "lidarr_disabled" to "Lidarr integration is not enabled.",
         "lidarr_auth_failed" to "Lidarr authentication failed.",
         "lidarr_defaults_incomplete" to
             "Lidarr is missing a default quality profile or root folder. " +
-            "Set them in Admin → Integrations.",
+            "Set them in Admin › Acquisition.",
         "lidarr_server_error" to "Lidarr returned an error. Check Lidarr's logs for the cause.",
         "lidarr_rejected" to
             "Lidarr rejected the request. Check the server logs for the field-level reason.",