refactor(push): remove legacy push_global_token setting

- Clean up redundant push_global_token INSERT and DELETE statements from 202606140004 migration.
- Add DELETE for push_global_token in 202606160001 migration to wipe out legacy settings on update.
- Adjust expected w_system_configs count in migrator_test.go to 30.

internal/db/migrator/goose/postgres/202606140004_create_push_channels.sql

@@ -15,17 +15,5 @@ CREATE TABLE w_push_channels (
 CREATE INDEX idx_w_push_channels_name ON w_push_channels(name);
 CREATE INDEX idx_w_push_channels_enabled ON w_push_channels(enabled);
 
-INSERT INTO w_system_configs (key, value, type, visibility, description, created_at, updated_at)
-VALUES (
-    'push_global_token',
-    '',
-    'system',
-    0,
-    '系统全局推送鉴权令牌',
-    CURRENT_TIMESTAMP,
-    CURRENT_TIMESTAMP
-) ON CONFLICT (key) DO NOTHING;
-
 -- +goose Down
-DELETE FROM w_system_configs WHERE key = 'push_global_token';
 DROP TABLE IF EXISTS w_push_channels;

internal/db/migrator/goose/postgres/202606160001_remove_push_config.sql

@@ -1,5 +1,6 @@
 -- +goose Up
 DELETE FROM w_system_configs WHERE key = 'push_config';
 DELETE FROM w_push_events WHERE event_key = 'admin_login';
+DELETE FROM w_system_configs WHERE key = 'push_global_token';
 
 -- +goose Down

internal/db/migrator/goose/sqlite/202606140004_create_push_channels.sql

@@ -15,17 +15,5 @@ CREATE TABLE w_push_channels (
 CREATE INDEX idx_w_push_channels_name ON w_push_channels(name);
 CREATE INDEX idx_w_push_channels_enabled ON w_push_channels(enabled);
 
-INSERT OR IGNORE INTO w_system_configs (key, value, type, visibility, description, created_at, updated_at)
-VALUES (
-    'push_global_token',
-    '',
-    'system',
-    0,
-    '系统全局推送鉴权令牌',
-    CURRENT_TIMESTAMP,
-    CURRENT_TIMESTAMP
-);
-
 -- +goose Down
-DELETE FROM w_system_configs WHERE key = 'push_global_token';
 DROP TABLE IF EXISTS w_push_channels;

internal/db/migrator/goose/sqlite/202606160001_remove_push_config.sql

@@ -1,5 +1,6 @@
 -- +goose Up
 DELETE FROM w_system_configs WHERE key = 'push_config';
 DELETE FROM w_push_events WHERE event_key = 'admin_login';
+DELETE FROM w_system_configs WHERE key = 'push_global_token';
 
 -- +goose Down

internal/db/migrator/migrator_test.go

@@ -17,7 +17,7 @@ import (
 	"gorm.io/gorm"
 )
 
-const expectedMigratedSystemConfigCount = 31
+const expectedMigratedSystemConfigCount = 30
 
 func TestMigrateInitializesSQLiteDatabase(t *testing.T) {
 	sqliteDB, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{