refactor: unify code formatting and improve push/search implementations

- Remove BOM from all Go source files
- Standardize import ordering and whitespace across handlers and services
- Replace PostgreSQL full-text search with ILIKE pattern matching in post and user repositories
- Enhance JPush client with TLS transport, rate limit monitoring, and simplified API
- Refactor PushService to include userID in device management methods
- Add MaxDevicesPerUser limit and extract helper functions for push payload construction

internal/service/hot_rank_worker.go

@@ -1,4 +1,4 @@
-package service
+package service
 
 import (
 	"cmp"
@@ -24,24 +24,24 @@ type hotRankScored struct {
 
 // HotRankWorker 定时在候选池上重算热门分，写入 Redis ZSET（仅 TopN）及 top_ids（Redis+本地缓存）
 type HotRankWorker struct {
-	cfg        *config.Config
-	postRepo   repository.PostRepository
+	cfg         *config.Config
+	postRepo    repository.PostRepository
 	channelRepo repository.ChannelRepository
-	c          cache.Cache
-	mu         sync.Mutex
-	stopOnce   sync.Once
-	stopCh     chan struct{}
-	doneCh     chan struct{}
+	c           cache.Cache
+	mu          sync.Mutex
+	stopOnce    sync.Once
+	stopCh      chan struct{}
+	doneCh      chan struct{}
 }
 
 func NewHotRankWorker(cfg *config.Config, postRepo repository.PostRepository, channelRepo repository.ChannelRepository, c cache.Cache) *HotRankWorker {
 	return &HotRankWorker{
-		cfg:        cfg,
-		postRepo:   postRepo,
+		cfg:         cfg,
+		postRepo:    postRepo,
 		channelRepo: channelRepo,
-		c:          c,
-		stopCh:     make(chan struct{}),
-		doneCh:     make(chan struct{}),
+		c:           c,
+		stopCh:      make(chan struct{}),
+		doneCh:      make(chan struct{}),
 	}
 }