refactor: upgrade to Go 1.26 and modernize code idioms

- Replace `interface{}` with `any` type alias across all packages
- Use built-in `min()`/`max()` for parameter clamping
- Use `slices.SortFunc`, `slices.Min`, `slices.Max` for cleaner code
- Use `strings.Cut()` for simpler string parsing in auth middleware
- Use `errors.Is()` for proper error comparison in handlers
- Update dependencies: golang.org/x/image 0.37.0 -> 0.38.0
- Add Wire code generation guidelines to ARCHITECTURE.md
- Disable Go cache in CI build workflow

internal/service/hot_rank_worker.go

@@ -1,10 +1,11 @@
 package service
 
 import (
+	"cmp"
 	"context"
 	"errors"
 	"math"
-	"sort"
+	"slices"
 	"sync"
 	"time"
 
@@ -103,9 +104,7 @@ func (w *HotRankWorker) Refresh(ctx context.Context) error {
 	if topN <= 0 {
 		topN = 100
 	}
-	if topN > 500 {
-		topN = 500
-	}
+	topN = min(topN, 500)
 	recentHours := w.cfg.HotRank.RecentWindowHours
 	if recentHours <= 0 {
 		recentHours = 168
@@ -176,15 +175,8 @@ func (w *HotRankWorker) Refresh(ctx context.Context) error {
 			raw[i] = base / denom
 		}
 
-		minR, maxR := raw[0], raw[0]
-		for _, v := range raw[1:] {
-			if v < minR {
-				minR = v
-			}
-			if v > maxR {
-				maxR = v
-			}
-		}
+		minR := slices.Min(raw)
+		maxR := slices.Max(raw)
 
 		ranked = make([]scored, len(snapshots))
 		for i := range snapshots {
@@ -196,11 +188,16 @@ func (w *HotRankWorker) Refresh(ctx context.Context) error {
 			}
 			ranked[i] = scored{idx: i, norm: norm}
 		}
-		sort.Slice(ranked, func(a, b int) bool {
-			if ranked[a].norm != ranked[b].norm {
-				return ranked[a].norm > ranked[b].norm
+		slices.SortFunc(ranked, func(a, b scored) int {
+			if a.norm != b.norm {
+				return cmp.Compare(b.norm, a.norm) // 降序
 			}
-			return snapshots[ranked[a].idx].CreatedAt.After(snapshots[ranked[b].idx].CreatedAt)
+			if snapshots[a.idx].CreatedAt.After(snapshots[b.idx].CreatedAt) {
+				return -1
+			} else if snapshots[a.idx].CreatedAt.Before(snapshots[b.idx].CreatedAt) {
+				return 1
+			}
+			return 0
 		})
 	}