Initial QSfera import

Server/vendor/github.com/olekukonko/tablewriter/pkg/twwidth/cache.go

@@ -0,0 +1,26 @@
+package twwidth
+
+import "github.com/olekukonko/tablewriter/pkg/twcache"
+
+// widthCache stores memoized results of Width calculations to improve performance.
+var widthCache *twcache.LRU[cacheKey, int]
+
+type cacheKey struct {
+	eastAsian bool
+	str       string
+}
+
+// SetCacheCapacity changes the cache size dynamically
+// If capacity <= 0, disables caching entirely
+func SetCacheCapacity(capacity int) {
+	mu.Lock()
+	defer mu.Unlock()
+
+	if capacity <= 0 {
+		widthCache = nil // nil = fully disabled
+		return
+	}
+
+	newCache := twcache.NewLRU[cacheKey, int](capacity)
+	widthCache = newCache
+}