fix: UI overhaul — align all HTMX views with Lumina Design System (46 fixes)

- All 7 pages rewritten: Dashboard, Terminal, Snippets, Keychain, SFTP, Settings, Brief
- Apply consistent Lumina glassmorphic theme (rounded-2xl, shadows, borders, tracking)
- Fix SVG icons not rendering — return template.HTML instead of string
- Fix Alpine x-data scoping: terminal tabs, SFTP modals, snippet tag buttons
- Fix dashboard search sending literal ?q=...
- Rebuild CSS with all new Tailwind classes (62KB)
- Add .air.toml with hot-reload config, docs/PERBAIKANUI.md checklist
- Remove unused backup partials

app/backend/internal/model/keychain.go

@@ -1,11 +1,15 @@
 package model
 
 type Key struct {
-	ID         string `json:"id"`
-	Name       string `json:"name"`
-	Username   string `json:"username"`
-	URL        string `json:"url"`
-	Passphrase string `json:"passphrase"`
-	Strength   string `json:"strength"`
-	CreatedAt  string `json:"createdAt"`
+	ID             string   `json:"id"`
+	Name           string   `json:"name"`
+	Username       string   `json:"username"`
+	Passphrase     string   `json:"passphrase"`
+	Strength       string   `json:"strength"`
+	Type           string   `json:"type"`
+	URL            string   `json:"url"`
+	Fingerprint    string   `json:"fingerprint"`
+	ConnectedHosts []string `json:"connectedHosts"`
+	KeyFile        string   `json:"keyFile"`
+	CreatedAt      string   `json:"createdAt"`
 }