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/handler/snippets.go

@@ -1,40 +1,88 @@
 package handler
 
 import (
+	"encoding/json"
+
 	"github.com/gofiber/fiber/v2"
+	"git.tukangketik.id/swanadiva/hostkeeper/v2/internal/model"
 	"git.tukangketik.id/swanadiva/hostkeeper/v2/internal/store"
 )
 
+func jsonOrEmpty(v interface{}) string {
+	b, err := json.Marshal(v)
+	if err != nil {
+		return "[]"
+	}
+	return string(b)
+}
+
+func allTags(snippets []model.Snippet) []string {
+	seen := map[string]bool{}
+	var out []string
+	for _, sn := range snippets {
+		for _, t := range sn.Tags {
+			if !seen[t] {
+				seen[t] = true
+				out = append(out, t)
+			}
+		}
+	}
+	return out
+}
+
 var snippetStore = store.NewSnippetStore()
 
 func Snippets(c *fiber.Ctx) error {
+	if c.Get("HX-Request") != "" {
+		return SnippetGrid(c)
+	}
 	snippets := snippetStore.All()
 	return c.Render("snippets", fiber.Map{
-		"View":      "snippets",
-		"Title":     "Snippets",
-		"Snippets":  snippets,
-		"NavItems":  navItems,
+		"View":          "snippets",
+		"Title":         "Snippets",
+		"Snippets":      snippets,
+		"SnippetsJSON":  jsonOrEmpty(snippets),
+		"AllTags":       allTags(snippets),
+		"NavItems":      navItems,
 	})
 }
 
 func SnippetGrid(c *fiber.Ctx) error {
 	q := c.Query("q", "")
-	snippets := snippetStore.Search(q)
-	return c.Render("snippet_grid", fiber.Map{"Snippets": snippets})
+	collection := c.Query("collection", "")
+	tag := c.Query("tag", "")
+	snippets := snippetStore.Search(q, collection, tag)
+	return c.Render("snippet_grid", fiber.Map{
+		"Snippets":     snippets,
+		"SnippetsJSON": jsonOrEmpty(snippets),
+	})
 }
 
 func CreateSnippet(c *fiber.Ctx) error {
 	name := c.FormValue("name")
 	content := c.FormValue("content")
 	language := c.FormValue("language")
-	snippetStore.Add(name, content, language, nil)
+	description := c.FormValue("description")
+	collection := c.FormValue("collection")
+	tagStr := c.FormValue("tags")
+	var tags []string
+	if tagStr != "" {
+		tags = []string{tagStr}
+	}
+	snippetStore.Add(name, content, language, tags, description, collection)
 	snippets := snippetStore.All()
-	return c.Render("snippet_grid", fiber.Map{"Snippets": snippets})
+	return c.Render("snippet_grid", fiber.Map{
+		"Snippets":     snippets,
+		"SnippetsJSON": jsonOrEmpty(snippets),
+	})
 }
 
 func DeleteSnippet(c *fiber.Ctx) error {
 	id := c.Params("id")
 	snippetStore.Delete(id)
 	snippets := snippetStore.All()
-	return c.Render("snippet_grid", fiber.Map{"Snippets": snippets})
+	return c.Render("snippet_grid", fiber.Map{
+		"Snippets":     snippets,
+		"SnippetsJSON": jsonOrEmpty(snippets),
+	})
 }