feat: add icon picker for tags with Iconify integration

- Add icon field to tag creation/update API and handlers
- Install @iconify packages (json, types, utils) as production deps
- Build IconPicker component for tag admin UI
- Fix apiFetch lazy initialization for build-time safety
- Update Docker to install production dependencies for SSR runtime

web/bun.lock

@@ -8,6 +8,9 @@
         "@fontsource-variable/schibsted-grotesk": "^5.2.8",
         "@fontsource/hanken-grotesk": "^5.1.0",
         "@fontsource/schibsted-grotesk": "^5.2.8",
+        "@iconify/json": "^2.2.425",
+        "@iconify/types": "^2.0.0",
+        "@iconify/utils": "^3.1.0",
         "@logtape/logtape": "^1.3.5",
         "@resvg/resvg-js": "^2.6.2",
         "@xevion/satori-html": "^0.4.1",
@@ -20,7 +23,6 @@
       "devDependencies": {
         "@eslint/js": "^9.39.2",
         "@fontsource/inter": "^5.2.8",
-        "@iconify/json": "^2.2.424",
         "@sveltejs/kit": "^2.21.0",
         "@sveltejs/vite-plugin-svelte": "^6.2.1",
         "@tailwindcss/vite": "^4.1.11",
@@ -140,7 +142,7 @@
 
     "@humanwhocodes/retry": ["@humanwhocodes/retry@0.4.3", "", {}, "sha512-bV0Tgo9K4hfPCek+aMAn81RppFKv2ySDQeMoSZuvTASywNTnVJCArCZE2FWqpvIatKu7VMRLWlR1EazvVhDyhQ=="],
 
-    "@iconify/json": ["@iconify/json@2.2.424", "", { "dependencies": { "@iconify/types": "*", "pathe": "^2.0.3" } }, "sha512-Lxx8ad2DgyTGV88ec0mlaJ+OSjr0SyU0j8Awfbxl9JrxxHmBEFQJ+jywhztWAhLnaMUG3+G1htNJYzEsoAsNMQ=="],
+    "@iconify/json": ["@iconify/json@2.2.425", "", { "dependencies": { "@iconify/types": "*", "pathe": "^2.0.3" } }, "sha512-RJcJeoLFAmKPr7e7bP7gw33ASBSONuFsiCg35cEvrf/s8DDG5+C9eSqOvIiggNwZwwjYeGNKIJ7RduJTWgN0IQ=="],
 
     "@iconify/types": ["@iconify/types@2.0.0", "", {}, "sha512-+wluvCrRhXrhyOmRDJ3q8mux9JkKy5SJ/v8ol2tu4FVjyYvtEzkc/3pK15ET6RKg4b4w4BmTk1+gsCUhf21Ykg=="],