perf: bundle flag icons instead of blocking on a CDN (#99)

index.html loaded two jsdelivr stylesheets synchronously in <head>, which
delayed first paint and failed outright on networks where the CDN is
unreachable. Drop font-logos (unused in src/) and bundle flag-icons
locally so Vite hashes the sprites and serves them from our own origin
with immutable cache headers.

pnpm-lock.yaml

@@ -83,6 +83,9 @@ importers:
       dayjs:
         specifier: 1.11.21
         version: 1.11.21
+      flag-icons:
+        specifier: 7.0.0
+        version: 7.0.0
       i18n-iso-countries:
         specifier: 7.14.0
         version: 7.14.0
@@ -128,13 +131,13 @@ importers:
         version: 4.3.2
       '@testing-library/jest-dom':
         specifier: ^6.9.1
-        version: 6.9.1
+        version: 6.10.0(@testing-library/dom@10.4.1)
       '@testing-library/react':
         specifier: ^16.3.2
         version: 16.3.2(@testing-library/dom@10.4.1)(@types/react-dom@19.2.3(@types/react@19.2.17))(@types/react@19.2.17)(react-dom@19.2.7(react@19.2.7))(react@19.2.7)
       '@testing-library/user-event':
         specifier: ^14.6.1
-        version: 14.6.1(@testing-library/dom@10.4.1)
+        version: 14.6.8(@testing-library/dom@10.4.1)
       '@types/node':
         specifier: 25.9.2
         version: 25.9.2
@@ -1125,9 +1128,11 @@ packages:
     resolution: {integrity: sha512-o4PXJQidqJl82ckFaXUeoAW+XysPLauYI43Abki5hABd853iMhitooc6znOnczgbTYmEP6U6/y1ZyKAIsvMKGg==}
     engines: {node: '>=18'}
 
-  '@testing-library/jest-dom@6.9.1':
-    resolution: {integrity: sha512-zIcONa+hVtVSSep9UT3jZ5rizo2BsxgyDYU7WFD5eICBE7no3881HGeb/QkGfsJs6JTkY1aQhT7rIPC7e+0nnA==}
-    engines: {node: '>=14', npm: '>=6', yarn: '>=1'}
+  '@testing-library/jest-dom@6.10.0':
+    resolution: {integrity: sha512-HQwu0KaB2zyT0iLzBL+8CLyZDL3KlZlZJ+2iyc9uCUnlJVskJU/UlPuVCyIPhtukjPQdT2QNoR5nCP5FqTmmDQ==}
+    engines: {node: '>=22', npm: '>=6', yarn: '>=1'}
+    peerDependencies:
+      '@testing-library/dom': '>=10 <11'
 
   '@testing-library/react@16.3.2':
     resolution: {integrity: sha512-XU5/SytQM+ykqMnAnvB2umaJNIOsLF3PVv//1Ew4CTcpz0/BRyy/af40qqrt7SjKpDdT1saBMc42CUok5gaw+g==}
@@ -1144,8 +1149,8 @@ packages:
       '@types/react-dom':
         optional: true
 
-  '@testing-library/user-event@14.6.1':
-    resolution: {integrity: sha512-vq7fv0rnt+QTXgPxr5Hjc210p6YKq2kmdziLgnsZGgLJ9e6VAShx1pACLuRjd/AS/sr7phAR58OIIpf0LlmQNw==}
+  '@testing-library/user-event@14.6.8':
+    resolution: {integrity: sha512-vgSSqnANMnkcYR/vUNDbwS7aM3OErRLNUG8vCVVlj4oc6cKffUrccX7UAS5AmJQQNZTSibi9z5GvvRZ0aYgUCQ==}
     engines: {node: '>=12', npm: '>=6'}
     peerDependencies:
       '@testing-library/dom': '>=7.21.4'
@@ -1566,6 +1571,9 @@ packages:
       picomatch:
         optional: true
 
+  flag-icons@7.0.0:
+    resolution: {integrity: sha512-U8nkYAJUHDro4SiKjJgnVJnAr6yMHWG7k6+FnV73dnWf/HkQXOZLxkie8qd4ZWR83+L6hQITEWJYgApN4sfUZA==}
+
   fsevents@2.3.3:
     resolution: {integrity: sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==}
     engines: {node: ^8.16.0 || ^10.6.0 || >=11.0.0}
@@ -3032,9 +3040,10 @@ snapshots:
       picocolors: 1.1.1
       pretty-format: 27.5.1
 
-  '@testing-library/jest-dom@6.9.1':
+  '@testing-library/jest-dom@6.10.0(@testing-library/dom@10.4.1)':
     dependencies:
       '@adobe/css-tools': 4.5.0
+      '@testing-library/dom': 10.4.1
       aria-query: 5.3.2
       css.escape: 1.5.1
       dom-accessibility-api: 0.6.3
@@ -3051,7 +3060,7 @@ snapshots:
       '@types/react': 19.2.17
       '@types/react-dom': 19.2.3(@types/react@19.2.17)
 
-  '@testing-library/user-event@14.6.1(@testing-library/dom@10.4.1)':
+  '@testing-library/user-event@14.6.8(@testing-library/dom@10.4.1)':
     dependencies:
       '@testing-library/dom': 10.4.1
 
@@ -3388,6 +3397,8 @@ snapshots:
     optionalDependencies:
       picomatch: 4.0.5
 
+  flag-icons@7.0.0: {}
+
   fsevents@2.3.3:
     optional: true