Serve the Progmasoft mark as the site iconfeature/site-icons

The sites declared no icon and /favicon.ico answered 404, so search
engines and assistants that show a site's icon (DuckDuckGo, ChatGPT)
fell back to a gray placeholder; the only copy of the mark was the BIMI
logo for mail.

The app now has the Next.js icon files, so every page links them:

- app/icon.svg: the four squares of the BIMI logo, cropped to the mark
  so it fills a browser tab, on a transparent field.
- app/favicon.ico: the same mark at 16, 32 and 48 pixels (PNG entries),
  for clients that ask for /favicon.ico without reading the page.
- app/apple-icon.png: 180 pixels on the white field of the BIMI logo,
  since iOS fills transparency with black.

The proxy rewrites paths per host, which would send /icon.svg on the
account, ViGet and the other hosts into their own page trees; the
matcher now skips the two new files as it already skipped favicon.ico,
so every Progmasoft host serves the same icons.

4 files changed, 8 insertions, 1 deletions

diff --git a/apps/web/app/apple-icon.png b/apps/web/app/apple-icon.png
new file mode 100644
index 0000000..dbbbd2f
--- /dev/null
+++ b/apps/web/app/apple-icon.png
diff --git a/apps/web/app/favicon.ico b/apps/web/app/favicon.ico
new file mode 100644
index 0000000..792dba0
--- /dev/null
+++ b/apps/web/app/favicon.ico
diff --git a/apps/web/app/icon.svg b/apps/web/app/icon.svg
new file mode 100644
index 0000000..c7c9ead
--- /dev/null
+++ b/apps/web/app/icon.svg
@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="100 100 312 312">
+  <title>Progmasoft</title>
+  <rect x="112" y="112" width="132" height="132" fill="#3b4658"/>
+  <rect x="268" y="112" width="132" height="132" fill="#1e7188"/>
+  <rect x="112" y="268" width="132" height="132" fill="#7655fa"/>
+  <rect x="268" y="268" width="132" height="132" fill="#dc7644"/>
+</svg>
diff --git a/apps/web/proxy.ts b/apps/web/proxy.ts
index 99e9cc3..6898962 100644
--- a/apps/web/proxy.ts
+++ b/apps/web/proxy.ts
@@ -226,6 +226,6 @@ function internalRoute(request: NextRequest, pathname: string): URL {
 
 export const config = {
   matcher: [
-    "/((?!_next/static|_next/image|favicon.ico|robots.txt|sitemap.xml).*)",
+    "/((?!_next/static|_next/image|favicon.ico|icon.svg|apple-icon.png|robots.txt|sitemap.xml).*)",
   ],
 };