feat: localchat, a Go + Templ + HTMX chat app for local Gemma models

Streams replies over SSE from any OpenAI-compatible server (oMLX,
llama.cpp, Ollama, ...). Single binary that can install itself as an
OS service; docker compose bundles llama.cpp + Gemma 4 E2B.

internal/web/views/markdown.go

@@ -0,0 +1,29 @@
+package views
+
+import (
+	"bytes"
+
+	"github.com/a-h/templ"
+	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/extension"
+)
+
+// md renders CommonMark + GFM. Raw HTML in model output is escaped
+// (goldmark's default), so a reply can't inject markup into the page.
+var md = goldmark.New(goldmark.WithExtensions(extension.GFM))
+
+// Markdown renders model output as HTML, falling back to plain text.
+func Markdown(src string) templ.Component {
+	var buf bytes.Buffer
+	if err := md.Convert([]byte(src), &buf); err != nil {
+		return Token(src)
+	}
+	return templ.Raw(buf.String())
+}
+
+func healthTrigger(h HealthInfo) string {
+	if h.Checking {
+		return "load"
+	}
+	return "every 30s"
+}