Name each embedded static file so a missing Alpine.js fails the build (closes #166)

static/static.go embedded the css and js directories, which match
whatever is present, so a build that skipped make assets produced a
binary whose pages had no Alpine.js. It now names the four files the
pages load, so a missing one is a compile error naming it.
css/input.css, the Tailwind source that no page loads, is no longer
embedded or served.

Both lint stages now extract Alpine.js before linting, since the
static package no longer compiles without it.

Model: opus-5-5

Dockerfile.lint

@@ -31,6 +31,10 @@ FROM deps AS lint
 
 COPY . .
 
+# static/static.go embeds the Alpine.js file this extracts from 3p/; without
+# it the static package does not compile and cannot be linted.
+RUN script/assets
+
 # `run` silently ignores config keys it does not recognize, so a typo would
 # disable a setting without a word. `config verify` is what catches that.
 RUN --network=none golangci-lint config verify --config .golangci.yml