web: the muted text that was never muted, and the stylesheet fetched every time

Every text-[color:var(--ink)]/50, border-[color:var(--ink)]/10 and
bg-[color:var(--ink)]/5 in the templates compiled to nothing. Tailwind v3
cannot put an opacity on an arbitrary var() colour, so all 538 of them were
dropped from output.css without a word. Meta text rendered at full ink, card
borders fell back to Tailwind's default grey (bright white rings at night),
and the washes, backdrops and hover pills simply weren't there, on the news
site, the casino and the adventure pages alike.

The palette is now written once per phase and casino room as bare rgb
channels (--ink-rgb and friends), the plain vars are built from them, and
tailwind.config.js exposes ink, muted, accent, warn and card as real colours.
The classes are text-ink/80, border-ink/10, bg-accent/20 now, and they compile.

Restoring the intended opacities as-is would have traded flat for illegible:
ink at 50% measures 2.7 to 2.9:1 on the lit phases. So secondary text gets
its own colour, --muted, per phase and per casino room, taken as faint as it
can go while still clearing 4.5:1 on both the card and the page. Everything
that was ink at 35 to 70% is text-muted. The 20-30% ones are separators and
empty-cell dashes and stay faint.

The bg-theme-* chips carry white text everywhere they appear, and eight of
them measured 2.5 to 3.2:1. Same hues, taken just dark enough to pass (4.6 to
4.7:1). eu, lego and adventure already passed and are unchanged, and the
underline and border colours keep the old pastels since they carry no text.

Static files came out of the embedded FS with no Last-Modified, no ETag and
no Cache-Control, so every page view downloaded the stylesheet and every
script in full, and the service worker's "cheap 304" never happened. Each
file is hashed once now. Templates link through {{asset}}, which appends
?v=<hash>; a request naming the current hash is served immutable for a year,
and everything else gets the hash as its ETag and revalidates to a 304. The
service worker serves versioned URLs cache-first, drops older versions of the
same file as new ones land, and moves to cache v6.

internal/web/templates/status.html

@@ -3,15 +3,15 @@
 {{define "main"}}
 {{$admin := .Admin}}
 <section class="mt-2 mb-8">
-  <div class="rounded-3xl bg-[color:var(--card)] border-2 border-[color:var(--ink)]/10 p-6 sm:p-8 shadow-pete">
-    <p class="text-sm uppercase tracking-[0.2em] text-[color:var(--ink)]/50">{{if $admin}}owner view{{else}}live status{{end}}</p>
+  <div class="rounded-3xl bg-card border-2 border-ink/10 p-6 sm:p-8 shadow-pete">
+    <p class="text-sm uppercase tracking-[0.2em] text-muted">{{if $admin}}owner view{{else}}live status{{end}}</p>
     <h1 class="font-display text-3xl sm:text-4xl font-bold mt-1">Source health</h1>
-    <p class="mt-2 max-w-2xl text-[color:var(--ink)]/70">
+    <p class="mt-2 max-w-2xl text-muted">
       {{if $admin}}Per-feed poll status and content stats. Rows that are currently failing float to the top.
       {{else}}Every feed Pete follows and whether it's still updating. This runs on a best-effort basis, so a source going quiet for a bit is normal.{{end}}
     </p>
     <div class="mt-4 flex flex-wrap gap-2">
-      <span class="inline-flex items-center gap-1.5 rounded-full bg-[color:var(--ink)]/5 px-3 py-1 text-sm font-semibold tabular-nums">
+      <span class="inline-flex items-center gap-1.5 rounded-full bg-ink/5 px-3 py-1 text-sm font-semibold tabular-nums">
         {{len .Sources}} sources
       </span>
       {{if .DegradedCnt}}
@@ -34,15 +34,15 @@
 <section class="mb-8">
   <div class="rounded-3xl bg-amber-500/10 border-2 border-amber-500/30 p-6">
     <h2 class="font-display text-xl font-bold">Dispatches with no template</h2>
-    <p class="mt-1 text-sm text-[color:var(--ink)]/70 max-w-2xl">
+    <p class="mt-1 text-sm text-muted max-w-2xl">
       gogobee sent these event types since the last restart and Pete published them on the
       generic fallback. Nothing was lost — they just read thin until he learns the words.
     </p>
     <ul class="mt-3 flex flex-wrap gap-2">
       {{range .UnknownAdv}}
-      <li class="inline-flex items-center gap-2 rounded-full bg-[color:var(--card)] border border-amber-500/40 px-3 py-1 text-sm">
+      <li class="inline-flex items-center gap-2 rounded-full bg-card border border-amber-500/40 px-3 py-1 text-sm">
         <code class="font-mono">{{.EventType}}</code>
-        <span class="tabular-nums text-[color:var(--ink)]/60">×{{.Count}}</span>
+        <span class="tabular-nums text-muted">×{{.Count}}</span>
       </li>
       {{end}}
     </ul>
@@ -50,10 +50,10 @@
 </section>
 {{end}}
 
-<div class="overflow-x-auto rounded-3xl bg-[color:var(--card)] border-2 border-[color:var(--ink)]/10 shadow-pete">
+<div class="overflow-x-auto rounded-3xl bg-card border-2 border-ink/10 shadow-pete">
   <table class="w-full {{if $admin}}min-w-[52rem]{{else}}min-w-[28rem]{{end}} text-sm">
     <thead>
-      <tr class="text-left text-[color:var(--ink)]/50 uppercase text-xs tracking-wider border-b-2 border-[color:var(--ink)]/10">
+      <tr class="text-left text-muted uppercase text-xs tracking-wider border-b-2 border-ink/10">
         <th class="px-4 py-3 font-semibold">Source</th>
         <th class="px-4 py-3 font-semibold">Channel</th>
         <th class="px-4 py-3 font-semibold">Status</th>
@@ -70,12 +70,12 @@
     </thead>
     <tbody>
       {{range .Sources}}
-      <tr class="border-b border-[color:var(--ink)]/5 last:border-0 align-top">
+      <tr class="border-b border-ink/5 last:border-0 align-top">
         <td class="px-4 py-3 font-semibold whitespace-nowrap">{{.Name}}</td>
-        <td class="px-4 py-3 text-[color:var(--ink)]/70 whitespace-nowrap">{{.Channel}}</td>
+        <td class="px-4 py-3 text-muted whitespace-nowrap">{{.Channel}}</td>
         <td class="px-4 py-3 whitespace-nowrap">
           {{if .NeverRun}}
-            <span class="inline-flex items-center gap-1.5 rounded-full bg-[color:var(--ink)]/10 px-2.5 py-1 text-xs font-semibold">◌ idle</span>
+            <span class="inline-flex items-center gap-1.5 rounded-full bg-ink/10 px-2.5 py-1 text-xs font-semibold">◌ idle</span>
           {{else if .Healthy}}
             <span class="inline-flex items-center gap-1.5 rounded-full bg-emerald-500/15 text-emerald-700 dark:text-emerald-300 px-2.5 py-1 text-xs font-semibold">● live</span>
           {{else if $admin}}
@@ -85,25 +85,25 @@
             <span class="inline-flex items-center gap-1.5 rounded-full bg-red-500/15 text-red-700 dark:text-red-300 px-2.5 py-1 text-xs font-semibold">✕ delayed</span>
           {{end}}
         </td>
-        <td class="px-4 py-3 text-[color:var(--ink)]/70 whitespace-nowrap">{{if .LastSuccessAt.IsZero}}never{{else}}{{timeAgo .LastSuccessAt}}{{end}}</td>
+        <td class="px-4 py-3 text-muted whitespace-nowrap">{{if .LastSuccessAt.IsZero}}never{{else}}{{timeAgo .LastSuccessAt}}{{end}}</td>
         {{if $admin}}
-        <td class="px-4 py-3 text-[color:var(--ink)]/70 whitespace-nowrap">{{if .LastPollAt.IsZero}}never{{else}}{{timeAgo .LastPollAt}}{{end}}</td>
+        <td class="px-4 py-3 text-muted whitespace-nowrap">{{if .LastPollAt.IsZero}}never{{else}}{{timeAgo .LastPollAt}}{{end}}</td>
         <td class="px-4 py-3 text-right tabular-nums">{{.LastItemCount}}</td>
         <td class="px-4 py-3 text-right tabular-nums" title="{{.Classified}} classified of {{.Total}}">{{.Total}}</td>
         <td class="px-4 py-3 text-right tabular-nums {{if gt .PaywallRate 50}}text-amber-600 dark:text-amber-400 font-semibold{{end}}">
           {{if .Total}}{{.PaywallRate}}%{{else}}—{{end}}
         </td>
-        <td class="px-4 py-3 text-[color:var(--ink)]/70 whitespace-nowrap">{{if .LastSeenAt.IsZero}}—{{else}}{{timeAgo .LastSeenAt}}{{end}}</td>
-        <td class="px-4 py-3 text-[color:var(--ink)]/70 whitespace-nowrap">{{if .LastPostedAt.IsZero}}—{{else}}{{timeAgo .LastPostedAt}}{{end}}</td>
+        <td class="px-4 py-3 text-muted whitespace-nowrap">{{if .LastSeenAt.IsZero}}—{{else}}{{timeAgo .LastSeenAt}}{{end}}</td>
+        <td class="px-4 py-3 text-muted whitespace-nowrap">{{if .LastPostedAt.IsZero}}—{{else}}{{timeAgo .LastPostedAt}}{{end}}</td>
         {{end}}
       </tr>
       {{if $admin}}{{if .LastError}}{{if not .Healthy}}
-      <tr class="border-b border-[color:var(--ink)]/5">
+      <tr class="border-b border-ink/5">
         <td colspan="10" class="px-4 pb-3 -mt-1 text-xs text-red-600 dark:text-red-400 font-mono break-all">{{.LastError}}</td>
       </tr>
       {{end}}{{end}}{{end}}
       {{else}}
-      <tr><td colspan="{{if $admin}}10{{else}}4{{end}}" class="px-4 py-8 text-center text-[color:var(--ink)]/50">No sources configured.</td></tr>
+      <tr><td colspan="{{if $admin}}10{{else}}4{{end}}" class="px-4 py-8 text-center text-muted">No sources configured.</td></tr>
       {{end}}
     </tbody>
   </table>