Show viewer counts compactly rather than by system locale

Driving the TV view against a live server turned up 74,71,034 watching
Yahoo Finance. That is 7,471,034 grouped in lakhs, which is what
toLocaleString does on an Indian machine and is correct there — but it sits
in a column beside US market data, where a reader parses digit groups
without thinking about it and gets the wrong magnitude for a moment.

Compact form fixes both halves at once. "7.5M" carries the whole meaning in
a third of the width, which is what a rail that gets scanned rather than
read actually wants, and it has no digit grouping to get locale-dependent.

Scoped to the new view deliberately. The rest of the terminal calls bare
toLocaleString in a dozen places and has the same property; changing that
is a decision about the whole UI, not a detail of this one.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: Ben05-sys

app/web/index.html

@@ -2022,6 +2022,11 @@ <h2>KEYS</h2>
 /* ---------- live tv ---------- */
 S.tv = {channels:[], mentions:[], current:null, loaded:false};
 
+const fwatch = n =>
+  n >= 1e6 ? (n/1e6).toFixed(1).replace(/\.0$/,"") + "M"
+: n >= 1e3 ? Math.round(n/1e3) + "K"
+: String(n);
+
 async function loadLiveTv(force){
   const note = document.getElementById("tvNote");
   note.textContent = "checking who is on air…";
@@ -2045,8 +2050,13 @@ <h2>KEYS</h2>
   const bar = document.getElementById("tvChannels");
   bar.innerHTML = S.tv.channels.map(c=>{
     const on = c.id===S.tv.current;
+    // Compact rather than exact: the rail is scanned, and "7.5M" carries
+    // the whole meaning of 7,471,034 in a third of the width. It also
+    // sidesteps digit grouping, which toLocaleString renders by system
+    // locale — 74,71,034 on an Indian machine, which is correct there and
+    // wrong beside a column of US market data.
     const who = c.live && c.viewers
-      ? `<span class="who">${Intl.NumberFormat().format(c.viewers)}</span>` : "";
+      ? `<span class="who">${fwatch(c.viewers)}</span>` : "";
     return `<div class="tvch${c.live?" islive":" off"}${on?" on":""}"`
       + ` data-ch="${esc(c.id)}" title="${esc(c.note||"")}">`
       + `<span class="dot"></span>${esc(c.name)}${who}</div>`;