fix: cascade dashboard relative-time labels beyond hours (#75)

The Live Sessions project list showed raw hour counts (e.g. "999h ago")
with no upper bound. Roll over into days past 24h, weeks past 7d, and
years past 52w so long-idle projects read as "41d 15h ago" instead.

Author: pacphi

src/lib/dashboard/live/client.mjs

@@ -24,7 +24,7 @@ export const LIVE_JS = `
   function esc(s){return String(s==null?"":s).replace(/[&<>"']/g,function(c){return{"&":"&amp;","<":"&lt;",">":"&gt;",'"':"&quot;","'":"&#39;"}[c];});}
   function short(s,n){s=String(s||"");return s.length>n?s.slice(0,n-1)+"…":s;}
   function title(s){return String(s||"activity").replace(/[._-]+/g," ").replace(/\\b\\w/g,function(c){return c.toUpperCase();});}
-  function ago(v){var at=Date.parse(v||""),ms=Date.now()-at;if(!Number.isFinite(ms))return"";var s=Math.max(0,Math.round(ms/1000));if(s<5)return"just now";if(s<60)return s+"s ago";var m=Math.round(s/60);return m<60?m+"m ago":Math.round(m/60)+"h ago";}
+  function ago(v){var at=Date.parse(v||""),ms=Date.now()-at;if(!Number.isFinite(ms))return"";var s=Math.max(0,Math.round(ms/1000));if(s<5)return"just now";if(s<60)return s+"s ago";var m=Math.round(s/60);if(m<60)return m+"m ago";var h=Math.round(m/60);if(h<24)return h+"h ago";var d=Math.floor(h/24),rh=h%24;if(d<7)return d+"d "+rh+"h ago";var w=Math.floor(d/7),rd=d%7;if(w<52)return w+"w "+rd+"d ago";var y=Math.floor(w/52),rw=w%52;return y+"y "+rw+"w ago";}
   function hostOf(v){return String(v&&v.host||"internal").toLowerCase();}
   function hostName(v){var h=hostOf(v);return{claude:"Claude Code",codex:"Codex",internal:"Internal"}[h]||title(h);}
   function hostGlyph(v){return{claude:"✳",codex:"◉",internal:"⌁"}[hostOf(v)]||"⌁";}