feat(tabs): every agent tab shows its CLI logo, claude included

A claude tab drew no harness mark at all and every other agent CLI a
two-letter text pill (DS, CX, ...), so a claude tab read as "no harness"
next to its neighbours. Session tabs (header strip, side rail, sidebar,
phone chips) and the desktop home rail now draw the agent through PR
#532's run-mode-dot <id> slot, the id as data, the same mark the Run
menus and the tile and split headers use. The shell is not an agent and
keeps its SH pill; a CLI added through clis.json gets the slot's plain
dot instead of nothing.

The per-CLI tab pill colours and their light-skin ink overrides are gone
(the monochrome marks follow the tab's own text colour), and the logo
steps aside with the other adornments while a compact rail row renames.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/web/public/entrance-animations.js

@@ -692,6 +692,7 @@ Object.assign(CodemanApp.prototype, {
         <span class="tab-number">${base + i + 1}</span>
         <span class="tab-status idle" aria-hidden="true"></span>
         <span class="tab-info"><span class="tab-name-row">
+          <span class="tab-harness run-mode-dot claude" aria-hidden="true"></span>
           <span class="tab-name">w${base + i + 1}-demo</span>
         </span></span>`;
       container.appendChild(tab);