sirius.x: portal (sign-in + names), Theseus subpage, drop .com public mention

* portal.html — sign in with a seed phrase (in-memory only, wiped on sign
    out), fetch owned NFT categories across all watched addresses, cross-join
    against BCNR buildIndex to show the wallet's names + records. Read-only
    for now; record edit (UPD) will piggyback on the register bundle's signing
    path. WizardConnect button stubbed with a "soon" pill — the adapter
    already exists in register.html and will be wired in the next pass.
  * theseus/index.html — download page for Theseus Navigator (v0.0.4) and
    Ariadne Resolver (Windows setup + Android APK). Same design system as the
    landing. Links to dl.silentmode.st for the actual binaries and to
    silentmode.st/releases for the manifest.
  * index.html — nav now has 🧭 Theseus and 🔑 Portal chips; "Try it" section
    adds cards for the portal and Theseus.
  * site/tlds/ — .com row removed from the public table; count updated to 14;
    supersedes the "held by operator" language per operator direction.
  * site-sirius-x/index.html — softened ICANN-adjacent note.

All routes verified live: silentmode.st/{tlds,sirius-x,sirius-x/portal.html,
sirius-x/theseus,bns/sirius.x} return 200. Sia mirror updated for all three
new/changed sirius.x pages.

tlds/index.html

@@ -108,11 +108,9 @@
 
 <section id="current">
   <h2>Current TLDs (chipnet)</h2>
-  <p class="lede">Fifteen TLDs are minted on the chipnet TLD beacon as of
+  <p class="lede">Fourteen TLDs are offered for public name registration on the chipnet TLD
-     2026-08-29. Fourteen are offered for public name registration; one is
+     beacon as of 2026-08-29. The live count on the chain is the authoritative source — this table
-     <b>held</b> by the operator (cert on-chain, no second-level names offered).
+     may lag by minutes until the beacon confirms.</p>
-     Live count on the chain is the authoritative source — this table may lag
-     by minutes until the beacon confirms.</p>
   <table class="tlds">
     <thead><tr><th>TLD</th><th>Category (short)</th><th>Status</th></tr></thead>
     <tbody>
@@ -130,7 +128,6 @@
       <tr><td class="tld">.dex</td>  <td class="cat">9b230313b823202c…</td><td><span class="status">public</span></td></tr>
       <tr><td class="tld">.cex</td>  <td class="cat">69fd93aedee3d353…</td><td><span class="status">public</span></td></tr>
       <tr><td class="tld">.nt</td>   <td class="cat">5d18221bccaab2c0…</td><td><span class="status">public</span></td></tr>
-      <tr><td class="tld">.com</td>  <td class="cat">211d51c2eef67013…</td><td><span class="status held">held by operator</span></td></tr>
     </tbody>
   </table>
 </section>