Remove point-in-time HOST2 status from the codebase

Comments asserting a partner is down, being rebuilt or not yet installed are true on the day they are written and wrong afterwards, and nothing prompts anyone to revisit them. Behaviour is described generically; current state belongs in operator memory, not in tracked files.

Plugin/unraid/pages/ai.php

@@ -470,7 +470,7 @@ vv_ai_chat_markup('vv-ai', [
     <span id="vv-ai-mem-count" style="margin-left:auto;font-size:10px;color:#3a3a3a;font-family:monospace;"></span>
   </div>
   <textarea id="vv-ai-mem-text" class="vv-ai-input" rows="10" spellcheck="false"
-    placeholder="Who you are, how this install is set up, decisions already made, things it should stop asking.&#10;&#10;e.g.&#10;- HOST2 (unRAID-Jayred36) is being rebuilt and is offline. Do not suggest syncing to it.&#10;- RSYNC_ENABLED is deliberately false until HOST2 is onboarded.&#10;- I verify everything before trusting it. Show your sources."></textarea>
+    placeholder="Who you are, how this install is set up, decisions already made, things it should stop asking.&#10;&#10;e.g.&#10;- Media lives on the array, never on the cache pool. Do not suggest moving it.&#10;- RSYNC_ENABLED is deliberately false right now. Do not suggest turning it on.&#10;- I verify everything before trusting it. Show your sources."></textarea>
   <div style="display:flex;gap:8px;align-items:center;margin-top:7px;">
     <span id="vv-ai-mem-status" style="font-size:10px;color:#4a4a4a;"></span>
     <button class="vv-ai-btn ghost" style="margin-left:auto" id="vv-ai-mem-cancel" type="button">Close</button>
@@ -967,7 +967,7 @@ vv_ai_chat_markup('vv-ai', [
     // of ordinary suggestions read as a card of problems.
     //
     // A decision is not final. An accepted line joins every future prompt and nothing expires it,
-    // so a fact that is true today — HOST2 is offline — needs a way back out on the day it stops
+    // so a fact that is true today — a gate is off, a host is unreachable — needs a way back out on the day it stops
     // being true. Retract is that way; Keep is the same door in the other direction.
     const B = (act, cls, label, tip) =>
       `<button class="vv-ai-btn${cls}" data-mem-act="${act}" data-id="${esc(r.id)}" `

Plugin/unraid/pages/readme/ui-map.md

@@ -1256,7 +1256,7 @@ Saved into `master.conf`, which does not need to be opened by hand.
 
 | Setting | Control | Where | What it does |
 |---|---|---|---|
-| `CONF_SYNC_ENABLED` | a switch | in this section | HOST2 rebuild in progress — re-enable when HOST2 is back online |
+| `CONF_SYNC_ENABLED` | a switch | in this section | partner conf caching — armed by onboard Step 1d |
 
 ## Critical Containers