feat(tools): persona-driven multi-domain corpus + model routing

Generalize the family-locked legal tools into caveauAI persona profiles
(client 57 chat profiles, resolved in-process via the chat_profiles bridge).
Each tool accepts an optional `profile` slug that scopes the corpus package(s),
search method, system prompt and synthesis model; omitting it falls back to the
family-legal package so existing behaviour is unchanged.

- dbnToolsResolvePersona / dbnToolsListPersonas / dbnToolsBootChatProfiles in
  bootstrap.php; new api/personas.php + dbn.list_personas MCP tool.
- LegalTools search/ask/corpusContextForSummarize and the BvjAnalyzer /
  LegalAnalysis / translate paths take the persona's packages + prompt + model.
- Persona <select> on ask/search/summarize (populated from api/personas.php).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

api/translate.php

@@ -70,12 +70,22 @@ try {
     $sourceName = dbnToolsLanguageName($sourceLang);
     $targetName = dbnToolsLanguageName($targetLang);
 
+    // Persona-aware domain framing (default = Norwegian family law for back-compat).
+    $client      = dbnToolsRequireClient();
+    $personaSlug = (isset($input['profile']) && is_string($input['profile']) && trim($input['profile']) !== '')
+        ? trim($input['profile'])
+        : null;
+    $persona     = dbnToolsResolvePersona((int)$client['id'], $personaSlug);
+    $domainLabel = (isset($persona['name']) && is_string($persona['name']) && trim($persona['name']) !== '' && ($persona['source'] ?? '') === 'chat_profile')
+        ? trim($persona['name'])
+        : 'Norwegian family law, ECHR, and child-welfare proceedings';
+
     $docTypeHint = $docType !== 'auto'
-        ? "The document is of type: {$docType}. Apply appropriate Norwegian family-law terminology for this context."
+        ? "The document is of type: {$docType}. Apply appropriate {$domainLabel} terminology for this context."
         : '';
 
     $systemPrompt = <<<PROMPT
-You are a professional legal translator specialising in Norwegian family law, ECHR, and child-welfare proceedings.
+You are a professional legal translator specialising in {$domainLabel}.
 
 Task: Translate the provided text from {$sourceName} into {$targetName}.