Add Legal Analysis tool — two-pass DBN-legal pipeline

Restores the dbn-legal-agent-v3 fine-tune on ocelot (was silently aliased
to plain qwen2.5:14b in LiteLLM since the viper retirement) and ships a
new tool that uses it via a two-pass flow:

  Pass 1 (Azure 4o-mini)  → extract up to 5 distinct legal issues
  Pass 2 (ocelot v3 only) → answer each issue, ≤350 tokens, with corpus
  Pass 3 (Azure 4o-mini)  → synthesise overall assessment + next steps

The 12GB-VRAM constraint motivates the split: dbn-legal-agent-v3 stays
hot in VRAM through the 5 sequential per-issue calls because issue
extraction and synthesis run on Azure, not on ocelot.

New surface:
  - includes/LegalAnalysisAgent.php
  - api/legal-analysis.php           (NDJSON streaming endpoint)
  - legal-analysis.php               (dedicated tool page)
  - assets/js/legal-analysis.js      (streamed UI with per-issue cards)
  - Save-result + case-result.php rendering for legal-analysis output
  - Nav registration in all four UI languages

Add-on integration: a "⚖️🇳🇴 Run deep legal analysis on this text"
button now appears on Summarize, Ask, and Redact result pages and
streams the same pipeline inline below the existing result.

Existing tools relabelled: the misleading "🇳🇴 Norwegian specialist v3 ⭐"
option on advocate/deep-research/discrepancy/barnevernet is now honestly
"DBN Legal Agent" — now that the real fine-tune is actually deployed,
the label finally matches reality. The advocate.php v2 option was
removed since the v2 GGUF is retired.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

includes/CaseResults.php

@@ -33,6 +33,7 @@ final class CaseResults
         'ask',
         'redact',
         'transcribe',
+        'legal-analysis',
     ];
 
     /** True when the user is on a tier that gets saved results (Plus, Pro, or active Plus trial). */
@@ -234,10 +235,11 @@ final class CaseResults
             'deep-research' => 'Dyp analyse',
             'discrepancy'   => 'Motstrid',
             'timeline'      => 'Tidslinje',
-            'summarize'     => 'Sammendrag',
-            'ask'           => 'Spørsmål & svar',
-            'redact'        => 'Anonymisering',
-            'transcribe'    => 'Transkripsjon',
+            'summarize'      => 'Sammendrag',
+            'ask'            => 'Spørsmål & svar',
+            'redact'         => 'Anonymisering',
+            'transcribe'     => 'Transkripsjon',
+            'legal-analysis' => 'Juridisk analyse',
         ][$tool] ?? ucfirst($tool);
     }
 
@@ -251,10 +253,11 @@ final class CaseResults
             'deep-research' => '🔬',
             'discrepancy'   => '🔍',
             'timeline'      => '📅',
-            'summarize'     => '📝',
-            'ask'           => '💬',
-            'redact'        => '🖊️',
-            'transcribe'    => '🎙️',
+            'summarize'      => '📝',
+            'ask'            => '💬',
+            'redact'         => '🖊️',
+            'transcribe'     => '🎙️',
+            'legal-analysis' => '⚖️🇳🇴',
         ][$tool] ?? '📄';
     }
 
@@ -272,6 +275,7 @@ final class CaseResults
             'ask'           => [$input['question'] ?? null],
             'redact'        => [$input['text'] ?? null],
             'transcribe'    => [$input['filename'] ?? null],
+            'legal-analysis' => [$input['doc_type'] ?? null, $input['text'] ?? null],
             default         => [$input['title'] ?? null, $input['query'] ?? null, $input['text'] ?? null],
         };
         foreach ($candidates as $c) {