Timeline: group same-date/actor events, clean badges, Bedrock routing

- renderTimeline(): group consecutive same-date+actor events into one card
  with a bullet list; single events keep their current layout
- Date format: YYYY-MM-DD → "1 Jun 2023" (3-letter month, international)
- Time shown in header when available
- Remove date_type badge; confidence badge replaced by amber ⚠ flag on
  low-confidence events only (high/medium border colour still shows)
- LegalTools.php: resolve azure_full/azure_mini to Bedrock Sonnet/Haiku
  when DbnBedrockGateway is active; claude_sonnet/claude_haiku also handled
- timeline.php + api/timeline.php: engine labels updated (Claude Haiku/Sonnet);
  claude_haiku + claude_sonnet added to valid engine list
- i18n engine labels updated in all 4 languages

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

assets/css/tools.css

@@ -849,6 +849,29 @@ p {
   font-size: 0.82rem;
 }
 
+.confidence-low-flag {
+  color: #d97706;
+  font-size: 0.88rem;
+  margin-left: 4px;
+  vertical-align: middle;
+  flex-shrink: 0;
+}
+
+.timeline-bullets {
+  margin: 4px 0 0 0;
+  padding-left: 1.25em;
+  list-style: disc;
+}
+
+.timeline-bullet {
+  margin: 4px 0;
+  line-height: 1.45;
+}
+
+.timeline-bullet .timeline-excerpt {
+  margin-top: 2px;
+}
+
 .confidence-badge {
   font-size: 0.7rem;
   font-weight: 600;