chore: bump version to v0.50.54, update CHANGELOG

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Hermes Web UI -- Changelog
 
+## [v0.50.54] — 2026-04-15
+
+### Changed
+- **OpenRouter model list** — updated to 14 current models across 7 providers. All slugs verified live against the OpenRouter catalog. Removed `o4-mini`, old Gemini 2.x entries, and Llama 4. Added Claude Opus 4.6, GPT-5.4, Gemini 3.1 Pro Preview, Gemini 3 Flash Preview, DeepSeek R1, Qwen3 Coder, Qwen3.6 Plus, Grok 4.20, and Mistral Large. Both Claude 4.6 and 4.5 generations preserved. Fixed `grok-4-20` → `grok-4.20` slug and Gemini `-preview` suffixes.
+
 ## [v0.50.53] — 2026-04-15
 
 ### Fixed

static/index.html

@@ -553,7 +553,7 @@
                 <div class="settings-section-title">System</div>
                 <div class="settings-section-meta">Instance version and access controls.</div>
               </div>
-              <span class="settings-version-badge">v0.50.53</span>
+              <span class="settings-version-badge">v0.50.54</span>
             </div>
             <div class="settings-field" style="border-top:1px solid var(--border);padding-top:12px;margin-top:8px">
               <label for="settingsPassword" data-i18n="settings_label_password">Access Password</label>