Prepare release v2026-02-13.2: changelog, README feature table

Author: Dennis Braun

README.md

@@ -69,6 +69,7 @@ Open `http://localhost:8765`, enter your router login, done. [Full installation
 | **[Speedtest Integration](https://github.com/itsDNNS/docsight/wiki/Features-Speedtest)** | Speed test history from [Speedtest Tracker](https://github.com/alexjustesen/speedtest-tracker) |
 | **[Incident Journal](https://github.com/itsDNNS/docsight/wiki/Features-Incident-Journal)** | Document ISP issues with attachments |
 | **[Complaint Generator](https://github.com/itsDNNS/docsight/wiki/Filing-a-Complaint)** | Editable ISP letter + downloadable technical PDF |
+| **Channel Timeline** | Per-channel power, SNR, error, and modulation history over time |
 | **[Home Assistant](https://github.com/itsDNNS/docsight/wiki/Home-Assistant)** | MQTT Auto-Discovery with per-channel sensors |
 | **[BQM Integration](https://github.com/itsDNNS/docsight/wiki/Features-BQM)** | ThinkBroadband broadband quality graphs |
 | **[LLM Export](https://github.com/itsDNNS/docsight/wiki/Features-LLM-Export)** | Structured reports for AI analysis |

app/changelog.json

@@ -1,4 +1,26 @@
 [
+  {
+    "version": "v2026-02-13.2",
+    "date": "2026-02-13",
+    "highlights": [
+      {
+        "icon": "📡",
+        "text": "New: Per-Channel Timeline — view power, SNR, errors, and modulation history for individual channels"
+      },
+      {
+        "icon": "🎯",
+        "text": "New: Modulation change timeline with upgrade/downgrade indicators"
+      },
+      {
+        "icon": "🔧",
+        "text": "Improved: US channels show power chart only (no empty error chart)"
+      },
+      {
+        "icon": "🎨",
+        "text": "Updated sidebar icons for Signal Trends and Channel Timeline"
+      }
+    ]
+  },
   {
     "version": "v2026-02-13.1",
     "date": "2026-02-13",

app/templates/index.html

@@ -811,7 +811,7 @@
             <span class="icon">&#128200;</span> {{ t.signal_trends }}
         </a>
         <a class="sidebar-link" data-view="channels">
-            <span class="icon">&#128225;</span> {{ t.channel_timeline }}
+            <span class="icon">&#128336;</span> {{ t.channel_timeline }}
         </a>
         <div class="sidebar-section-label">{{ t.sidebar_external }}</div>
         {% if speedtest_configured %}