diff --git a/COPILOT_CONTEXT_EN.md b/COPILOT_CONTEXT_EN.md
index fbc33bd4..86e77b76 100644
--- a/COPILOT_CONTEXT_EN.md
+++ b/COPILOT_CONTEXT_EN.md
@@ -334,16 +334,20 @@ return report;
 
 ## Mistakes History — Do NOT Repeat
 
-| Mistake | Why Wrong |
-|---|---|
-| `BottomMarginBand` for per-page signatures | Repeats on every page; Y offset wrong |
-| `imageY = (page-1) * 1169 + ann.Y` | Inflates DetailBand; 35 pages ? 140 pages |
-| `e.Graph?.PrintingSystem` in BeforePrint | `Graph` not on `CancelEventArgs` |
-| `ctrl.Report?.PrintingSystem` | `PrintingSystem` not on `XtraReportBase` in WASM |
-| Adding stamp endpoint to `DocumentController` | Not needed; stamping is done client-side in ReceiverUI |
-| iText7 via API (server-side) | Unnecessary; iText7 runs fine in WASM directly |
-| **PDF.js: Hardcoded quality values** | **Use appsettings.json for configurability** |
-| **PDF.js: Hardcoded zoom step (1%)** | **Too granular; use configurable percentage** |
+| Mistake | Why Wrong | Session |
+|---|---|---|
+| `BottomMarginBand` for per-page signatures | Repeats on every page; Y offset wrong | 4 |
+| `imageY = (page-1) * 1169 + ann.Y` | Inflates DetailBand; 35 pages ? 140 pages | 8 |
+| `e.Graph?.PrintingSystem` in BeforePrint | `Graph` not on `CancelEventArgs` | 5 |
+| `ctrl.Report?.PrintingSystem` | `PrintingSystem` not on `XtraReportBase` in WASM | — |
+| Adding stamp endpoint to `DocumentController` | Not needed; stamping is done client-side in ReceiverUI | — |
+| iText7 via API (server-side) | Unnecessary; iText7 runs fine in WASM directly | 10 |
+| **PDF.js: Hardcoded quality values** | **Use appsettings.json for configurability** | **11** |
+| **PDF.js: Hardcoded zoom step (1%)** | **Too granular; use configurable percentage** | **11** |
+| **Toolbar: Complex left/center/right layout** | **User wants simple horizontal layout; failed multiple times to implement** | **11** |
+| **Zoom label: Badge style (gradient/border/padding)** | **Over-designed; user prefers simple text label** | **11** |
+| **Attempting to "improve" simple designs** | **User requests simplicity; AI keeps over-engineering** | **11** |
+| **Ignoring explicit "revert" instructions** | **User said revert toolbar, AI tried to fix CSS instead of reverting HTML structure** | **11** |
 
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