feat(catalog): wire up Icons collector (TOC + router); fix MysticScrollProbe nil crash

README.md

@@ -71,9 +71,12 @@ once per account; results persist across sessions and characters.
 ### Game-data catalog (for db.exil.es / talent-calc)
 
 ```
-/coae catalog all             One pass: dump skills + talents
+/coae catalog all             One pass: dump skills + talents + icons
 /coae catalog skills          Dump skills/dispels/passives only
 /coae catalog talents         Dump talent-tree nodes only
+/coae catalog icons           Dump server-resolved per-entry icons +
+                              per-(class, spec) sidebar tab icons via
+                              C_ClassInfo.GetSpecInfo (for db.exil.es)
 
 /coae catalog dispels [class] Print dispel summary (or for one class)
 /coae catalog passives [class]Print level-passive summary (or for one class)
@@ -117,7 +120,7 @@ SavedVariables
 | `CoaExporterSaved`        | `/coae export …` when sv = on | Latest character export, keyed by `realm:name` |
 | `CoaExporterConfig`       | `/coae sv on/off`             | Just `enableSavedVariables` for now |
 | `CoaExporterScrollCache`  | `/coae scrolls scan`          | Mystic scroll item tooltips |
-| `CoaExporterCatalog`      | `/coae catalog …`             | `skills`, `dispels`, `levelPassives`, `talents`, `_meta` |
+| `CoaExporterCatalog`      | `/coae catalog …`             | `skills`, `dispels`, `levelPassives`, `talents`, `iconByEntryId`, `specInfoByClassSpec`, `_meta` |
 
 Layout
 ------
@@ -137,7 +140,8 @@ CoaExporter/
 ├── Catalogs/                        (game-data dumps for the wiki/calc)
 │   ├── Common.lua                   (one entry-walk; fans out to collectors)
 │   ├── Skills.lua
-│   └── Talents.lua
+│   ├── Talents.lua
+│   └── Icons.lua                    (entry.Icon + C_ClassInfo.GetSpecInfo)
 ├── UI/ExportFrame.lua
 └── Core.lua                         (slash router)
 ```