Add faction/interactability filtering to minimap icons

Filter hostile units, wrong-faction summoned NPCs, and non-interactable
game objects from minimap tracking. Dynamic checks (UnitReaction, owner
faction, GO_FLAG_NO_INTERACT) run every frame since group membership can
change. GUID cache still handles static classification (NPC flags/subname).

Also fix missing ECX clobber in outline UnitReaction inline asm.

src/minimapicons/addon/MinimapIcons.lua

@@ -9,13 +9,14 @@ MINIMAPICONS_VERSION = 3
 -- =============================================================================
 
 local SPELL_CATEGORIES = {
-    { name = "Hunter Tracking", spells = {
+    { name = UnitClass("player") .. " Tracking", spells = {
         "Track Beasts", "Track Humanoids", "Track Undead", "Track Hidden",
         "Track Elementals", "Track Demons", "Track Giants", "Track Dragonkin",
-    }},
-    { name = "Class Abilities", spells = {
         "Sense Undead", "Sense Demons",
     }},
+    -- { name = "Class Abilities", spells = {
+        -- "Sense Undead", "Sense Demons",
+    -- }},
     { name = "Professions", spells = {
         "Find Herbs", "Find Minerals", "Find Treasure",
     }},