Merge the ShaguTweaks Extras ClassicAPI modules into ShaguTweaks (3.7)

Bring in 27 module files from Dusk/ShaguTweaks-Extras-ClassicAPI
(8e14bb4): action bar, chat, loot, macro, merchant (Buy Em All),
minimap & world map, tooltip and unit frame modules, with their
textures. Titles are unchanged, so saved toggles carry over.

- Categories: Chat -> Chat & Social, World Map -> Minimap & World Map,
  Merchant & Auction -> Merchant; Macro is a new category.
- Texture paths point at ShaguTweaks\img.
- Not merged: Raid Frames, Bag Item Click and Bag Search Bar (Bagshui
  covers them), Auction Alt-Buy (aux covers it).
- Chat note when the old ShaguTweaks-extras addon is still enabled.
- English translation keys, notices, license copy, asset provenance,
  README, changelog and version 3.7.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019W3rwusM4i1CYaHQAYixJ7

mods/cursor-tooltip.lua

@@ -0,0 +1,99 @@
+-- Adapted from TokensWorth/ShaguTweaks-mods (MIT, original copyright GryllsAddons).
+
+local _G = ShaguTweaks.GetGlobalEnv()
+local T = ShaguTweaks.T
+local hooksecurefunc = ShaguTweaks.hooksecurefunc
+
+local module = ShaguTweaks:register({
+  title = T["Cursor Tooltip"],
+  description = T["Attaches default tooltips to the cursor."],
+  expansions = { ["vanilla"] = true, ["tbc"] = nil },
+  category = T["Tooltip & Items"],
+  enabled = nil,
+})
+
+module.enable = function(self)
+  if ShaguTweaks.CursorTooltipInstalled then return end
+  ShaguTweaks.CursorTooltipInstalled = true
+
+  -- Keep the native helper for non-GameTooltip callers. The feature only
+  -- needs to move the normal world/UI GameTooltip and should not unexpectedly
+  -- change other tooltip frames that may reuse the same helper.
+  local originalDefaultAnchor = ShaguTweaks.CursorTooltipOriginalDefaultAnchor
+    or _G.GameTooltip_SetDefaultAnchor
+
+  ShaguTweaks.CursorTooltipOriginalDefaultAnchor = originalDefaultAnchor
+
+  local cursor = CreateFrame("Frame", nil, UIParent)
+  cursor:SetWidth(1)
+  cursor:SetHeight(1)
+  cursor:Hide()
+
+  local following = false
+  local lastX, lastY, lastScale
+
+  local function UpdateCursor(force)
+    local scale = UIParent:GetEffectiveScale()
+    if not scale or scale == 0 then scale = UIParent:GetScale() end
+    if not scale or scale == 0 then scale = 1 end
+
+    local x, y = GetCursorPosition()
+
+    -- GetCursorPosition is cheap and required for following the pointer, but
+    -- avoid a frame-layout operation while the mouse is completely still.
+    if not force and x == lastX and y == lastY and scale == lastScale then
+      return
+    end
+
+    lastX, lastY, lastScale = x, y, scale
+
+    -- Reusing the same CENTER anchor updates it in place; ClearAllPoints every
+    -- rendered frame is unnecessary.
+    cursor:SetPoint("CENTER", UIParent, "BOTTOMLEFT", x / scale, y / scale)
+  end
+
+  cursor:SetScript("OnUpdate", function()
+    if not following or not GameTooltip:IsShown() then
+      this:Hide()
+      return
+    end
+
+    UpdateCursor(false)
+  end)
+
+  function _G.GameTooltip_SetDefaultAnchor(tooltip, parent)
+    if tooltip ~= GameTooltip then
+      return originalDefaultAnchor(tooltip, parent)
+    end
+
+    -- Cursor Tooltip intentionally uses ANCHOR_CURSOR without marking the
+    -- tooltip as a default anchored tooltip. This matches the upstream mod's
+    -- lifecycle and makes world-unit tooltips disappear immediately when the
+    -- mouseover unit is lost, while keeping the custom cursor positioning.
+    tooltip:SetOwner(parent or UIParent, "ANCHOR_CURSOR")
+    tooltip:ClearAllPoints()
+
+    -- Position once before Show() so there is no first-frame jump from the
+    -- cursor frame's default origin.
+    UpdateCursor(true)
+
+    tooltip:SetPoint("BOTTOMLEFT", cursor, "TOPRIGHT", 12, 12)
+    tooltip:SetClampedToScreen(true)
+
+    following = true
+  end
+
+  -- Default anchoring normally happens before GameTooltip:Show(). Start the
+  -- per-frame cursor tracker only once the tooltip is actually visible.
+  hooksecurefunc(GameTooltip, "Show", function()
+    if not following then return end
+
+    UpdateCursor(true)
+    cursor:Show()
+  end)
+
+  hooksecurefunc(GameTooltip, "Hide", function()
+    following = false
+    cursor:Hide()
+  end)
+end