SpellPowerCoefficients - Wow: Forever

Spell Power Coefficients (WIP) PLEASE LET ME KNOW IF YOU FIND ANYTHING WRONG

Built For WoW: Forever. Hover a spell to see how much your spell power adds to it. Hover over gear to see what it would change, per cast, for the spells you actually use.

 `/spc` or the SpC minimap button opens the options.
Spell tooltips

Two short lines by default Example: 
```
Greater Heal (Rank 5)
...
With spell power: 2278-2507  +312
0.857 x 364 bonus healing · Shift: details
```
The green +312 is what your spell power adds to the cast. The grey line shows the coefficient and your spell power. Hold Shift for the full breakdown: base values, per tick and per target, chain jumps, Penance bolts, Starfall stars, Consecration's first 4 enemies, seals, and totals for direct + over-time spells. You can also pick Always detailed in the options.
Heals and shields use your bonus healing. Damage uses your spell damage for that school (the highest one if the spell has several).
Spell power is read live, and the lines update if it changes while the tooltip is open (out of combat). In combat the last value the game let the addon read is used, with a note.

Optional (off by default): Average including crits. It uses your spell crit chance with crits at x1.5, assumes no crit talents, and doesn't count over-time parts.
Item comparison
```
SpC Item Comparison tool

Current item equipped (vs New item)
  Flash Heal  +13.7 heal
  Greater Heal  +27.4 heal
  Mind Blast  +1.7 dmg
  Healing +32, Spell damage +4
```
Spells: your most-cast spells on this character, then your action bars. You can also pin your own list: drag a spell from the spellbook onto the options window, Shift-click or middle-click it, or pick it from the list.

Compared with: the item the game's own comparison uses. Rings and trinkets use the weaker one by default (or the stronger one, or both). Two-handers are compared with main hand + off hand.

The math: stat change x coefficient x ticks, jumps, bolts, and the low-rank factor. School damage counts only where it beats your best school for that spell. The replaced item's enchant counts as lost unless you turn that off. Set bonuses aren't included.

Options
A normal window (`/spc`, the SpC minimap button, the minimap addon menu, or Settings > AddOns > Spell Power Coefficients). The game keeps running while it's open. It's movable, closes with Esc, and has a size setting (70-120%). It is laid out as: spell tooltip options, item comparison and general settings on the left; pinned spells and the spell picker in the middle; and on the right, Now comparing with a live preview. You can also require a modifier key (Shift/Ctrl/Alt) to show comparisons, switch to colorblind-friendly colors, and choose compact or detailed layouts.
`/spc help` lists the commands: `toggle`, `compare`, `pin <spell>`, `unpin <spell>`, `detailed`, `compact`, `minimap`, `mode auto|base|included`, `lowrank`, `details`, `rate`, `crit`, `status`, `reset`.

Things to know
Coefficients come from the WoW: Forever client data (build 1.60.1.70450), not from Classic. For example, ranks learned before level 20 get their full coefficient, and most DoTs and HoTs get 0.2 per tick.
Low ranks get less from spell power once you outlevel them. The addon uses the community estimate (5% less per level past 17 levels above the rank) and marks it as an estimate.
Auto-detect: the addon works out whether the game's tooltip numbers already include spell power. It re-checks per character after a patch or a week.

Not included: talents (except what the game already puts in the text, such as Chain Heal's falloff), buffs and % modifiers.

English clients get the full lines. On other languages the spell text isn't read, so you get one line with the coefficient and the spell power bonus.

Values marked `~` are estimates.

Install
Use the CurseForge app; it picks the right folder. To install by hand, unzip so the folder ends up at `World of Warcraft/_classic_beta_/Interface/AddOns/SpellPowerCoefficients` (the Forever beta).

Libraries
LibStub, CallbackHandler-1.0, LibDataBroker-1.1 and LibDBIcon-1.0 are included unmodified under `Libs/`. Each folder has its licence notice, and `Libs/LICENSES.txt` lists them all. LibDBIcon comes from its maintained source, repos.curseforge.com/wow/libdbicon-1-0.

Feedback

If a number is wrong or a spell is missing, leave a comment on this CurseForge page with the spell, its rank, your spell power, and what it actually hit for. A screenshot of the tooltip helps a lot.
MIT licensed (the addon's own code; the libraries keep their own licences).