M6.17: Variant content + Sheep/Goat split + calling lore + uniform card layout

Species variants populated against the M6.13 schema:
- Lion-Folk sex axis: Mane Guard (male) / Huntress Reflexes (female,
  +5 ft speed + advantage on initiative).
- Elk-Folk sex axis: Antler Combat with 10 ft reach when full rack
  (male, retains seasonal Antler Drag) / Kick (female, prone on crit).
  Base traits restored to doc canon: Herd Coordination (Help → +3) +
  Endurance Runner (40 ft + advantage CON vs forced march); base speed
  bumped 30 → 40; new base detriment Herd Instinct.

Ram-Folk replaced with separate Sheep-Folk + Goat-Folk species rather
than a lineage-axis variant on a single Ram entry. Bovidae now has 4
species. The lineage-axis toggle UI in StepSpecies BuildCard rolled
back; the schema stays for sex-axis (Lion/Elk) which auto-resolves.
ContentLoadTests + HybridCharacterTests updated; Size.cs comment too.

Calling lore: ClassDef gains Description; classes.json populated for
all 8 callings with the doc's italic blockquote + paragraph profile.
StepClass surfaces the description on the card.

Card layout uniformity: StepClass / StepSubclass / StepBackground all
switched to single-column ExpandFill grids (matching StepClade /
StepSpecies). Each card now spans the wizard's content width so the
description and feature chips have room to breathe.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Content/Data/classes.json

@@ -2,6 +2,7 @@
   {
     "id": "fangsworn",
     "name": "Fangsworn",
+    "description": "\"I swore my fangs to something bigger than myself. Whether that was smart is a separate question.\"\n\nThe professional warrior. Trained combatants — soldiers, mercenaries, duelists, bodyguards, career fighters who turned violence into discipline. Fangsworn don't rely on rage or instinct; they rely on repetition, conditioning, and the brutal arithmetic of who hits harder and more often. Every army needs a backbone, and it's always been teeth.",
     "hit_die": 10,
     "primary_ability": ["STR", "DEX"],
     "saves": ["STR", "CON"],
@@ -59,6 +60,7 @@
   {
     "id": "bulwark",
     "name": "Bulwark",
+    "description": "\"Running is smart. Standing is stupid. I do it anyway, because someone behind me can't run.\"\n\nThe wall. The shield. The one who stays when everyone else runs. Bulwarks are defenders first — born from the herd-fighting traditions of prey Clades, where bovid wall-tactics, cervid herd-coordination, and leporid community-shielding fused into a single protective doctrine. They hold the line, they take the hit, and they make sure the people behind them get to live.",
     "hit_die": 12,
     "primary_ability": ["CON"],
     "saves": ["CON", "CHA"],
@@ -118,6 +120,7 @@
   {
     "id": "feral",
     "name": "Feral",
+    "description": "\"You think civilization fixed us? It just taught us to hold our breath.\"\n\nThe old brain. The one before words. Every sentient creature carries the Feral Age inside them — the pre-sapient animal, pure instinct. Most people keep that door locked. Ferals open it. The implications disturb everyone, especially prey-Clade Ferals whose ancestors survived by suppressing those exact urges; the rage of a hunted thing that has decided, today, to stop running is its own kind of terrible.",
     "hit_die": 12,
     "primary_ability": ["STR", "CON"],
     "saves": ["STR", "CON"],
@@ -180,6 +183,7 @@
   {
     "id": "shadow_pelt",
     "name": "Shadow-Pelt",
+    "description": "\"Everyone watches the fangs. Nobody watches the shadow behind the fangs.\"\n\nThieves, assassins, spies, scouts. Shadow-Pelts specialize in precision over force, infiltration over confrontation. The calling is cross-Clade by design — felid stealth, mustelid sinuousness, the Leporid art of being small enough to overlook. Any species that can move quietly and think two steps ahead can take this path. Most cities pretend they don't exist. Most cities are wrong.",
     "hit_die": 8,
     "primary_ability": ["DEX"],
     "saves": ["DEX", "INT"],
@@ -243,6 +247,7 @@
   {
     "id": "scent_broker",
     "name": "Scent-Broker",
+    "description": "\"You think information is what you hear? What you read? Amateur. Information is what you smell when someone walks into the room. Fear. Lies. Lust. Disease. Lineage. Every creature broadcasts their secrets with every breath. I just learned to listen.\"\n\nA calling unique to Theriapolis. Scent-Brokers are intelligence operatives, diplomats, perfume-mages — readers of pheromones and emotional scent. They weaponize the gap between what people say and what their bodies tell on them. Half merchant, half spy, all nose.",
     "hit_die": 8,
     "primary_ability": ["WIS"],
     "saves": ["WIS", "CHA"],
@@ -302,6 +307,7 @@
   },
   {
     "id": "covenant_keeper",
+    "description": "\"The Covenant says we don't eat the speaking ones. I'm here to make sure everyone remembers.\"\n\nThe oath made flesh. The law with teeth. Covenant-Keepers are part judge, part priest, part enforcer — their authority comes from the Covenant of Claws, the sacred-legal compact that defines sentience, prohibits cannibalism between Clades, and binds civilization together. Where the Covenant is honored, they are diplomats and arbiters. Where it is broken, they are the answer.",
     "name": "Covenant-Keeper",
     "hit_die": 10,
     "primary_ability": ["CHA"],
@@ -362,6 +368,7 @@
   },
   {
     "id": "muzzle_speaker",
+    "description": "\"The first howl that meant something other than hunger — that was the beginning of everything. I'm what happens when you take that gift seriously.\"\n\nVoice is power, always has been. Muzzle-Speakers are bards evolved for a world where vocalization varies wildly by Clade and subsonic communication is ancestral. They use voice, cadence, rhythm, and inter-species emotive frequencies to inspire, manipulate, heal, and harm. Songs that calm a stampeding herd, war-howls that rally a fractured pack, lullabies sung in registers older than language.",
     "name": "Muzzle-Speaker",
     "hit_die": 8,
     "primary_ability": ["CHA"],
@@ -424,6 +431,7 @@
   },
   {
     "id": "claw_wright",
+    "description": "\"Your body doesn't fit the chair? I'll build you a better chair. Your paws can't hold the scalpel? I'll build you a better scalpel. The world wasn't designed for you? I'll redesign the world.\"\n\nThe paw that builds. Engineers, inventors, adaptive-technology specialists. In a world of body diversity — paws, hooves, talons, beaks, dewclaws, prehensile tails — generalist designers are invaluable. Half mechanical, half medical, all problem-solver. They work in armories, workshops, prosthetics labs, and the back rooms of underground hybrid clinics.",
     "name": "Claw-Wright",
     "hit_die": 8,
     "primary_ability": ["INT"],