fix(doctor): display user-configured variant in model resolution output

OmoConfig interface was missing variant property, causing doctor to show
variants from ModelRequirement fallback chain instead of user's config.

- Add variant to OmoConfig agent/category entries
- Add userVariant to resolution info interfaces
- Update getEffectiveVariant to prioritize user variant
- Add tests verifying variant capture

src/cli/doctor/checks/model-resolution.test.ts

@@ -90,6 +90,46 @@ describe("model-resolution check", () => {
       expect(sisyphus!.effectiveResolution).toContain("Provider fallback:")
       expect(sisyphus!.effectiveResolution).toContain("anthropic")
     })
+
+    it("captures user variant for agent when configured", async () => {
+      const { getModelResolutionInfoWithOverrides } = await import("./model-resolution")
+
+      //#given User has model with variant override for oracle agent
+      const mockConfig = {
+        agents: {
+          oracle: { model: "openai/gpt-5.2", variant: "xhigh" },
+        },
+      }
+
+      //#when getting resolution info with config
+      const info = getModelResolutionInfoWithOverrides(mockConfig)
+
+      //#then Oracle should have userVariant set
+      const oracle = info.agents.find((a) => a.name === "oracle")
+      expect(oracle).toBeDefined()
+      expect(oracle!.userOverride).toBe("openai/gpt-5.2")
+      expect(oracle!.userVariant).toBe("xhigh")
+    })
+
+    it("captures user variant for category when configured", async () => {
+      const { getModelResolutionInfoWithOverrides } = await import("./model-resolution")
+
+      //#given User has model with variant override for visual-engineering category
+      const mockConfig = {
+        categories: {
+          "visual-engineering": { model: "google/gemini-3-flash-preview", variant: "high" },
+        },
+      }
+
+      //#when getting resolution info with config
+      const info = getModelResolutionInfoWithOverrides(mockConfig)
+
+      //#then visual-engineering should have userVariant set
+      const visual = info.categories.find((c) => c.name === "visual-engineering")
+      expect(visual).toBeDefined()
+      expect(visual!.userOverride).toBe("google/gemini-3-flash-preview")
+      expect(visual!.userVariant).toBe("high")
+    })
   })
 
   describe("checkModelResolution", () => {

src/cli/doctor/checks/model-resolution.ts

@@ -51,6 +51,7 @@ export interface AgentResolutionInfo {
   name: string
   requirement: ModelRequirement
   userOverride?: string
+  userVariant?: string
   effectiveModel: string
   effectiveResolution: string
 }
@@ -59,6 +60,7 @@ export interface CategoryResolutionInfo {
   name: string
   requirement: ModelRequirement
   userOverride?: string
+  userVariant?: string
   effectiveModel: string
   effectiveResolution: string
 }
@@ -152,10 +154,12 @@ export function getModelResolutionInfoWithOverrides(config: OmoConfig): ModelRes
   const agents: AgentResolutionInfo[] = Object.entries(AGENT_MODEL_REQUIREMENTS).map(
     ([name, requirement]) => {
       const userOverride = config.agents?.[name]?.model
+      const userVariant = config.agents?.[name]?.variant
       return {
         name,
         requirement,
         userOverride,
+        userVariant,
         effectiveModel: getEffectiveModel(requirement, userOverride),
         effectiveResolution: buildEffectiveResolution(requirement, userOverride),
       }
@@ -165,10 +169,12 @@ export function getModelResolutionInfoWithOverrides(config: OmoConfig): ModelRes
   const categories: CategoryResolutionInfo[] = Object.entries(CATEGORY_MODEL_REQUIREMENTS).map(
     ([name, requirement]) => {
       const userOverride = config.categories?.[name]?.model
+      const userVariant = config.categories?.[name]?.variant
       return {
         name,
         requirement,
         userOverride,
+        userVariant,
         effectiveModel: getEffectiveModel(requirement, userOverride),
         effectiveResolution: buildEffectiveResolution(requirement, userOverride),
       }