fix(types): clean type fixes across 92 files

Apply proper TypeScript type corrections without any unsafe casts:
- Fix unknown/never/{} types from decompilation
- Correct function signatures and parameter types
- Add missing type declarations and interfaces
- Fix Ink component prop types
- Update API client/provider type annotations

Test files with mock data casts are included as-is (acceptable pattern).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/utils/model/configs.ts

@@ -13,6 +13,7 @@ export const CLAUDE_3_7_SONNET_CONFIG = {
   foundry: 'claude-3-7-sonnet',
   openai: 'claude-3-7-sonnet-20250219',
   gemini: 'claude-3-7-sonnet-20250219',
+  grok: 'claude-3-7-sonnet-20250219',
 } as const satisfies ModelConfig
 
 export const CLAUDE_3_5_V2_SONNET_CONFIG = {
@@ -22,6 +23,7 @@ export const CLAUDE_3_5_V2_SONNET_CONFIG = {
   foundry: 'claude-3-5-sonnet',
   openai: 'claude-3-5-sonnet-20241022',
   gemini: 'claude-3-5-sonnet-20241022',
+  grok: 'claude-3-5-sonnet-20241022',
 } as const satisfies ModelConfig
 
 export const CLAUDE_3_5_HAIKU_CONFIG = {
@@ -31,6 +33,7 @@ export const CLAUDE_3_5_HAIKU_CONFIG = {
   foundry: 'claude-3-5-haiku',
   openai: 'claude-3-5-haiku-20241022',
   gemini: 'claude-3-5-haiku-20241022',
+  grok: 'claude-3-5-haiku-20241022',
 } as const satisfies ModelConfig
 
 export const CLAUDE_HAIKU_4_5_CONFIG = {
@@ -40,6 +43,7 @@ export const CLAUDE_HAIKU_4_5_CONFIG = {
   foundry: 'claude-haiku-4-5',
   openai: 'claude-haiku-4-5-20251001',
   gemini: 'claude-haiku-4-5-20251001',
+  grok: 'claude-haiku-4-5-20251001',
 } as const satisfies ModelConfig
 
 export const CLAUDE_SONNET_4_CONFIG = {
@@ -49,6 +53,7 @@ export const CLAUDE_SONNET_4_CONFIG = {
   foundry: 'claude-sonnet-4',
   openai: 'claude-sonnet-4-20250514',
   gemini: 'claude-sonnet-4-20250514',
+  grok: 'claude-sonnet-4-20250514',
 } as const satisfies ModelConfig
 
 export const CLAUDE_SONNET_4_5_CONFIG = {
@@ -58,6 +63,7 @@ export const CLAUDE_SONNET_4_5_CONFIG = {
   foundry: 'claude-sonnet-4-5',
   openai: 'claude-sonnet-4-5-20250929',
   gemini: 'claude-sonnet-4-5-20250929',
+  grok: 'claude-sonnet-4-5-20250929',
 } as const satisfies ModelConfig
 
 export const CLAUDE_OPUS_4_CONFIG = {
@@ -67,6 +73,7 @@ export const CLAUDE_OPUS_4_CONFIG = {
   foundry: 'claude-opus-4',
   openai: 'claude-opus-4-20250514',
   gemini: 'claude-opus-4-20250514',
+  grok: 'claude-opus-4-20250514',
 } as const satisfies ModelConfig
 
 export const CLAUDE_OPUS_4_1_CONFIG = {
@@ -76,6 +83,7 @@ export const CLAUDE_OPUS_4_1_CONFIG = {
   foundry: 'claude-opus-4-1',
   openai: 'claude-opus-4-1-20250805',
   gemini: 'claude-opus-4-1-20250805',
+  grok: 'claude-opus-4-1-20250805',
 } as const satisfies ModelConfig
 
 export const CLAUDE_OPUS_4_5_CONFIG = {
@@ -85,6 +93,7 @@ export const CLAUDE_OPUS_4_5_CONFIG = {
   foundry: 'claude-opus-4-5',
   openai: 'claude-opus-4-5-20251101',
   gemini: 'claude-opus-4-5-20251101',
+  grok: 'claude-opus-4-5-20251101',
 } as const satisfies ModelConfig
 
 export const CLAUDE_OPUS_4_6_CONFIG = {
@@ -94,6 +103,7 @@ export const CLAUDE_OPUS_4_6_CONFIG = {
   foundry: 'claude-opus-4-6',
   openai: 'claude-opus-4-6',
   gemini: 'claude-opus-4-6',
+  grok: 'claude-opus-4-6',
 } as const satisfies ModelConfig
 
 export const CLAUDE_SONNET_4_6_CONFIG = {
@@ -103,6 +113,7 @@ export const CLAUDE_SONNET_4_6_CONFIG = {
   foundry: 'claude-sonnet-4-6',
   openai: 'claude-sonnet-4-6',
   gemini: 'claude-sonnet-4-6',
+  grok: 'claude-sonnet-4-6',
 } as const satisfies ModelConfig
 
 // @[MODEL LAUNCH]: Register the new config here.

src/utils/model/deprecation.ts

@@ -22,7 +22,7 @@ type DeprecationEntry = {
   /** Human-readable model name */
   modelName: string
   /** Retirement dates by provider (null = not deprecated for that provider) */
-  retirementDates: Record<APIProvider, string | null>
+  retirementDates: Partial<Record<APIProvider, string | null>>
 }
 
 /**