feat: add claude-opus-4-7 model and update all model costs

Adds Claude Opus 4.7 to the model picker as the new most capable model.
Reorganises model list to reflect current vs previous generation, and
marks Sonnet 4 and Opus 4 as deprecated (retiring June 15, 2026).

Also corrects claude-opus-4-6 context window from 200K to 1M tokens,
and updates pricing comments to reflect May 2026 source date.

Closes #268

src-tauri/src/stats.rs

@@ -86,9 +86,10 @@ impl ContextWarning {
 /// Get the context window limit (in tokens) for a given model
 fn get_context_window_limit(model: &str) -> u64 {
     match model {
-        // Claude 4.6 family
+        // Claude 4.7 - 1M token context window
-        "claude-opus-4-6" => 200_000,
+        "claude-opus-4-7" => 1_000_000,
-        "claude-sonnet-4-6" => 1_000_000, // 1M token context window
+        // Claude 4.6 family - 1M token context window
+        "claude-opus-4-6" | "claude-sonnet-4-6" => 1_000_000,
         // Claude 4.5 family - 200K standard context
         "claude-opus-4-5-20251101"
         | "claude-sonnet-4-5-20250929"
@@ -490,7 +491,7 @@ fn is_consecutive_day(prev_date: &str, current_date: &str) -> bool {
     }
 }
 
-// Pricing as of February 2026
+// Pricing as of May 2026
 // https://platform.claude.com/docs/en/about-claude/models/overview
 // Cache pricing: https://platform.claude.com/docs/en/build-with-claude/prompt-caching
 pub fn calculate_cost(
@@ -501,14 +502,17 @@ pub fn calculate_cost(
     cache_read_tokens: Option<u64>,
 ) -> f64 {
     let (input_price_per_million, output_price_per_million) = match model {
-        // Current generation (Claude 4.6)
+        // Current generation (Claude 4.7/4.6/4.5)
-        "claude-opus-4-6" => (5.0, 25.0),
+        "claude-opus-4-7" => (5.0, 25.0),
         "claude-sonnet-4-6" => (3.0, 15.0),
+        "claude-haiku-4-5-20251001" => (1.0, 5.0),
+
+        // Previous generation (Claude 4.6)
+        "claude-opus-4-6" => (5.0, 25.0),
 
         // Previous generation (Claude 4.5)
         "claude-opus-4-5-20251101" => (5.0, 25.0),
         "claude-sonnet-4-5-20250929" => (3.0, 15.0),
-        "claude-haiku-4-5-20251001" => (1.0, 5.0),
 
         // Previous generation (Claude 4.x)
         "claude-opus-4-1-20250805" => (15.0, 75.0),
@@ -681,6 +685,15 @@ mod tests {
         assert!((cost - 0.165).abs() < 0.0001);
     }
 
+    #[test]
+    fn test_cost_calculation_opus_47() {
+        let cost = calculate_cost(1000, 2000, "claude-opus-4-7", None, None);
+        // Opus 4.7 pricing: $5/MTok input, $25/MTok output
+        // 1000 input tokens = $0.005, 2000 output tokens = $0.05
+        // Total = $0.055
+        assert!((cost - 0.055).abs() < 0.0001);
+    }
+
     #[test]
     fn test_cost_calculation_opus_45() {
         let cost = calculate_cost(1000, 2000, "claude-opus-4-5-20251101", None, None);
@@ -1019,6 +1032,16 @@ mod tests {
     // Context Window Tracking tests
     // =====================
 
+    #[test]
+    fn test_context_window_limit_opus_47() {
+        assert_eq!(get_context_window_limit("claude-opus-4-7"), 1_000_000);
+    }
+
+    #[test]
+    fn test_context_window_limit_opus_46() {
+        assert_eq!(get_context_window_limit("claude-opus-4-6"), 1_000_000);
+    }
+
     #[test]
     fn test_context_window_limit_claude_4() {
         assert_eq!(get_context_window_limit("claude-opus-4-5-20251101"), 200_000);

src/lib/components/ConfigSidebar.svelte

@@ -144,17 +144,20 @@
 
   const availableModels = [
     { value: "", label: "Default (from ~/.claude)" },
-    // Current generation (Claude 4.6)
+    // Current generation (Claude 4.7/4.6/4.5)
-    { value: "claude-opus-4-6", label: "Claude Opus 4.6 (Most Capable)" },
+    { value: "claude-opus-4-7", label: "Claude Opus 4.7 (Most Capable)" },
     { value: "claude-sonnet-4-6", label: "Claude Sonnet 4.6 (Recommended)" },
+    { value: "claude-haiku-4-5-20251001", label: "Claude Haiku 4.5 (Fast & Cheap)" },
+    // Previous generation (Claude 4.6)
+    { value: "claude-opus-4-6", label: "Claude Opus 4.6" },
     // Previous generation (Claude 4.5)
     { value: "claude-sonnet-4-5-20250929", label: "Claude Sonnet 4.5" },
-    { value: "claude-haiku-4-5-20251001", label: "Claude Haiku 4.5 (Fast & Cheap)" },
     { value: "claude-opus-4-5-20251101", label: "Claude Opus 4.5" },
     // Previous generation (Claude 4.x)
     { value: "claude-opus-4-1-20250805", label: "Claude Opus 4.1" },
-    { value: "claude-sonnet-4-20250514", label: "Claude Sonnet 4" },
+    // Deprecated — retire June 15, 2026
-    { value: "claude-opus-4-20250514", label: "Claude Opus 4" },
+    { value: "claude-sonnet-4-20250514", label: "Claude Sonnet 4 (Deprecated)" },
+    { value: "claude-opus-4-20250514", label: "Claude Opus 4 (Deprecated)" },
   ];
 
   const commonTools = [

src/lib/stores/stats.ts

@@ -10,13 +10,15 @@ export type BudgetType = "token" | "cost";
 // Model pricing (per million tokens) - keep in sync with stats.rs
 // Source: https://platform.claude.com/docs/en/about-claude/models/overview
 export const MODEL_PRICING: Record<string, { input: number; output: number }> = {
-  // Current generation (Claude 4.6)
+  // Current generation (Claude 4.7/4.6/4.5)
-  "claude-opus-4-6": { input: 5.0, output: 25.0 },
+  "claude-opus-4-7": { input: 5.0, output: 25.0 },
   "claude-sonnet-4-6": { input: 3.0, output: 15.0 },
+  "claude-haiku-4-5-20251001": { input: 1.0, output: 5.0 },
+  // Previous generation (Claude 4.6)
+  "claude-opus-4-6": { input: 5.0, output: 25.0 },
   // Previous generation (Claude 4.5)
   "claude-opus-4-5-20251101": { input: 5.0, output: 25.0 },
   "claude-sonnet-4-5-20250929": { input: 3.0, output: 15.0 },
-  "claude-haiku-4-5-20251001": { input: 1.0, output: 5.0 },
   // Previous generation (Claude 4.x)
   "claude-opus-4-1-20250805": { input: 15.0, output: 75.0 },
   "claude-opus-4-20250514": { input: 15.0, output: 75.0 },