ci: fix unused import + cargo fmt drift from #27

The #27 per-mode context budget commit (1be18e69) replaced calls to
compaction_threshold_for_model with compaction_threshold_for_model_and_effort
but left the old name in the import list, which fails under -Dwarnings on
Build, Test, and the npm wrapper smoke job. Also re-runs cargo fmt over
the four files the lint job flagged.

crates/tui/src/core/engine.rs

@@ -2895,8 +2895,8 @@ impl Engine {
             // assistant message in the conversation history. Saving a
             // placeholder here keeps the on-disk session structurally
             // correct so subsequent requests won't 400.
-            let needs_thinking_block = !tool_uses.is_empty()
-                || tool_parser::has_tool_call_markers(&current_text_raw);
+            let needs_thinking_block =
+                !tool_uses.is_empty() || tool_parser::has_tool_call_markers(&current_text_raw);
             let thinking_to_persist = if !current_thinking.is_empty() {
                 Some(current_thinking.clone())
             } else if needs_thinking_block {

crates/tui/src/models.rs

@@ -297,7 +297,8 @@ pub fn compaction_threshold_for_model_and_effort(
     reasoning_effort: Option<&str>,
 ) -> usize {
     let lower = model.to_lowercase();
-    if !lower.contains("deepseek") || !(lower.contains("v4") || is_current_deepseek_v4_alias(&lower))
+    if !lower.contains("deepseek")
+        || !(lower.contains("v4") || is_current_deepseek_v4_alias(&lower))
     {
         return compaction_threshold_for_model(model);
     }

crates/tui/src/tui/app.rs

@@ -13,7 +13,7 @@ use crate::config::{ApiProvider, Config, has_api_key, save_api_key};
 use crate::core::coherence::CoherenceState;
 use crate::hooks::{HookContext, HookEvent, HookExecutor, HookResult};
 use crate::models::{
-    Message, SystemPrompt, compaction_message_threshold_for_model, compaction_threshold_for_model,
+    Message, SystemPrompt, compaction_message_threshold_for_model,
     compaction_threshold_for_model_and_effort,
 };
 use crate::palette::{self, UiTheme};
@@ -623,10 +623,8 @@ impl App {
         let max_input_history = settings.max_input_history;
         let ui_theme = palette::ui_theme(&settings.theme);
         let model = settings.default_model.clone().unwrap_or(model);
-        let compact_threshold = compaction_threshold_for_model_and_effort(
-            &model,
-            config.reasoning_effort(),
-        );
+        let compact_threshold =
+            compaction_threshold_for_model_and_effort(&model, config.reasoning_effort());
 
         // Start in YOLO mode if --yolo flag was passed
         let preferred_mode = AppMode::from_setting(&settings.default_mode);

crates/tui/src/tui/ui/tests.rs

@@ -445,7 +445,10 @@ fn footer_auxiliary_spans_show_cache_and_cost_when_roomy() {
     let roomy = spans_text(&footer_auxiliary_spans(&app, 32));
     assert!(roomy.contains("cache 75%"));
     assert!(roomy.contains("$12.34"));
-    assert!(!roomy.contains("ctx"), "context % removed from footer — shown in header only");
+    assert!(
+        !roomy.contains("ctx"),
+        "context % removed from footer — shown in header only"
+    );
 }
 
 #[test]