chore: release v0.9.0 — clippy fixes and version bump

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: alankyshum

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "semantic-diff"
-version = "0.8.0"
+version = "0.9.0"
 edition = "2021"
 description = "A terminal diff viewer with AI-powered semantic grouping (Claude CLI / Copilot)"
 license = "MIT"

Cargo.toml

@@ -231,19 +231,6 @@ async fn request_incremental(
     Ok(validated_groups)
 }
 
-/// Invoke the detected LLM backend with a raw prompt and return the text response.
-/// Uses JSON output format (for structured responses like grouping).
-pub async fn invoke_llm(
-    backend: LlmBackend,
-    model: &str,
-    prompt: &str,
-) -> anyhow::Result<String> {
-    match backend {
-        LlmBackend::Claude => invoke_claude(prompt, model).await,
-        LlmBackend::Copilot => invoke_copilot(prompt, model).await,
-    }
-}
-
 /// Invoke the LLM backend with text output format (for free-form markdown responses).
 /// For Claude, uses `--output-format text` instead of JSON to avoid the wrapper.
 pub async fn invoke_llm_text(

src/grouper/llm.rs

@@ -502,16 +502,14 @@ fn render_table(rows: &[Vec<String>], pane_width: u16) -> Vec<Line<'static>> {
 
         // Separator after each row (except the last, which gets the bottom border)
         if ri < rows.len() - 1 {
-            let joiner = if is_header { "┼" } else { "┼" };
             let dash = if is_header { "─" } else { "┄" };
-            let (left, right) = if is_header { ("├", "┤") } else { ("├", "┤") };
             let sep: String = col_widths
                 .iter()
                 .map(|w| dash.repeat(w + 2))
                 .collect::<Vec<_>>()
-                .join(joiner);
+                .join("┼");
             lines.push(Line::from(Span::styled(
-                format!("  {left}{sep}{right}"),
+                format!("  ├{sep}┤"),
                 border_style,
             )));
         }

src/preview/markdown.rs

@@ -70,10 +70,7 @@ fn build_section_prompt(section: ReviewSection, shared_context: &str, review_sou
         ReviewSection::Verdict => {
             let skill_preamble = match review_source {
                 ReviewSource::Skill { path, .. } => {
-                    match std::fs::read_to_string(path) {
-                        Ok(content) => content,
-                        Err(_) => String::new(),
-                    }
+                    std::fs::read_to_string(path).unwrap_or_default()
                 }
                 ReviewSource::BuiltIn => String::new(),
             };

src/review/llm.rs

@@ -68,6 +68,12 @@ pub struct ReviewCache {
     order: VecDeque<u64>,
 }
 
+impl Default for ReviewCache {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl ReviewCache {
     pub fn new() -> Self {
         Self {