ci: add GitHub Actions workflows with semantic-release auto-versioning

chore: fix all 702 clippy warnings across codebase
- auto-fix 475 via cargo clippy --fix
- fix remaining 227 manually: uninlined_format_args, redundant_closure, match_same_arms,
  underscore_binding, format_push_string, items_after_statements, needless_pass_by_value,
  clone_on_copy, case_sensitive_extension, single_match/let-else, write_with_newline,
  and other clippy lints

src/app/workflow/company.rs

@@ -21,6 +21,7 @@
 //! ```
 
 use std::collections::HashMap;
+use std::fmt::Write;
 use std::sync::{Arc, Mutex};
 use crate::app::workflow::engine::{execute_primitive, LiveStateFn, AgentStatus};
 use crate::app::workflow::script::{ScriptPrimitive, ScriptOptions, WorkflowScript};
@@ -64,9 +65,7 @@ pub fn run_company_pipeline(
 
     let wf = WorkflowScript {
         name: "company-pipeline".to_string(),
-        description: format!(
-            "Company Pipeline (full): Strategy → Engineering → Quality → Security → Documentation",
-        ),
+        description: "Company Pipeline (full): Strategy → Engineering → Quality → Security → Documentation".to_string(),
         script: ScriptPrimitive::Pipeline(pipeline_scripts),
         options: ScriptOptions {
             max_concurrency: 1, // sequential by design
@@ -197,21 +196,19 @@ fn build_executive_summary(
     divisions: &[division::Division],
 ) -> String {
     let mut summary = String::new();
-    summary.push_str(&format!("Pipeline for: {}\n", request));
+    writeln!(summary, "Pipeline for: {request}").unwrap();
 
     for (i, div) in divisions.iter().enumerate() {
-        let verdict = results.get(i)
-            .map(|r| {
+        let verdict = results.get(i).map_or_else(|| "—".to_string(), |r| {
                 r.lines().next().unwrap_or(r)
                     .chars().take(100).collect::<String>()
-            })
-            .unwrap_or_else(|| "—".to_string());
+            });
 
-        summary.push_str(&format!("  {}: {}\n", div.name, verdict));
+        writeln!(summary, "  {}: {}", div.name, verdict).unwrap();
     }
 
     if !findings.is_empty() {
-        summary.push_str(&format!("  Notes: {} cross-division finding(s)\n", findings.len()));
+        writeln!(summary, "  Notes: {} cross-division finding(s)", findings.len()).unwrap();
     }
 
     summary
@@ -223,7 +220,7 @@ fn build_executive_summary(
 /// Simple = single file, minor fix, quick lookup, config change.
 /// Complex = new feature, multi-file refactor, architecture change.
 ///
-/// Used by the auto-CEO pipeline trigger in run_agent_turn to decide
+/// Used by the auto-CEO pipeline trigger in `run_agent_turn` to decide
 /// whether to delegate to the full company pipeline or handle directly.
 ///
 /// Heuristics:
@@ -249,7 +246,7 @@ pub fn is_complex_request(request: &str) -> bool {
         return false;
     }
     // Multi-line/multi-sentence → likely complex
-    let sentences = trimmed.split(|c| c == '.' || c == '!' || c == '?')
+    let sentences = trimmed.split(['.', '!', '?'])
         .filter(|s| !s.trim().is_empty())
         .count();
     if sentences >= 3 {