feat: add Google code retrieval across desktop CLI and MCP

crates/searchi-core/src/extraction.rs

@@ -33,27 +33,30 @@ pub(crate) fn extract(path: &Path) -> Result<Option<Vec<Passage>>> {
             docx(&bytes).map(Some)
         };
     }
-    if !matches!(
-        extension.as_str(),
-        "txt"
-            | "md"
-            | "rs"
-            | "py"
-            | "js"
-            | "ts"
-            | "tsx"
-            | "jsx"
-            | "json"
-            | "toml"
-            | "yaml"
-            | "yml"
-            | "csv"
-            | "html"
-            | "css"
-            | "xml"
-            | "log"
-            | "sh"
-    ) {
+    let code = crate::is_code_path(path);
+    if !code
+        && !matches!(
+            extension.as_str(),
+            "txt"
+                | "md"
+                | "rs"
+                | "py"
+                | "js"
+                | "ts"
+                | "tsx"
+                | "jsx"
+                | "json"
+                | "toml"
+                | "yaml"
+                | "yml"
+                | "csv"
+                | "html"
+                | "css"
+                | "xml"
+                | "log"
+                | "sh"
+        )
+    {
         return Ok(None);
     }
     let file = File::open(path)?;
@@ -69,6 +72,26 @@ pub(crate) fn extract(path: &Path) -> Result<Option<Vec<Passage>>> {
         return Ok(None);
     };
     let lines = text.split_inclusive('\n').collect::<Vec<_>>();
+    if code {
+        let mut passages = Vec::new();
+        for start in (0..lines.len()).step_by(96) {
+            if passages.len() >= MAX_PASSAGES {
+                return Ok(None);
+            }
+            let end = (start + 128).min(lines.len());
+            passages.push(Passage {
+                text: lines[start..end].concat(),
+                source: SourceLocation {
+                    kind: "line".into(),
+                    number: (start + 1) as u32,
+                },
+            });
+            if end == lines.len() {
+                break;
+            }
+        }
+        return Ok(Some(passages));
+    }
     Ok(Some(
         lines
             .chunks(64)