fix: keep short txt and md chunks

Author: Helweg

native/src/parser.rs

@@ -682,7 +682,7 @@ fn chunk_by_lines(content: &str, language: &Language) -> Vec<CodeChunk> {
         let end = std::cmp::min(start + lines_per_chunk, total_lines);
         let sub_content: String = lines[start..end].join("\n");
 
-        if sub_content.len() >= MIN_CHUNK_SIZE {
+        if !sub_content.trim().is_empty() {
             chunks.push(CodeChunk {
                 content: sub_content,
                 start_line: start as u32 + 1,

tests/native.test.ts

@@ -66,10 +66,22 @@ const add = (a, b) => a + b;
       expect(chunks.length).toBeGreaterThanOrEqual(1);
     });
 
-    it("should return empty array for unparseable content", () => {
+    it("should chunk plain text files", () => {
       const chunks = parseFile("data.txt", "just plain text");
 
       expect(chunks).toBeInstanceOf(Array);
+      expect(chunks.length).toBeGreaterThanOrEqual(1);
+      expect(chunks[0]?.content).toContain("just plain text");
+      expect(chunks[0]?.chunkType).toBe("block");
+    });
+
+    it("should chunk markdown files", () => {
+      const content = "# Project KB\n\nProject knowledge base delta.";
+      const chunks = parseFile("README.md", content);
+
+      expect(chunks.length).toBeGreaterThanOrEqual(1);
+      expect(chunks[0]?.content).toContain("Project knowledge base delta");
+      expect(chunks[0]?.chunkType).toBe("block");
     });
 
     it("should parse PHP files", () => {