fix: resolve all type checking and linting issues

- Fix type errors in refiners by properly handling async iterables
- Fix type errors in grep/vimgrep sources by using type assertions
- Remove unused imports and variables
- Fix async function without await in smart_grep renderer
- Ensure all code passes type checking and linting

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: lambdalisue

builtin/refiner/buffer_info.ts

@@ -1,4 +1,5 @@
 import * as fn from "@denops/std/function";
+import type { IdItem } from "@vim-fall/core/item";
 import { defineRefiner, type Refiner } from "../../refiner.ts";
 
 type Detail = {
@@ -84,7 +85,13 @@ export function bufferInfo(
   const minLines = options.minLines;
   const maxLines = options.maxLines;
 
-  return defineRefiner(async (denops, { items }) => {
+  return defineRefiner(async function* (denops, { items }) {
+    // Convert async iterable to array first
+    const itemsArray: IdItem<Detail>[] = [];
+    for await (const item of items) {
+      itemsArray.push(item);
+    }
+    
     // Get all buffer info at once for efficiency
     const allBufinfo = await fn.getbufinfo(denops);
     const bufInfoMap = new Map(
@@ -93,7 +100,7 @@ export function bufferInfo(
 
     // Process items and filter
     const results = await Promise.all(
-      items.map(async (item) => {
+      itemsArray.map(async (item) => {
         const { bufnr } = item.detail;
         const bufinfo = bufInfoMap.get(bufnr);
 
@@ -102,17 +109,17 @@ export function bufferInfo(
         }
 
         // Check modification status
-        if (modified !== undefined && bufinfo.changed !== (modified ? 1 : 0)) {
+        if (modified !== undefined && !!bufinfo.changed !== modified) {
           return null;
         }
 
         // Check listed status
-        if (listed !== undefined && bufinfo.listed !== (listed ? 1 : 0)) {
+        if (listed !== undefined && !!bufinfo.listed !== listed) {
           return null;
         }
 
         // Check loaded status
-        if (loaded !== undefined && bufinfo.loaded !== (loaded ? 1 : 0)) {
+        if (loaded !== undefined && !!bufinfo.loaded !== loaded) {
           return null;
         }
 
@@ -180,6 +187,7 @@ export function bufferInfo(
     );
 
     // Return only non-null items
-    return results.filter((item) => item !== null);
+    const filtered = results.filter((item): item is IdItem<Detail> => item !== null);
+    yield* filtered;
   });
 }

builtin/refiner/file_info.ts

@@ -1,3 +1,4 @@
+import type { IdItem } from "@vim-fall/core/item";
 import { defineRefiner, type Refiner } from "../../refiner.ts";
 import { extname } from "@std/path/extname";
 
@@ -85,15 +86,21 @@ export function fileInfo(
   const excludeHidden = options.excludeHidden ?? false;
   const excludePatterns = options.excludePatterns ?? [];
 
-  return defineRefiner(async (_denops, { items }) => {
+  return defineRefiner(async function* (_denops, { items }) {
+    // Convert async iterable to array first
+    const itemsArray: IdItem<Detail>[] = [];
+    for await (const item of items) {
+      itemsArray.push(item);
+    }
+    
     // Process items in parallel and filter
     const results = await Promise.all(
-      items.map(async (item) => {
+      itemsArray.map(async (item) => {
         const { path } = item.detail;
 
         // Check if hidden file should be excluded
         if (
-          excludeHidden && path.split("/").some((part) => part.startsWith("."))
+          excludeHidden && path.split("/").some((part: string) => part.startsWith("."))
         ) {
           return null;
         }
@@ -173,6 +180,7 @@ export function fileInfo(
     );
 
     // Return only non-null items
-    return results.filter((item) => item !== null);
+    const filtered = results.filter((item): item is IdItem<Detail> => item !== null);
+    yield* filtered;
   });
 }

builtin/renderer/smart_grep.ts

@@ -1,6 +1,5 @@
 import { defineRenderer, type Renderer } from "../../renderer.ts";
 import { dirname } from "@std/path/dirname";
-import { basename } from "@std/path/basename";
 
 type Detail = {
   /**
@@ -82,7 +81,7 @@ export function smartGrep(
   const colorize = options.colorize ?? false;
   const alignColumns = options.alignColumns ?? true;
 
-  return defineRenderer(async (_denops, { items }) => {
+  return defineRenderer((_denops, { items }) => {
     if (items.length === 0) {
       return;
     }
@@ -150,7 +149,6 @@ export function smartGrep(
 
       // Format path
       const displayPath = useRelativePaths ? path : path;
-      const filename = basename(displayPath);
       const pathPart = alignColumns
         ? displayPath.padEnd(maxPathWidth)
         : displayPath;

builtin/source/grep.ts

@@ -100,7 +100,7 @@ export function grep(
         signal?.throwIfAborted();
 
         // Get results from quickfix list
-        const qflist = await fn.getqflist(denops) as Array<{
+        const qflist = await fn.getqflist(denops) as unknown as Array<{
           bufnr: number;
           lnum: number;
           col: number;
@@ -146,7 +146,6 @@ export function grep(
       } else {
         // Execute grep directly and parse output
         const grepprg = await denops.eval("&grepprg") as string;
-        const grepformat = await denops.eval("&grepformat") as string;
 
         // This is a simplified implementation
         // In practice, we'd need to properly parse grepformat

builtin/source/vimgrep.ts

@@ -106,7 +106,7 @@ export function vimgrep(
         signal?.throwIfAborted();
 
         // Get results from quickfix list
-        const qflist = await fn.getqflist(denops) as Array<{
+        const qflist = await fn.getqflist(denops) as unknown as Array<{
           bufnr: number;
           lnum: number;
           col: number;
@@ -157,7 +157,7 @@ export function vimgrep(
         await denops.cmd(`silent! ${vimgrepCmd}`);
         signal?.throwIfAborted();
 
-        const qflist = await fn.getqflist(denops) as Array<{
+        const qflist = await fn.getqflist(denops) as unknown as Array<{
           bufnr: number;
           lnum: number;
           col: number;