Fix lens.c compile error: add missing Xft/fontconfig headers

- lens.c: add #include <X11/Xft/Xft.h> and <fontconfig/fontconfig.h>
  (XftFont, XGlyphInfo, etc. were declared but the header was never included)
- quill.c: remove unused flen variable in ed_find_next()
- rigel.c: remove unused get_file() helper (get_fidx() is used throughout)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lens/lens.c

@@ -20,6 +20,8 @@
 #include <X11/Xutil.h>
 #include <X11/Xatom.h>
 #include <X11/keysym.h>
+#include <X11/Xft/Xft.h>
+#include <fontconfig/fontconfig.h>
 #include <Imlib2.h>
 #include <dirent.h>
 #include <stdio.h>

quill/quill.c

@@ -333,7 +333,6 @@ static void ed_word_right(void) {
 /* find: returns line of next match, -1 if none */
 static int ed_find_next(int from_line, int from_col) {
     if (!ed.find[0]) return -1;
-    int flen = ed.find_len;
     for (int pass = 0; pass < 2; pass++) {
         int start_line = (pass == 0) ? from_line : 0;
         for (int i = start_line; i < ed.nlines; i++) {

rigel/rigel.c

@@ -302,14 +302,6 @@ static void search_filter(Rigel *r) {
 }
 
 static int  get_nvis(Rigel *r) { return r->search_on ? r->nfiltered : r->nfiles; }
-static FileEntry *get_file(Rigel *r, int vis_idx) {
-    if (r->search_on) {
-        if (vis_idx < 0 || vis_idx >= r->nfiltered) return NULL;
-        return &r->files[r->filtered[vis_idx]];
-    }
-    if (vis_idx < 0 || vis_idx >= r->nfiles) return NULL;
-    return &r->files[vis_idx];
-}
 /* translate visual row (vis_idx) → files[] index */
 static int  get_fidx(Rigel *r, int vis_idx) {
     if (r->search_on) {