Use FuriString instead of mlib string_t.

metronome.c

@@ -1,7 +1,7 @@
 #include <furi.h>
 #include <furi_hal.h>
 #include <input/input.h>
-#include <m-string.h>
+#include <core/string.h>
 #include <stdlib.h>
 
 #include <gui/gui.h>
@@ -65,23 +65,22 @@ static void render_callback(Canvas* const canvas, void* ctx) {
   const MetronomeState* metronome_state = (MetronomeState*)ctx;
   furi_mutex_acquire(metronome_state->mutex, FuriWaitForever);
 
-  string_t tempStr;
-  string_init(tempStr);
+  FuriString* tempStr = furi_string_alloc();
 
   canvas_draw_frame(canvas, 0, 0, 128, 64);
 
   canvas_set_font(canvas, FontPrimary);
   
   // draw bars/beat
-  string_printf(tempStr, "%d/%d", metronome_state->beats_per_bar, metronome_state->note_length);
-  canvas_draw_str_aligned(canvas, 64, 8, AlignCenter, AlignCenter, string_get_cstr(tempStr));
-  string_reset(tempStr);
+  furi_string_printf(tempStr, "%d/%d", metronome_state->beats_per_bar, metronome_state->note_length);
+  canvas_draw_str_aligned(canvas, 64, 8, AlignCenter, AlignCenter, furi_string_get_cstr(tempStr));
+  furi_string_reset(tempStr);
 
   // draw BPM value
-  string_printf(tempStr, "%.2f", metronome_state->bpm);
+  furi_string_printf(tempStr, "%.2f", metronome_state->bpm);
   canvas_set_font(canvas, FontBigNumbers);
-  canvas_draw_str_aligned(canvas, 64, 24, AlignCenter, AlignCenter, string_get_cstr(tempStr));
-  string_reset(tempStr);
+  canvas_draw_str_aligned(canvas, 64, 24, AlignCenter, AlignCenter, furi_string_get_cstr(tempStr));
+  furi_string_reset(tempStr);
 
   // draw volume indicator
   // always draw first waves
@@ -111,7 +110,7 @@ static void render_callback(Canvas* const canvas, void* ctx) {
   elements_progress_bar(canvas, 8, 36, 112, (float)metronome_state->current_beat/metronome_state->beats_per_bar);
 
   // cleanup
-  string_clear(tempStr);
+  furi_string_free(tempStr);
   furi_mutex_release(metronome_state->mutex);
 }