fix: screen freeze issue && optimize sram usage

Signed-off-by: Lu1zz <yu.lu@onekey.so>

Author: Lu1zz

core/embed/lvgl/lv_font_ex.h

@@ -29,7 +29,7 @@ typedef struct __attribute__((packed)) {
   int8_t ofs_y;
 } glyph_dsc_t;
 
-#define FONT_CACHE_NUM 64
+#define FONT_CACHE_NUM 32
 
 typedef struct {
   uint32_t unicode_letter;

core/src/trezor/lvglui/scrs/address.py

@@ -678,11 +678,9 @@ def _prepare_chain_message(self, name):
         else:
             return self._prepare_default_message()
 
-    async def generate_address(self, name, index=0, ctx=None):
+    async def generate_address(self, name, index=0, ctx=wire.DUMMY_CONTEXT):
         """Main logic for generating addresses"""
 
-        ctx = wire.DummyContext()
-
         self.current_index = index
         state = self.STATE.INIT
 

core/src/trezor/lvglui/scrs/homescreen.py

@@ -707,7 +707,7 @@ async def _get_passphrase_from_user(self, init=False, prev_scr=None):
                 script_type=InputScriptType.SPENDADDRESS,
             )
             # pyright: off
-            await btc_get_address(wire.DummyContext(), msg)
+            await btc_get_address(wire.QRContext(), msg)
             # pyright: on
 
         except Exception: