diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
index 28437e6302..41dd02458e 100644
--- a/.github/PULL_REQUEST_TEMPLATE.md
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -7,6 +7,7 @@
 - [ ] Bugfix (non-breaking change which fixes an issue)
 - [ ] New feature (non-breaking change which adds functionality)
 - [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] Developer breaking change (an API change that could break external components)
 - [ ] Code quality improvements to existing code or addition of tests
 - [ ] Other
 
diff --git a/.github/actions/restore-python/action.yml b/.github/actions/restore-python/action.yml
index f314e79ad9..c4ac3d1a9e 100644
--- a/.github/actions/restore-python/action.yml
+++ b/.github/actions/restore-python/action.yml
@@ -17,7 +17,7 @@ runs:
   steps:
     - name: Set up Python ${{ inputs.python-version }}
       id: python
-      uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+      uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
       with:
         python-version: ${{ inputs.python-version }}
     - name: Restore Python virtual environment
diff --git a/.github/workflows/auto-label-pr.yml b/.github/workflows/auto-label-pr.yml
index 998f3315c6..d09072d814 100644
--- a/.github/workflows/auto-label-pr.yml
+++ b/.github/workflows/auto-label-pr.yml
@@ -68,6 +68,7 @@ jobs:
               'bugfix',
               'new-feature',
               'breaking-change',
+              'developer-breaking-change',
               'code-quality'
             ];
 
@@ -367,6 +368,7 @@ jobs:
                 { pattern: /- \[x\] Bugfix \(non-breaking change which fixes an issue\)/i, label: 'bugfix' },
                 { pattern: /- \[x\] New feature \(non-breaking change which adds functionality\)/i, label: 'new-feature' },
                 { pattern: /- \[x\] Breaking change \(fix or feature that would cause existing functionality to not work as expected\)/i, label: 'breaking-change' },
+                { pattern: /- \[x\] Developer breaking change \(an API change that could break external components\)/i, label: 'developer-breaking-change' },
                 { pattern: /- \[x\] Code quality improvements to existing code or addition of tests/i, label: 'code-quality' }
               ];
 
diff --git a/.github/workflows/ci-api-proto.yml b/.github/workflows/ci-api-proto.yml
index b377ca76d8..2bee5ed211 100644
--- a/.github/workflows/ci-api-proto.yml
+++ b/.github/workflows/ci-api-proto.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Set up Python
-        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
           python-version: "3.11"
 
diff --git a/.github/workflows/ci-clang-tidy-hash.yml b/.github/workflows/ci-clang-tidy-hash.yml
index 9556b99015..1826ed27cf 100644
--- a/.github/workflows/ci-clang-tidy-hash.yml
+++ b/.github/workflows/ci-clang-tidy-hash.yml
@@ -24,7 +24,7 @@ jobs:
         uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Set up Python
-        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
           python-version: "3.11"
 
diff --git a/.github/workflows/ci-docker.yml b/.github/workflows/ci-docker.yml
index 5287d92b10..c76d9cf2a5 100644
--- a/.github/workflows/ci-docker.yml
+++ b/.github/workflows/ci-docker.yml
@@ -45,7 +45,7 @@ jobs:
     steps:
       - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Set up Python
-        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
           python-version: "3.11"
       - name: Set up Docker Buildx
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9c2fab0912..9cfc02d5cf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,7 +42,7 @@ jobs:
         run: echo key="${{ hashFiles('requirements.txt', 'requirements_test.txt', '.pre-commit-config.yaml') }}" >> $GITHUB_OUTPUT
       - name: Set up Python ${{ env.DEFAULT_PYTHON }}
         id: python
-        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
           python-version: ${{ env.DEFAULT_PYTHON }}
       - name: Restore Python virtual environment
@@ -240,7 +240,7 @@ jobs:
         uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Set up Python 3.13
         id: python
-        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
           python-version: "3.13"
       - name: Restore Python virtual environment
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 497ecd29e7..1ff810d869 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Set up Python
-        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
           python-version: "3.x"
       - name: Build
@@ -94,7 +94,7 @@ jobs:
     steps:
       - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Set up Python
-        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
           python-version: "3.11"
 
diff --git a/.github/workflows/sync-device-classes.yml b/.github/workflows/sync-device-classes.yml
index 8f95fa68ee..baaa29df2c 100644
--- a/.github/workflows/sync-device-classes.yml
+++ b/.github/workflows/sync-device-classes.yml
@@ -22,7 +22,7 @@ jobs:
           path: lib/home-assistant
 
       - name: Setup Python
-        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
         with:
           python-version: 3.13
 
diff --git a/esphome/components/alpha3/alpha3.cpp b/esphome/components/alpha3/alpha3.cpp
index 55fd196822..f22a8e2444 100644
--- a/esphome/components/alpha3/alpha3.cpp
+++ b/esphome/components/alpha3/alpha3.cpp
@@ -58,7 +58,7 @@ void Alpha3::handle_geni_response_(const uint8_t *response, uint16_t length) {
   if (this->response_offset_ >= this->response_length_) {
     ESP_LOGD(TAG, "[%s] GENI response begin", this->parent_->address_str());
     if (length < GENI_RESPONSE_HEADER_LENGTH) {
-      ESP_LOGW(TAG, "[%s] response to short", this->parent_->address_str());
+      ESP_LOGW(TAG, "[%s] response too short", this->parent_->address_str());
       return;
     }
     if (response[0] != 36 || response[2] != 248 || response[3] != 231 || response[4] != 10) {
diff --git a/esphome/components/esp32/__init__.py b/esphome/components/esp32/__init__.py
index 59c6029334..d372af3e6a 100644
--- a/esphome/components/esp32/__init__.py
+++ b/esphome/components/esp32/__init__.py
@@ -854,6 +854,10 @@ def _configure_lwip_max_sockets(conf: dict) -> None:
 async def to_code(config):
     cg.add_platformio_option("board", config[CONF_BOARD])
     cg.add_platformio_option("board_upload.flash_size", config[CONF_FLASH_SIZE])
+    cg.add_platformio_option(
+        "board_upload.maximum_size",
+        int(config[CONF_FLASH_SIZE].removesuffix("MB")) * 1024 * 1024,
+    )
     cg.set_cpp_standard("gnu++20")
     cg.add_build_flag("-DUSE_ESP32")
     cg.add_define("ESPHOME_BOARD", config[CONF_BOARD])
diff --git a/esphome/components/esp8266/core.h b/esphome/components/esp8266/core.h
index ac33305669..1abe67be86 100644
--- a/esphome/components/esp8266/core.h
+++ b/esphome/components/esp8266/core.h
@@ -7,8 +7,6 @@
 extern const uint8_t ESPHOME_ESP8266_GPIO_INITIAL_MODE[16];
 extern const uint8_t ESPHOME_ESP8266_GPIO_INITIAL_LEVEL[16];
 
-namespace esphome {
-namespace esp8266 {}  // namespace esp8266
-}  // namespace esphome
+namespace esphome::esp8266 {}  // namespace esphome::esp8266
 
 #endif  // USE_ESP8266
diff --git a/esphome/components/esp8266/gpio.cpp b/esphome/components/esp8266/gpio.cpp
index ee3683c67d..17a495bc1d 100644
--- a/esphome/components/esp8266/gpio.cpp
+++ b/esphome/components/esp8266/gpio.cpp
@@ -3,8 +3,7 @@
 #include "gpio.h"
 #include "esphome/core/log.h"
 
-namespace esphome {
-namespace esp8266 {
+namespace esphome::esp8266 {
 
 static const char *const TAG = "esp8266";
 
@@ -110,9 +109,11 @@ void ESP8266GPIOPin::digital_write(bool value) {
 }
 void ESP8266GPIOPin::detach_interrupt() const { detachInterrupt(pin_); }
 
-}  // namespace esp8266
+}  // namespace esphome::esp8266
 
-using namespace esp8266;
+namespace esphome {
+
+using esp8266::ISRPinArg;
 
 bool IRAM_ATTR ISRInternalGPIOPin::digital_read() {
   auto *arg = reinterpret_cast<ISRPinArg *>(this->arg_);
diff --git a/esphome/components/esp8266/gpio.h b/esphome/components/esp8266/gpio.h
index a1b6d79b3b..213a5c54be 100644
--- a/esphome/components/esp8266/gpio.h
+++ b/esphome/components/esp8266/gpio.h
@@ -5,8 +5,7 @@
 #include "esphome/core/hal.h"
 #include <Arduino.h>
 
-namespace esphome {
-namespace esp8266 {
+namespace esphome::esp8266 {
 
 class ESP8266GPIOPin : public InternalGPIOPin {
  public:
@@ -33,7 +32,6 @@ class ESP8266GPIOPin : public InternalGPIOPin {
   gpio::Flags flags_{};
 };
 
-}  // namespace esp8266
-}  // namespace esphome
+}  // namespace esphome::esp8266
 
 #endif  // USE_ESP8266
diff --git a/esphome/components/esp8266/preferences.cpp b/esphome/components/esp8266/preferences.cpp
index a26e9cc498..197d244dc4 100644
--- a/esphome/components/esp8266/preferences.cpp
+++ b/esphome/components/esp8266/preferences.cpp
@@ -15,24 +15,24 @@ extern "C" {
 #include <cstring>
 #include <memory>
 
-namespace esphome {
-namespace esp8266 {
+namespace esphome::esp8266 {
 
 static const char *const TAG = "esp8266.preferences";
 
-static bool s_prevent_write = false;         // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 static uint32_t *s_flash_storage = nullptr;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
+static bool s_prevent_write = false;         // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 static bool s_flash_dirty = false;           // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
-static const uint32_t ESP_RTC_USER_MEM_START = 0x60001200;
+static constexpr uint32_t ESP_RTC_USER_MEM_START = 0x60001200;
+static constexpr uint32_t ESP_RTC_USER_MEM_SIZE_WORDS = 128;
+static constexpr uint32_t ESP_RTC_USER_MEM_SIZE_BYTES = ESP_RTC_USER_MEM_SIZE_WORDS * 4;
+
 #define ESP_RTC_USER_MEM ((uint32_t *) ESP_RTC_USER_MEM_START)
-static const uint32_t ESP_RTC_USER_MEM_SIZE_WORDS = 128;
-static const uint32_t ESP_RTC_USER_MEM_SIZE_BYTES = ESP_RTC_USER_MEM_SIZE_WORDS * 4;
 
 #ifdef USE_ESP8266_PREFERENCES_FLASH
-static const uint32_t ESP8266_FLASH_STORAGE_SIZE = 128;
+static constexpr uint32_t ESP8266_FLASH_STORAGE_SIZE = 128;
 #else
-static const uint32_t ESP8266_FLASH_STORAGE_SIZE = 64;
+static constexpr uint32_t ESP8266_FLASH_STORAGE_SIZE = 64;
 #endif
 
 static inline bool esp_rtc_user_mem_read(uint32_t index, uint32_t *dest) {
@@ -284,10 +284,10 @@ void setup_preferences() {
 }
 void preferences_prevent_write(bool prevent) { s_prevent_write = prevent; }
 
-}  // namespace esp8266
+}  // namespace esphome::esp8266
 
+namespace esphome {
 ESPPreferences *global_preferences;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
-
 }  // namespace esphome
 
 #endif  // USE_ESP8266
diff --git a/esphome/components/esp8266/preferences.h b/esphome/components/esp8266/preferences.h
index edec915794..16cf80a129 100644
--- a/esphome/components/esp8266/preferences.h
+++ b/esphome/components/esp8266/preferences.h
@@ -2,13 +2,11 @@
 
 #ifdef USE_ESP8266
 
-namespace esphome {
-namespace esp8266 {
+namespace esphome::esp8266 {
 
 void setup_preferences();
 void preferences_prevent_write(bool prevent);
 
-}  // namespace esp8266
-}  // namespace esphome
+}  // namespace esphome::esp8266
 
 #endif  // USE_ESP8266
diff --git a/esphome/components/lvgl/defines.py b/esphome/components/lvgl/defines.py
index f2bcb6cc06..6b3b9c97ef 100644
--- a/esphome/components/lvgl/defines.py
+++ b/esphome/components/lvgl/defines.py
@@ -279,6 +279,8 @@ KEYBOARD_MODES = LvConstant(
 )
 ROLLER_MODES = LvConstant("LV_ROLLER_MODE_", "NORMAL", "INFINITE")
 TILE_DIRECTIONS = DIRECTIONS.extend("HOR", "VER", "ALL")
+SCROLL_DIRECTIONS = TILE_DIRECTIONS.extend("NONE")
+SNAP_DIRECTIONS = LvConstant("LV_SCROLL_SNAP_", "NONE", "START", "END", "CENTER")
 CHILD_ALIGNMENTS = LvConstant(
     "LV_ALIGN_",
     "TOP_LEFT",
@@ -511,6 +513,9 @@ CONF_ROLLOVER = "rollover"
 CONF_ROOT_BACK_BTN = "root_back_btn"
 CONF_SCALE_LINES = "scale_lines"
 CONF_SCROLLBAR_MODE = "scrollbar_mode"
+CONF_SCROLL_DIR = "scroll_dir"
+CONF_SCROLL_SNAP_X = "scroll_snap_x"
+CONF_SCROLL_SNAP_Y = "scroll_snap_y"
 CONF_SELECTED_INDEX = "selected_index"
 CONF_SELECTED_TEXT = "selected_text"
 CONF_SHOW_SNOW = "show_snow"
diff --git a/esphome/components/lvgl/layout.py b/esphome/components/lvgl/layout.py
index a6aa816fda..b27a0b54a2 100644
--- a/esphome/components/lvgl/layout.py
+++ b/esphome/components/lvgl/layout.py
@@ -36,6 +36,8 @@ from .defines import (
 )
 from .lv_validation import padding, size
 
+CONF_MULTIPLE_WIDGETS_PER_CELL = "multiple_widgets_per_cell"
+
 cell_alignments = LV_CELL_ALIGNMENTS.one_of
 grid_alignments = LV_GRID_ALIGNMENTS.one_of
 flex_alignments = LV_FLEX_ALIGNMENTS.one_of
@@ -170,10 +172,14 @@ class DirectionalLayout(FlexLayout):
 
     def validate(self, config):
         assert config[CONF_LAYOUT].lower() == self.direction
-        config[CONF_LAYOUT] = {
+        layout = {
             **FLEX_HV_STYLE,
             CONF_FLEX_FLOW: "LV_FLEX_FLOW_" + self.flow.upper(),
         }
+        if pad_all := config.get("pad_all"):
+            layout[CONF_PAD_ROW] = pad_all
+            layout[CONF_PAD_COLUMN] = pad_all
+        config[CONF_LAYOUT] = layout
         return config
 
 
@@ -220,6 +226,7 @@ class GridLayout(Layout):
                 cv.Optional(CONF_GRID_ROW_ALIGN): grid_alignments,
                 cv.Optional(CONF_PAD_ROW): padding,
                 cv.Optional(CONF_PAD_COLUMN): padding,
+                cv.Optional(CONF_MULTIPLE_WIDGETS_PER_CELL, default=False): cv.boolean,
             },
             {
                 cv.Optional(CONF_GRID_CELL_ROW_POS): cv.positive_int,
@@ -263,6 +270,7 @@ class GridLayout(Layout):
         # should be guaranteed to be a dict at this point
         assert isinstance(layout, dict)
         assert layout.get(CONF_TYPE).lower() == TYPE_GRID
+        allow_multiple = layout.get(CONF_MULTIPLE_WIDGETS_PER_CELL, False)
         rows = len(layout[CONF_GRID_ROWS])
         columns = len(layout[CONF_GRID_COLUMNS])
         used_cells = [[None] * columns for _ in range(rows)]
@@ -299,7 +307,10 @@ class GridLayout(Layout):
                             f"exceeds grid size {rows}x{columns}",
                             [CONF_WIDGETS, index],
                         )
-                    if used_cells[row + i][column + j] is not None:
+                    if (
+                        not allow_multiple
+                        and used_cells[row + i][column + j] is not None
+                    ):
                         raise cv.Invalid(
                             f"Cell span {row + i}/{column + j} already occupied by widget at index {used_cells[row + i][column + j]}",
                             [CONF_WIDGETS, index],
diff --git a/esphome/components/lvgl/lv_validation.py b/esphome/components/lvgl/lv_validation.py
index 23c322c31f..9c1dd22085 100644
--- a/esphome/components/lvgl/lv_validation.py
+++ b/esphome/components/lvgl/lv_validation.py
@@ -40,7 +40,7 @@ from .helpers import (
     lv_fonts_used,
     requires_component,
 )
-from .types import lv_font_t, lv_gradient_t
+from .types import lv_gradient_t
 
 opacity_consts = LvConstant("LV_OPA_", "TRANSP", "COVER")
 
@@ -498,7 +498,9 @@ class LvFont(LValidator):
             esphome_fonts_used.add(fontval)
             return requires_component("font")(fontval)
 
-        super().__init__(validator, lv_font_t)
+        # Use font::Font* as return type for lambdas returning ESPHome fonts
+        # The inline overloads in lvgl_esphome.h handle conversion to lv_font_t*
+        super().__init__(validator, Font.operator("ptr"))
 
     async def process(self, value, args=()):
         if is_lv_font(value):
diff --git a/esphome/components/lvgl/schemas.py b/esphome/components/lvgl/schemas.py
index 6b77f66abb..f2704f99de 100644
--- a/esphome/components/lvgl/schemas.py
+++ b/esphome/components/lvgl/schemas.py
@@ -1,6 +1,7 @@
 from esphome import config_validation as cv
 from esphome.automation import Trigger, validate_automation
 from esphome.components.time import RealTimeClock
+from esphome.config_validation import prepend_path
 from esphome.const import (
     CONF_ARGS,
     CONF_FORMAT,
@@ -19,7 +20,14 @@ from esphome.core import TimePeriod
 from esphome.core.config import StartupTrigger
 
 from . import defines as df, lv_validation as lvalid
-from .defines import CONF_TIME_FORMAT, LV_GRAD_DIR
+from .defines import (
+    CONF_SCROLL_DIR,
+    CONF_SCROLL_SNAP_X,
+    CONF_SCROLL_SNAP_Y,
+    CONF_SCROLLBAR_MODE,
+    CONF_TIME_FORMAT,
+    LV_GRAD_DIR,
+)
 from .helpers import CONF_IF_NAN, requires_component, validate_printf
 from .layout import (
     FLEX_OBJ_SCHEMA,
@@ -233,9 +241,19 @@ STYLE_SCHEMA = cv.Schema({cv.Optional(k): v for k, v in STYLE_PROPS.items()}).ex
         cv.Optional(df.CONF_SCROLLBAR_MODE): df.LvConstant(
             "LV_SCROLLBAR_MODE_", "OFF", "ON", "ACTIVE", "AUTO"
         ).one_of,
+        cv.Optional(CONF_SCROLL_DIR): df.SCROLL_DIRECTIONS.one_of,
+        cv.Optional(CONF_SCROLL_SNAP_X): df.SNAP_DIRECTIONS.one_of,
+        cv.Optional(CONF_SCROLL_SNAP_Y): df.SNAP_DIRECTIONS.one_of,
     }
 )
 
+OBJ_PROPERTIES = {
+    CONF_SCROLL_SNAP_X,
+    CONF_SCROLL_SNAP_Y,
+    CONF_SCROLL_DIR,
+    CONF_SCROLLBAR_MODE,
+}
+
 # Also allow widget specific properties for use in style definitions
 FULL_STYLE_SCHEMA = STYLE_SCHEMA.extend(
     {
@@ -422,7 +440,10 @@ def any_widget_schema(extras=None):
     def validator(value):
         if isinstance(value, dict):
             # Convert to list
+            is_dict = True
             value = [{k: v} for k, v in value.items()]
+        else:
+            is_dict = False
         if not isinstance(value, list):
             raise cv.Invalid("Expected a list of widgets")
         result = []
@@ -443,7 +464,9 @@ def any_widget_schema(extras=None):
                 )
             # Apply custom validation
             value = widget_type.validate(value or {})
-            result.append({key: container_validator(value)})
+            path = [key] if is_dict else [index, key]
+            with prepend_path(path):
+                result.append({key: container_validator(value)})
         return result
 
     return validator
diff --git a/esphome/components/lvgl/widgets/__init__.py b/esphome/components/lvgl/widgets/__init__.py
index 187b5828c2..2e7948522e 100644
--- a/esphome/components/lvgl/widgets/__init__.py
+++ b/esphome/components/lvgl/widgets/__init__.py
@@ -21,7 +21,6 @@ from ..defines import (
     CONF_MAIN,
     CONF_PAD_COLUMN,
     CONF_PAD_ROW,
-    CONF_SCROLLBAR_MODE,
     CONF_STYLES,
     CONF_WIDGETS,
     OBJ_FLAGS,
@@ -45,7 +44,7 @@ from ..lvcode import (
     lv_obj,
     lv_Pvariable,
 )
-from ..schemas import ALL_STYLES, STYLE_REMAP, WIDGET_TYPES
+from ..schemas import ALL_STYLES, OBJ_PROPERTIES, STYLE_REMAP, WIDGET_TYPES
 from ..types import LV_STATE, LvType, WidgetType, lv_coord_t, lv_obj_t, lv_obj_t_ptr
 
 EVENT_LAMB = "event_lamb__"
@@ -414,7 +413,8 @@ async def set_obj_properties(w: Widget, config):
                 w.add_state(state)
                 cond.else_()
                 w.clear_state(state)
-    await w.set_property(CONF_SCROLLBAR_MODE, config, lv_name="obj")
+    for property in OBJ_PROPERTIES:
+        await w.set_property(property, config, lv_name="obj")
 
 
 async def add_widgets(parent: Widget, config: dict):
diff --git a/esphome/components/lvgl/widgets/arc.py b/esphome/components/lvgl/widgets/arc.py
index ef4da0d815..21530441f8 100644
--- a/esphome/components/lvgl/widgets/arc.py
+++ b/esphome/components/lvgl/widgets/arc.py
@@ -20,7 +20,13 @@ from ..defines import (
     CONF_START_ANGLE,
     literal,
 )
-from ..lv_validation import get_start_value, lv_angle_degrees, lv_float, lv_int
+from ..lv_validation import (
+    get_start_value,
+    lv_angle_degrees,
+    lv_float,
+    lv_int,
+    lv_positive_int,
+)
 from ..lvcode import lv, lv_expr, lv_obj
 from ..types import LvNumber, NumberType
 from . import Widget
@@ -36,13 +42,20 @@ ARC_SCHEMA = cv.Schema(
         cv.Optional(CONF_ROTATION, default=0.0): lv_angle_degrees,
         cv.Optional(CONF_ADJUSTABLE, default=False): bool,
         cv.Optional(CONF_MODE, default="NORMAL"): ARC_MODES.one_of,
-        cv.Optional(CONF_CHANGE_RATE, default=720): cv.uint16_t,
+        cv.Optional(CONF_CHANGE_RATE, default=720): lv_positive_int,
     }
 )
 
 ARC_MODIFY_SCHEMA = cv.Schema(
     {
         cv.Optional(CONF_VALUE): lv_float,
+        cv.Optional(CONF_MIN_VALUE): lv_int,
+        cv.Optional(CONF_MAX_VALUE): lv_int,
+        cv.Optional(CONF_START_ANGLE): lv_angle_degrees,
+        cv.Optional(CONF_END_ANGLE): lv_angle_degrees,
+        cv.Optional(CONF_ROTATION): lv_angle_degrees,
+        cv.Optional(CONF_MODE): ARC_MODES.one_of,
+        cv.Optional(CONF_CHANGE_RATE): lv_positive_int,
     }
 )
 
@@ -58,17 +71,34 @@ class ArcType(NumberType):
         )
 
     async def to_code(self, w: Widget, config):
-        if CONF_MIN_VALUE in config:
+        if CONF_MIN_VALUE in config and CONF_MAX_VALUE in config:
             max_value = await lv_int.process(config[CONF_MAX_VALUE])
             min_value = await lv_int.process(config[CONF_MIN_VALUE])
             lv.arc_set_range(w.obj, min_value, max_value)
-            start = await lv_angle_degrees.process(config[CONF_START_ANGLE])
-            end = await lv_angle_degrees.process(config[CONF_END_ANGLE])
-            rotation = await lv_angle_degrees.process(config[CONF_ROTATION])
-            lv.arc_set_bg_angles(w.obj, start, end)
-            lv.arc_set_rotation(w.obj, rotation)
-            lv.arc_set_mode(w.obj, literal(config[CONF_MODE]))
-            lv.arc_set_change_rate(w.obj, config[CONF_CHANGE_RATE])
+        elif CONF_MIN_VALUE in config:
+            max_value = w.get_property(CONF_MAX_VALUE)
+            min_value = await lv_int.process(config[CONF_MIN_VALUE])
+            lv.arc_set_range(w.obj, min_value, max_value)
+        elif CONF_MAX_VALUE in config:
+            max_value = await lv_int.process(config[CONF_MAX_VALUE])
+            min_value = w.get_property(CONF_MIN_VALUE)
+            lv.arc_set_range(w.obj, min_value, max_value)
+
+        await w.set_property(
+            CONF_START_ANGLE,
+            await lv_angle_degrees.process(config.get(CONF_START_ANGLE)),
+        )
+        await w.set_property(
+            CONF_END_ANGLE, await lv_angle_degrees.process(config.get(CONF_END_ANGLE))
+        )
+        await w.set_property(
+            CONF_ROTATION, await lv_angle_degrees.process(config.get(CONF_ROTATION))
+        )
+        await w.set_property(CONF_MODE, config)
+        await w.set_property(
+            CONF_CHANGE_RATE,
+            await lv_positive_int.process(config.get(CONF_CHANGE_RATE)),
+        )
 
         if CONF_ADJUSTABLE in config:
             if not config[CONF_ADJUSTABLE]:
@@ -78,9 +108,7 @@ class ArcType(NumberType):
                 # For some reason arc does not get automatically added to the default group
                 lv.group_add_obj(lv_expr.group_get_default(), w.obj)
 
-        value = await get_start_value(config)
-        if value is not None:
-            lv.arc_set_value(w.obj, value)
+        await w.set_property(CONF_VALUE, await get_start_value(config))
 
 
 arc_spec = ArcType()
diff --git a/esphome/components/lvgl/widgets/line.py b/esphome/components/lvgl/widgets/line.py
index bd90edbefc..57cb965737 100644
--- a/esphome/components/lvgl/widgets/line.py
+++ b/esphome/components/lvgl/widgets/line.py
@@ -6,7 +6,7 @@ from esphome.core import Lambda
 from ..defines import CONF_MAIN, call_lambda
 from ..lvcode import lv_add
 from ..schemas import point_schema
-from ..types import LvCompound, LvType
+from ..types import LvCompound, LvType, lv_coord_t
 from . import Widget, WidgetType
 
 CONF_LINE = "line"
@@ -23,9 +23,7 @@ LINE_SCHEMA = {
 
 async def process_coord(coord):
     if isinstance(coord, Lambda):
-        coord = call_lambda(
-            await cg.process_lambda(coord, [], return_type="lv_coord_t")
-        )
+        coord = call_lambda(await cg.process_lambda(coord, [], return_type=lv_coord_t))
         if not coord.endswith("()"):
             coord = f"static_cast<lv_coord_t>({coord})"
         return cg.RawExpression(coord)
diff --git a/esphome/components/nextion/nextion_upload_arduino.cpp b/esphome/components/nextion/nextion_upload_arduino.cpp
index b4d217d7aa..baea938729 100644
--- a/esphome/components/nextion/nextion_upload_arduino.cpp
+++ b/esphome/components/nextion/nextion_upload_arduino.cpp
@@ -174,6 +174,9 @@ bool Nextion::upload_tft(uint32_t baud_rate, bool exit_reparse) {
 
   // Check if baud rate is supported
   this->original_baud_rate_ = this->parent_->get_baud_rate();
+  if (baud_rate <= 0) {
+    baud_rate = this->original_baud_rate_;
+  }
   ESP_LOGD(TAG, "Baud rate: %" PRIu32, baud_rate);
 
   // Define the configuration for the HTTP client
diff --git a/esphome/components/nextion/nextion_upload_idf.cpp b/esphome/components/nextion/nextion_upload_idf.cpp
index 3b0d65643d..942e3dd6c3 100644
--- a/esphome/components/nextion/nextion_upload_idf.cpp
+++ b/esphome/components/nextion/nextion_upload_idf.cpp
@@ -177,6 +177,9 @@ bool Nextion::upload_tft(uint32_t baud_rate, bool exit_reparse) {
 
   // Check if baud rate is supported
   this->original_baud_rate_ = this->parent_->get_baud_rate();
+  if (baud_rate <= 0) {
+    baud_rate = this->original_baud_rate_;
+  }
   ESP_LOGD(TAG, "Baud rate: %" PRIu32, baud_rate);
 
   // Define the configuration for the HTTP client
diff --git a/esphome/components/script/script.h b/esphome/components/script/script.h
index a9a83b518c..cd1a084f16 100644
--- a/esphome/components/script/script.h
+++ b/esphome/components/script/script.h
@@ -278,7 +278,12 @@ template<class C, typename... Ts> class ScriptWaitAction : public Action<Ts...>,
 
   void setup() override {
     // Start with loop disabled - only enable when there's work to do
-    this->disable_loop();
+    // IMPORTANT: Only disable if num_running_ is 0, otherwise play_complex() was already
+    // called before our setup() (e.g., from on_boot trigger at same priority level)
+    // and we must not undo its enable_loop() call
+    if (this->num_running_ == 0) {
+      this->disable_loop();
+    }
   }
 
   void play_complex(const Ts &...x) override {
diff --git a/esphome/components/sht4x/sht4x.cpp b/esphome/components/sht4x/sht4x.cpp
index 617b19ef3e..9d29746f0b 100644
--- a/esphome/components/sht4x/sht4x.cpp
+++ b/esphome/components/sht4x/sht4x.cpp
@@ -7,6 +7,7 @@ namespace sht4x {
 static const char *const TAG = "sht4x";
 
 static const uint8_t MEASURECOMMANDS[] = {0xFD, 0xF6, 0xE0};
+static const uint8_t SERIAL_NUMBER_COMMAND = 0x89;
 
 void SHT4XComponent::start_heater_() {
   uint8_t cmd[] = {MEASURECOMMANDS[this->heater_command_]};
@@ -17,6 +18,17 @@ void SHT4XComponent::start_heater_() {
   }
 }
 
+void SHT4XComponent::read_serial_number_() {
+  uint16_t buffer[2];
+  if (!this->get_8bit_register(SERIAL_NUMBER_COMMAND, buffer, 2, 1)) {
+    ESP_LOGE(TAG, "Get serial number failed");
+    this->serial_number_ = 0;
+    return;
+  }
+  this->serial_number_ = (uint32_t(buffer[0]) << 16) | (uint32_t(buffer[1]));
+  ESP_LOGD(TAG, "Serial number: %08" PRIx32, this->serial_number_);
+}
+
 void SHT4XComponent::setup() {
   auto err = this->write(nullptr, 0);
   if (err != i2c::ERROR_OK) {
@@ -24,6 +36,8 @@ void SHT4XComponent::setup() {
     return;
   }
 
+  this->read_serial_number_();
+
   if (std::isfinite(this->duty_cycle_) && this->duty_cycle_ > 0.0f) {
     uint32_t heater_interval = static_cast<uint32_t>(static_cast<uint16_t>(this->heater_time_) / this->duty_cycle_);
     ESP_LOGD(TAG, "Heater interval: %" PRIu32, heater_interval);
@@ -54,11 +68,18 @@ void SHT4XComponent::setup() {
 }
 
 void SHT4XComponent::dump_config() {
-  ESP_LOGCONFIG(TAG, "SHT4x:");
+  ESP_LOGCONFIG(TAG,
+                "SHT4x:\n"
+                "  Serial number: %08" PRIx32,
+                this->serial_number_);
+
   LOG_I2C_DEVICE(this);
   if (this->is_failed()) {
     ESP_LOGE(TAG, ESP_LOG_MSG_COMM_FAIL);
   }
+  if (this->serial_number_ == 0) {
+    ESP_LOGW(TAG, "Get serial number failed");
+  }
 }
 
 void SHT4XComponent::update() {
diff --git a/esphome/components/sht4x/sht4x.h b/esphome/components/sht4x/sht4x.h
index accc7323be..aec0f3d7f8 100644
--- a/esphome/components/sht4x/sht4x.h
+++ b/esphome/components/sht4x/sht4x.h
@@ -36,7 +36,9 @@ class SHT4XComponent : public PollingComponent, public sensirion_common::Sensiri
   float duty_cycle_;
 
   void start_heater_();
+  void read_serial_number_();
   uint8_t heater_command_;
+  uint32_t serial_number_;
 
   sensor::Sensor *temp_sensor_{nullptr};
   sensor::Sensor *humidity_sensor_{nullptr};
diff --git a/esphome/components/wifi_info/wifi_info_text_sensor.cpp b/esphome/components/wifi_info/wifi_info_text_sensor.cpp
index e843ae8998..abd590b168 100644
--- a/esphome/components/wifi_info/wifi_info_text_sensor.cpp
+++ b/esphome/components/wifi_info/wifi_info_text_sensor.cpp
@@ -14,7 +14,7 @@ static constexpr size_t MAX_STATE_LENGTH = 255;
 
 void IPAddressWiFiInfo::setup() {
   wifi::global_wifi_component->add_on_ip_state_callback(
-      [this](network::IPAddresses ips, network::IPAddress dns1_ip, network::IPAddress dns2_ip) {
+      [this](const network::IPAddresses &ips, const network::IPAddress &dns1_ip, const network::IPAddress &dns2_ip) {
         this->state_callback_(ips);
       });
 }
@@ -24,7 +24,7 @@ void IPAddressWiFiInfo::dump_config() { LOG_TEXT_SENSOR("", "IP Address", this);
 void IPAddressWiFiInfo::state_callback_(const network::IPAddresses &ips) {
   this->publish_state(ips[0].str());
   uint8_t sensor = 0;
-  for (auto &ip : ips) {
+  for (const auto &ip : ips) {
     if (ip.is_set()) {
       if (this->ip_sensors_[sensor] != nullptr) {
         this->ip_sensors_[sensor]->publish_state(ip.str());
@@ -40,14 +40,14 @@ void IPAddressWiFiInfo::state_callback_(const network::IPAddresses &ips) {
 
 void DNSAddressWifiInfo::setup() {
   wifi::global_wifi_component->add_on_ip_state_callback(
-      [this](network::IPAddresses ips, network::IPAddress dns1_ip, network::IPAddress dns2_ip) {
+      [this](const network::IPAddresses &ips, const network::IPAddress &dns1_ip, const network::IPAddress &dns2_ip) {
         this->state_callback_(dns1_ip, dns2_ip);
       });
 }
 
 void DNSAddressWifiInfo::dump_config() { LOG_TEXT_SENSOR("", "DNS Address", this); }
 
-void DNSAddressWifiInfo::state_callback_(network::IPAddress dns1_ip, network::IPAddress dns2_ip) {
+void DNSAddressWifiInfo::state_callback_(const network::IPAddress &dns1_ip, const network::IPAddress &dns2_ip) {
   std::string dns_results = dns1_ip.str() + " " + dns2_ip.str();
   this->publish_state(dns_results);
 }
@@ -87,7 +87,7 @@ void ScanResultsWiFiInfo::state_callback_(const wifi::wifi_scan_vector_t<wifi::W
 
 void SSIDWiFiInfo::setup() {
   wifi::global_wifi_component->add_on_wifi_connect_state_callback(
-      [this](const std::string &ssid, wifi::bssid_t bssid) { this->state_callback_(ssid); });
+      [this](const std::string &ssid, const wifi::bssid_t &bssid) { this->state_callback_(ssid); });
 }
 
 void SSIDWiFiInfo::dump_config() { LOG_TEXT_SENSOR("", "SSID", this); }
@@ -100,12 +100,12 @@ void SSIDWiFiInfo::state_callback_(const std::string &ssid) { this->publish_stat
 
 void BSSIDWiFiInfo::setup() {
   wifi::global_wifi_component->add_on_wifi_connect_state_callback(
-      [this](const std::string &ssid, wifi::bssid_t bssid) { this->state_callback_(bssid); });
+      [this](const std::string &ssid, const wifi::bssid_t &bssid) { this->state_callback_(bssid); });
 }
 
 void BSSIDWiFiInfo::dump_config() { LOG_TEXT_SENSOR("", "BSSID", this); }
 
-void BSSIDWiFiInfo::state_callback_(wifi::bssid_t bssid) {
+void BSSIDWiFiInfo::state_callback_(const wifi::bssid_t &bssid) {
   char buf[18] = "unknown";
   if (mac_address_is_valid(bssid.data())) {
     format_mac_addr_upper(bssid.data(), buf);
diff --git a/esphome/components/wifi_info/wifi_info_text_sensor.h b/esphome/components/wifi_info/wifi_info_text_sensor.h
index df9cd4eb3f..12666b4059 100644
--- a/esphome/components/wifi_info/wifi_info_text_sensor.h
+++ b/esphome/components/wifi_info/wifi_info_text_sensor.h
@@ -26,7 +26,7 @@ class DNSAddressWifiInfo : public Component, public text_sensor::TextSensor {
   void dump_config() override;
 
  protected:
-  void state_callback_(network::IPAddress dns1_ip, network::IPAddress dns2_ip);
+  void state_callback_(const network::IPAddress &dns1_ip, const network::IPAddress &dns2_ip);
 };
 
 class ScanResultsWiFiInfo : public Component, public text_sensor::TextSensor {
@@ -54,7 +54,7 @@ class BSSIDWiFiInfo : public Component, public text_sensor::TextSensor {
   void dump_config() override;
 
  protected:
-  void state_callback_(wifi::bssid_t bssid);
+  void state_callback_(const wifi::bssid_t &bssid);
 };
 
 class MacAddressWifiInfo : public Component, public text_sensor::TextSensor {
diff --git a/requirements.txt b/requirements.txt
index df036eeccc..a5c919e95f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ platformio==6.1.18  # When updating platformio, also update /docker/Dockerfile
 esptool==5.1.0
 click==8.1.7
 esphome-dashboard==20251013.0
-aioesphomeapi==42.7.0
+aioesphomeapi==42.8.0
 zeroconf==0.148.0
 puremagic==1.30
 ruamel.yaml==0.18.16 # dashboard_import
diff --git a/tests/component_tests/binary_sensor/test_binary_sensor.py b/tests/component_tests/binary_sensor/test_binary_sensor.py
index 32d74027ba..86e0705023 100644
--- a/tests/component_tests/binary_sensor/test_binary_sensor.py
+++ b/tests/component_tests/binary_sensor/test_binary_sensor.py
@@ -29,7 +29,7 @@ def test_binary_sensor_sets_mandatory_fields(generate_main):
     )
 
     # Then
-    assert 'bs_1->set_name("test bs1");' in main_cpp
+    assert 'bs_1->set_name_and_object_id("test bs1", "test_bs1");' in main_cpp
     assert "bs_1->set_pin(" in main_cpp
 
 
diff --git a/tests/component_tests/button/test_button.py b/tests/component_tests/button/test_button.py
index 512ef42b44..b21665288c 100644
--- a/tests/component_tests/button/test_button.py
+++ b/tests/component_tests/button/test_button.py
@@ -26,7 +26,7 @@ def test_button_sets_mandatory_fields(generate_main):
     main_cpp = generate_main("tests/component_tests/button/test_button.yaml")
 
     # Then
-    assert 'wol_1->set_name("wol_test_1");' in main_cpp
+    assert 'wol_1->set_name_and_object_id("wol_test_1", "wol_test_1");' in main_cpp
     assert "wol_2->set_macaddr(18, 52, 86, 120, 144, 171);" in main_cpp
 
 
diff --git a/tests/component_tests/text/test_text.py b/tests/component_tests/text/test_text.py
index ffc0fd780a..56dee205b4 100644
--- a/tests/component_tests/text/test_text.py
+++ b/tests/component_tests/text/test_text.py
@@ -27,7 +27,7 @@ def test_text_sets_mandatory_fields(generate_main):
     main_cpp = generate_main("tests/component_tests/text/test_text.yaml")
 
     # Then
-    assert 'it_1->set_name("test 1 text");' in main_cpp
+    assert 'it_1->set_name_and_object_id("test 1 text", "test_1_text");' in main_cpp
 
 
 def test_text_config_value_internal_set(generate_main):
diff --git a/tests/component_tests/text_sensor/test_text_sensor.py b/tests/component_tests/text_sensor/test_text_sensor.py
index 1c4ef6633d..934ee67cef 100644
--- a/tests/component_tests/text_sensor/test_text_sensor.py
+++ b/tests/component_tests/text_sensor/test_text_sensor.py
@@ -25,9 +25,18 @@ def test_text_sensor_sets_mandatory_fields(generate_main):
     main_cpp = generate_main("tests/component_tests/text_sensor/test_text_sensor.yaml")
 
     # Then
-    assert 'ts_1->set_name("Template Text Sensor 1");' in main_cpp
-    assert 'ts_2->set_name("Template Text Sensor 2");' in main_cpp
-    assert 'ts_3->set_name("Template Text Sensor 3");' in main_cpp
+    assert (
+        'ts_1->set_name_and_object_id("Template Text Sensor 1", "template_text_sensor_1");'
+        in main_cpp
+    )
+    assert (
+        'ts_2->set_name_and_object_id("Template Text Sensor 2", "template_text_sensor_2");'
+        in main_cpp
+    )
+    assert (
+        'ts_3->set_name_and_object_id("Template Text Sensor 3", "template_text_sensor_3");'
+        in main_cpp
+    )
 
 
 def test_text_sensor_config_value_internal_set(generate_main):
diff --git a/tests/components/lvgl/lvgl-package.yaml b/tests/components/lvgl/lvgl-package.yaml
index 5839643638..30866a603c 100644
--- a/tests/components/lvgl/lvgl-package.yaml
+++ b/tests/components/lvgl/lvgl-package.yaml
@@ -537,6 +537,9 @@ lvgl:
         - tileview:
             id: tileview_id
             scrollbar_mode: active
+            scroll_dir: all
+            scroll_elastic: true
+            scroll_momentum: true
             on_value:
               then:
                 - if:
@@ -546,7 +549,10 @@ lvgl:
                       - logger.log: "tile 1 is now showing"
             tiles:
               - id: tile_1
+                scroll_snap_y: center
+                scroll_snap_x: start
                 layout: vertical
+                pad_all: 6px
                 row: 0
                 column: 0
                 dir: ALL
@@ -781,6 +787,18 @@ lvgl:
                 arc_color: 0xFFFF00
               focused:
                 arc_color: 0x808080
+            on_click:
+              then:
+                - lvgl.arc.update:
+                    id: lv_arc_1
+                    value: !lambda return (int)((float)rand() / RAND_MAX * 100);
+                    min_value: !lambda return (int)((float)rand() / RAND_MAX * 100);
+                    max_value: !lambda return (int)((float)rand() / RAND_MAX * 100);
+                    start_angle: !lambda return (int)((float)rand() / RAND_MAX * 100);
+                    end_angle: !lambda return (int)((float)rand() / RAND_MAX * 100);
+                    rotation: !lambda return (int)((float)rand() / RAND_MAX * 100);
+                    change_rate: !lambda return (uint)((float)rand() / RAND_MAX * 100);
+                    mode: NORMAL
         - bar:
             id: bar_id
             align: top_mid
@@ -881,6 +899,7 @@ lvgl:
                   grid_columns: [40, fr(1), fr(1)]
                   pad_row: 6px
                   pad_column: 0
+                  multiple_widgets_per_cell: true
                 widgets:
                   - image:
                       grid_cell_row_pos: 0
@@ -905,6 +924,10 @@ lvgl:
                       grid_cell_row_pos: 1
                       grid_cell_column_pos: 0
                       text: "Grid cell 1/0"
+                  - label:
+                      grid_cell_row_pos: 1
+                      grid_cell_column_pos: 0
+                      text: "Duplicate for 1/0"
                   - label:
                       styles: bdr_style
                       grid_cell_row_pos: 1
@@ -1027,6 +1050,7 @@ lvgl:
                                 opa: 0%
     - id: page3
       layout: Horizontal
+      pad_all: 6px
       widgets:
         - keyboard:
             id: lv_keyboard
diff --git a/tests/integration/fixtures/script_wait_on_boot.yaml b/tests/integration/fixtures/script_wait_on_boot.yaml
new file mode 100644
index 0000000000..8736b02294
--- /dev/null
+++ b/tests/integration/fixtures/script_wait_on_boot.yaml
@@ -0,0 +1,54 @@
+esphome:
+  name: test-script-wait-on-boot
+  on_boot:
+    # Use default priority (600.0) which is same as ScriptWaitAction's setup priority
+    # This tests the race condition where on_boot runs before ScriptWaitAction::setup()
+    then:
+      - logger.log: "=== on_boot: Starting boot sequence ==="
+      - script.execute: show_start_page
+      - script.wait: show_start_page
+      - logger.log: "=== on_boot: First script completed, starting second ==="
+      - script.execute: flip_thru_pages
+      - script.wait: flip_thru_pages
+      - logger.log: "=== on_boot: All boot scripts completed successfully ==="
+
+host:
+
+api:
+  actions:
+    # Manual trigger for additional testing
+    - action: test_script_wait
+      then:
+        - logger.log: "=== Manual test: Starting ==="
+        - script.execute: show_start_page
+        - script.wait: show_start_page
+        - logger.log: "=== Manual test: First script completed ==="
+        - script.execute: flip_thru_pages
+        - script.wait: flip_thru_pages
+        - logger.log: "=== Manual test: All completed ==="
+
+logger:
+  level: DEBUG
+
+script:
+  # First script - simulates display initialization
+  - id: show_start_page
+    mode: single
+    then:
+      - logger.log: "show_start_page: Starting"
+      - delay: 100ms
+      - logger.log: "show_start_page: After delay 1"
+      - delay: 100ms
+      - logger.log: "show_start_page: Completed"
+
+  # Second script - simulates page flip sequence
+  - id: flip_thru_pages
+    mode: single
+    then:
+      - logger.log: "flip_thru_pages: Starting"
+      - delay: 50ms
+      - logger.log: "flip_thru_pages: Page 1"
+      - delay: 50ms
+      - logger.log: "flip_thru_pages: Page 2"
+      - delay: 50ms
+      - logger.log: "flip_thru_pages: Completed"
diff --git a/tests/integration/test_script_wait_on_boot.py b/tests/integration/test_script_wait_on_boot.py
new file mode 100644
index 0000000000..478090f782
--- /dev/null
+++ b/tests/integration/test_script_wait_on_boot.py
@@ -0,0 +1,130 @@
+"""Integration test for script.wait during on_boot (issue #12043).
+
+This test verifies that script.wait works correctly when triggered from on_boot.
+The issue was that ScriptWaitAction::setup() unconditionally disabled the loop,
+even if play_complex() had already been called (from an on_boot trigger at the
+same priority level) and enabled it.
+
+The race condition occurs because:
+1. on_boot's default priority is 600.0 (setup_priority::DATA)
+2. ScriptWaitAction's default setup priority is also DATA (600.0)
+3. When they have the same priority, if on_boot runs first and triggers a script,
+   ScriptWaitAction::play_complex() enables the loop
+4. Then ScriptWaitAction::setup() runs and unconditionally disables the loop
+5. The wait never completes because the loop is disabled
+
+The fix adds a conditional check (like WaitUntilAction has) to only disable the
+loop in setup() if num_running_ is 0.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import re
+
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+
+@pytest.mark.asyncio
+async def test_script_wait_on_boot(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Test that script.wait works correctly when triggered from on_boot.
+
+    This reproduces issue #12043 where script.wait would hang forever when
+    triggered from on_boot due to a race condition in ScriptWaitAction::setup().
+    """
+    test_complete = asyncio.Event()
+
+    # Track progress through the boot sequence
+    boot_started = False
+    first_script_started = False
+    first_script_completed = False
+    first_wait_returned = False
+    second_script_started = False
+    second_script_completed = False
+    all_completed = False
+
+    # Patterns for boot sequence logs
+    boot_start_pattern = re.compile(r"on_boot: Starting boot sequence")
+    show_start_pattern = re.compile(r"show_start_page: Starting")
+    show_complete_pattern = re.compile(r"show_start_page: Completed")
+    first_wait_pattern = re.compile(r"on_boot: First script completed")
+    flip_start_pattern = re.compile(r"flip_thru_pages: Starting")
+    flip_complete_pattern = re.compile(r"flip_thru_pages: Completed")
+    all_complete_pattern = re.compile(r"on_boot: All boot scripts completed")
+
+    def check_output(line: str) -> None:
+        """Check log output for boot sequence progress."""
+        nonlocal boot_started, first_script_started, first_script_completed
+        nonlocal first_wait_returned, second_script_started, second_script_completed
+        nonlocal all_completed
+
+        if boot_start_pattern.search(line):
+            boot_started = True
+        elif show_start_pattern.search(line):
+            first_script_started = True
+        elif show_complete_pattern.search(line):
+            first_script_completed = True
+        elif first_wait_pattern.search(line):
+            first_wait_returned = True
+        elif flip_start_pattern.search(line):
+            second_script_started = True
+        elif flip_complete_pattern.search(line):
+            second_script_completed = True
+        elif all_complete_pattern.search(line):
+            all_completed = True
+            test_complete.set()
+
+    async with (
+        run_compiled(yaml_config, line_callback=check_output),
+        api_client_connected() as client,
+    ):
+        # Verify device info
+        device_info = await client.device_info()
+        assert device_info is not None
+        assert device_info.name == "test-script-wait-on-boot"
+
+        # Wait for on_boot sequence to complete
+        # The boot sequence should complete automatically
+        # Timeout is generous to allow for delays in the scripts
+        try:
+            await asyncio.wait_for(test_complete.wait(), timeout=5.0)
+        except TimeoutError:
+            # Build a detailed error message showing where the boot sequence got stuck
+            progress = []
+            if boot_started:
+                progress.append("boot started")
+            if first_script_started:
+                progress.append("show_start_page started")
+            if first_script_completed:
+                progress.append("show_start_page completed")
+            if first_wait_returned:
+                progress.append("first script.wait returned")
+            if second_script_started:
+                progress.append("flip_thru_pages started")
+            if second_script_completed:
+                progress.append("flip_thru_pages completed")
+
+            if not first_wait_returned and first_script_completed:
+                pytest.fail(
+                    f"Test timed out - script.wait hung after show_start_page completed! "
+                    f"This is the issue #12043 bug. Progress: {', '.join(progress)}"
+                )
+            else:
+                pytest.fail(
+                    f"Test timed out. Progress: {', '.join(progress) if progress else 'none'}"
+                )
+
+        # Verify the complete boot sequence executed in order
+        assert boot_started, "on_boot did not start"
+        assert first_script_started, "show_start_page did not start"
+        assert first_script_completed, "show_start_page did not complete"
+        assert first_wait_returned, "First script.wait did not return"
+        assert second_script_started, "flip_thru_pages did not start"
+        assert second_script_completed, "flip_thru_pages did not complete"
+        assert all_completed, "Boot sequence did not complete"
diff --git a/tests/unit_tests/core/test_entity_helpers.py b/tests/unit_tests/core/test_entity_helpers.py
index 9ba5367413..01de0f27f9 100644
--- a/tests/unit_tests/core/test_entity_helpers.py
+++ b/tests/unit_tests/core/test_entity_helpers.py
@@ -27,8 +27,13 @@ from esphome.helpers import sanitize, snake_case
 
 from .common import load_config_from_fixture
 
-# Pre-compiled regex pattern for extracting object IDs from expressions
+# Pre-compiled regex patterns for extracting object IDs from expressions
+# Matches both old format: .set_object_id("obj_id")
+# and new format: .set_name_and_object_id("name", "obj_id")
 OBJECT_ID_PATTERN = re.compile(r'\.set_object_id\(["\'](.*?)["\']\)')
+COMBINED_PATTERN = re.compile(
+    r'\.set_name_and_object_id\(["\'].*?["\']\s*,\s*["\'](.*?)["\']\)'
+)
 
 FIXTURES_DIR = Path(__file__).parent.parent / "fixtures" / "core" / "entity_helpers"
 
@@ -273,8 +278,10 @@ def setup_test_environment() -> Generator[list[str], None, None]:
 def extract_object_id_from_expressions(expressions: list[str]) -> str | None:
     """Extract the object ID that was set from the generated expressions."""
     for expr in expressions:
-        # Look for set_object_id calls with regex to handle various formats
-        # Matches: var.set_object_id("temperature_2") or var.set_object_id('temperature_2')
+        # First try new combined format: .set_name_and_object_id("name", "obj_id")
+        if match := COMBINED_PATTERN.search(expr):
+            return match.group(1)
+        # Fall back to old format: .set_object_id("obj_id")
         if match := OBJECT_ID_PATTERN.search(expr):
             return match.group(1)
     return None