diff --git a/esphome/components/cc1101/__init__.py b/esphome/components/cc1101/__init__.py
index 27092908621..0feb384ac23 100644
--- a/esphome/components/cc1101/__init__.py
+++ b/esphome/components/cc1101/__init__.py
@@ -423,11 +423,10 @@ def _register_setter_actions():
             var = cg.new_Pvariable(action_id, template_arg)
             await cg.register_parented(var, config[CONF_ID])
             data = config[CONF_VALUE]
-            if cg.is_template(data):
-                templ_ = await cg.templatable(data, args, _type)
-                cg.add(getattr(var, _setter)(templ_))
-            else:
-                cg.add(getattr(var, _setter)(_map[data] if _map else data))
+            if _map and not cg.is_template(data):
+                data = _map[data]
+            templ_ = await cg.templatable(data, args, _type)
+            cg.add(getattr(var, _setter)(templ_))
             return var
 
         automation.register_action(
diff --git a/esphome/components/datetime/__init__.py b/esphome/components/datetime/__init__.py
index 90835624bf1..895ac4e243e 100644
--- a/esphome/components/datetime/__init__.py
+++ b/esphome/components/datetime/__init__.py
@@ -204,7 +204,8 @@ async def datetime_date_set_to_code(config, action_id, template_arg, args):
             ("month", date_config[CONF_MONTH]),
             ("year", date_config[CONF_YEAR]),
         )
-        cg.add(action_var.set_date(date_struct))
+        template_ = await cg.templatable(date_struct, args, cg.ESPTime)
+        cg.add(action_var.set_date(template_))
     return action_var
 
 
@@ -236,7 +237,8 @@ async def datetime_time_set_to_code(config, action_id, template_arg, args):
             ("minute", time_config[CONF_MINUTE]),
             ("hour", time_config[CONF_HOUR]),
         )
-        cg.add(action_var.set_time(time_struct))
+        template_ = await cg.templatable(time_struct, args, cg.ESPTime)
+        cg.add(action_var.set_time(template_))
     return action_var
 
 
@@ -271,5 +273,6 @@ async def datetime_datetime_set_to_code(config, action_id, template_arg, args):
             ("month", datetime_config[CONF_MONTH]),
             ("year", datetime_config[CONF_YEAR]),
         )
-        cg.add(action_var.set_datetime(datetime_struct))
+        template_ = await cg.templatable(datetime_struct, args, cg.ESPTime)
+        cg.add(action_var.set_datetime(template_))
     return action_var
diff --git a/esphome/components/display/__init__.py b/esphome/components/display/__init__.py
index 67d76a59d9d..744b5d16c49 100644
--- a/esphome/components/display/__init__.py
+++ b/esphome/components/display/__init__.py
@@ -207,7 +207,8 @@ async def display_page_show_to_code(config, action_id, template_arg, args):
         cg.add(var.set_page(template_))
     else:
         paren = await cg.get_variable(config[CONF_ID])
-        cg.add(var.set_page(paren))
+        template_ = await cg.templatable(paren, args, DisplayPagePtr)
+        cg.add(var.set_page(template_))
     return var
 
 
diff --git a/esphome/components/globals/__init__.py b/esphome/components/globals/__init__.py
index c0694093606..fe83b1ea7c3 100644
--- a/esphome/components/globals/__init__.py
+++ b/esphome/components/globals/__init__.py
@@ -9,7 +9,6 @@ from esphome.const import (
     CONF_VALUE,
 )
 from esphome.core import CoroPriority, coroutine_with_priority
-from esphome.cpp_generator import LambdaExpression
 from esphome.types import ConfigType
 
 CODEOWNERS = ["@esphome/core"]
@@ -109,16 +108,8 @@ async def globals_set_to_code(config, action_id, template_arg, args):
     full_id, paren = await cg.get_variable_with_full_id(config[CONF_ID])
     template_arg = cg.TemplateArguments(full_id.type, *template_arg)
     var = cg.new_Pvariable(action_id, template_arg, paren)
-    value = config[CONF_VALUE]
-    if cg.is_template(value):
-        templ = await cg.templatable(value, args, None, to_exp=cg.RawExpression)
-    else:
-        # Wrap raw constant in a stateless lambda for TemplatableFn storage.
-        # Use RawExpression for the value since T is a template parameter
-        # (the C++ compiler handles the type deduction).
-        raw_value = cg.RawExpression(value)
-        templ = LambdaExpression(
-            f"return {cg.safe_exp(raw_value)};", args, capture="", return_type=None
-        )
+    templ = await cg.templatable(
+        config[CONF_VALUE], args, None, to_exp=cg.RawExpression
+    )
     cg.add(var.set_value(templ))
     return var
diff --git a/esphome/components/lightwaverf/__init__.py b/esphome/components/lightwaverf/__init__.py
index 46c400cb0e4..76eabc2b712 100644
--- a/esphome/components/lightwaverf/__init__.py
+++ b/esphome/components/lightwaverf/__init__.py
@@ -61,15 +61,13 @@ async def send_raw_to_code(config, action_id, template_arg, args):
     paren = await cg.get_variable(config[CONF_ID])
     var = cg.new_Pvariable(action_id, template_arg, paren)
 
-    repeats = await cg.templatable(config[CONF_REPEAT], args, int)
-    inverted = await cg.templatable(config[CONF_INVERTED], args, bool)
-    pulse_length = await cg.templatable(config[CONF_PULSE_LENGTH], args, int)
-    code = config[CONF_CODE]
-
-    cg.add(var.set_repeats(repeats))
-    cg.add(var.set_inverted(inverted))
-    cg.add(var.set_pulse_length(pulse_length))
-    cg.add(var.set_data(code))
+    template_ = await cg.templatable(config[CONF_REPEAT], args, cg.int_)
+    cg.add(var.set_repeat(template_))
+    template_ = await cg.templatable(config[CONF_INVERTED], args, cg.int_)
+    cg.add(var.set_inverted(template_))
+    template_ = await cg.templatable(config[CONF_PULSE_LENGTH], args, cg.int_)
+    cg.add(var.set_pulse_length(template_))
+    cg.add(var.set_code(config[CONF_CODE]))
     return var
 
 
diff --git a/esphome/components/lightwaverf/lightwaverf.h b/esphome/components/lightwaverf/lightwaverf.h
index ee4e91e9d1d..6210e6b5d47 100644
--- a/esphome/components/lightwaverf/lightwaverf.h
+++ b/esphome/components/lightwaverf/lightwaverf.h
@@ -45,11 +45,7 @@ template<typename... Ts> class SendRawAction : public Action<Ts...> {
   TEMPLATABLE_VALUE(int, inverted);
   TEMPLATABLE_VALUE(int, pulse_length);
   TEMPLATABLE_VALUE(std::vector<uint8_t>, code);
-
-  void set_repeats(const int &data) { repeat_ = data; }
-  void set_inverted(const int &data) { inverted_ = data; }
-  void set_pulse_length(const int &data) { pulse_length_ = data; }
-  void set_data(const std::vector<uint8_t> &data) { code_ = data; }
+  void set_code(std::initializer_list<uint8_t> data) { this->code_ = std::vector<uint8_t>(data); }
 
   void play(const Ts &...x) {
     int repeats = this->repeat_.value(x...);
diff --git a/esphome/components/max7219digit/display.py b/esphome/components/max7219digit/display.py
index eb751b995d1..df2423b0d0e 100644
--- a/esphome/components/max7219digit/display.py
+++ b/esphome/components/max7219digit/display.py
@@ -147,7 +147,8 @@ MAX7219_ON_ACTION_SCHEMA = automation.maybe_simple_id(
 async def max7219digit_invert_to_code(config, action_id, template_arg, args):
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
-    cg.add(var.set_state(config[CONF_STATE]))
+    template_ = await cg.templatable(config[CONF_STATE], args, cg.bool_)
+    cg.add(var.set_state(template_))
     return var
 
 
@@ -166,7 +167,8 @@ async def max7219digit_invert_to_code(config, action_id, template_arg, args):
 async def max7219digit_visible_to_code(config, action_id, template_arg, args):
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
-    cg.add(var.set_state(config[CONF_STATE]))
+    template_ = await cg.templatable(config[CONF_STATE], args, cg.bool_)
+    cg.add(var.set_state(template_))
     return var
 
 
@@ -185,7 +187,8 @@ async def max7219digit_visible_to_code(config, action_id, template_arg, args):
 async def max7219digit_reverse_to_code(config, action_id, template_arg, args):
     var = cg.new_Pvariable(action_id, template_arg)
     await cg.register_parented(var, config[CONF_ID])
-    cg.add(var.set_state(config[CONF_STATE]))
+    template_ = await cg.templatable(config[CONF_STATE], args, cg.bool_)
+    cg.add(var.set_state(template_))
     return var
 
 
diff --git a/esphome/components/number/__init__.py b/esphome/components/number/__init__.py
index 9fbaff68601..c8441002586 100644
--- a/esphome/components/number/__init__.py
+++ b/esphome/components/number/__init__.py
@@ -448,7 +448,11 @@ async def number_to_to_code(config, action_id, template_arg, args):
             template_ = await cg.templatable(cycle, args, bool)
             cg.add(var.set_cycle(template_))
     if (mode := config.get(CONF_MODE)) is not None:
-        cg.add(var.set_operation(NUMBER_OPERATION_OPTIONS[mode]))
+        template_ = await cg.templatable(
+            NUMBER_OPERATION_OPTIONS[mode], args, NumberOperation
+        )
+        cg.add(var.set_operation(template_))
         if (cycle := config.get(CONF_CYCLE)) is not None:
-            cg.add(var.set_cycle(cycle))
+            template_ = await cg.templatable(cycle, args, cg.bool_)
+            cg.add(var.set_cycle(template_))
     return var
diff --git a/esphome/components/select/__init__.py b/esphome/components/select/__init__.py
index b2c17f59ac1..8c7c8f00fa1 100644
--- a/esphome/components/select/__init__.py
+++ b/esphome/components/select/__init__.py
@@ -282,7 +282,11 @@ async def select_operation_to_code(config, action_id, template_arg, args):
             template_ = await cg.templatable(cycle, args, bool)
             cg.add(var.set_cycle(template_))
     if (mode := config.get(CONF_MODE)) is not None:
-        cg.add(var.set_operation(SELECT_OPERATION_OPTIONS[mode]))
+        template_ = await cg.templatable(
+            SELECT_OPERATION_OPTIONS[mode], args, SelectOperation
+        )
+        cg.add(var.set_operation(template_))
         if (cycle := config.get(CONF_CYCLE)) is not None:
-            cg.add(var.set_cycle(cycle))
+            template_ = await cg.templatable(cycle, args, cg.bool_)
+            cg.add(var.set_cycle(template_))
     return var
diff --git a/esphome/components/speaker/media_player/__init__.py b/esphome/components/speaker/media_player/__init__.py
index b16f882cbad..320e96c8979 100644
--- a/esphome/components/speaker/media_player/__init__.py
+++ b/esphome/components/speaker/media_player/__init__.py
@@ -516,7 +516,8 @@ async def play_on_device_media_media_action(config, action_id, template_arg, arg
     announcement = await cg.templatable(config[CONF_ANNOUNCEMENT], args, cg.bool_)
     enqueue = await cg.templatable(config[CONF_ENQUEUE], args, cg.bool_)
 
-    cg.add(var.set_audio_file(media_file))
+    template_ = await cg.templatable(media_file, args, audio.AudioFile.operator("ptr"))
+    cg.add(var.set_audio_file(template_))
     cg.add(var.set_announcement(announcement))
     cg.add(var.set_enqueue(enqueue))
     return var
diff --git a/esphome/core/automation.h b/esphome/core/automation.h
index 7d5981c3b85..eb270bfee26 100644
--- a/esphome/core/automation.h
+++ b/esphome/core/automation.h
@@ -40,6 +40,7 @@ template<int... S> struct gens<0, S...> { using type = seq<S...>; };
 template<typename T, typename... X> class TemplatableFn {
  public:
   TemplatableFn() = default;
+  TemplatableFn(std::nullptr_t) = delete;
 
   // Exact return type match — direct function pointer storage
   template<typename F> TemplatableFn(F f) requires std::convertible_to<F, T (*)(X...)> : f_(f) {}
@@ -80,11 +81,12 @@ template<typename T, typename... X> class TemplatableFn {
 // Forward declaration for TemplatableValue (string specialization needs it)
 template<typename T, typename... X> class TemplatableValue;
 
-/// Selects TemplatableFn (4 bytes) for non-string types, TemplatableValue (8 bytes) for std::string.
-/// std::string needs TemplatableValue for const char*, __FlashStringHelper*, and PROGMEM support.
+/// Selects TemplatableFn (4 bytes) for trivially copyable types, TemplatableValue (8 bytes) otherwise.
+/// Non-trivial types (std::string, std::vector<uint8_t>, etc.) need TemplatableValue for raw value
+/// storage, PROGMEM/FlashStringHelper support (strings), and proper copy/move/destruction.
 template<typename T, typename... X>
 using TemplatableStorage =
-    std::conditional_t<std::same_as<T, std::string>, TemplatableValue<T, X...>, TemplatableFn<T, X...>>;
+    std::conditional_t<std::is_trivially_copyable_v<T>, TemplatableFn<T, X...>, TemplatableValue<T, X...>>;
 
 #define TEMPLATABLE_VALUE_(type, name) \
  protected: \
@@ -101,14 +103,17 @@ using TemplatableStorage =
 template<typename T, typename... X> class TemplatableValue {
  public:
   TemplatableValue() = default;
+  TemplatableValue(std::nullptr_t) = delete;
 
   // Accept raw constants
   template<typename V> TemplatableValue(V value) requires(!std::invocable<V, X...>) : tag_(VALUE) {
-    new (&this->value_) T(static_cast<T>(std::move(value)));
+    new (&this->storage_.value_) T(static_cast<T>(std::move(value)));
   }
 
   // Accept stateless lambdas (convertible to function pointer)
-  template<typename F> TemplatableValue(F f) requires std::convertible_to<F, T (*)(X...)> : tag_(FN) { this->f_ = f; }
+  template<typename F> TemplatableValue(F f) requires std::convertible_to<F, T (*)(X...)> : tag_(FN) {
+    this->storage_.f_ = f;
+  }
 
   // Convertible return type (e.g., int -> uint8_t) — casting trampoline
   template<typename F>
@@ -116,7 +121,7 @@ template<typename T, typename... X> class TemplatableValue {
                    "codegen")]] TemplatableValue(F) requires(!std::convertible_to<F, T (*)(X...)>) &&
       std::invocable<F, X...> &&std::convertible_to<std::invoke_result_t<F, X...>, T> &&std::is_empty_v<F>
           &&std::default_initializable<F> : tag_(FN) {
-    this->f_ = [](X... x) -> T { return static_cast<T>(F{}(x...)); };
+    this->storage_.f_ = [](X... x) -> T { return static_cast<T>(F{}(x...)); };
   }
 
   // Reject any callable that didn't match the above
@@ -128,18 +133,18 @@ template<typename T, typename... X> class TemplatableValue {
 
   TemplatableValue(const TemplatableValue &other) : tag_(other.tag_) {
     if (this->tag_ == VALUE) {
-      new (&this->value_) T(other.value_);
+      new (&this->storage_.value_) T(other.storage_.value_);
     } else if (this->tag_ == FN) {
-      this->f_ = other.f_;
+      this->storage_.f_ = other.storage_.f_;
     }
   }
 
   TemplatableValue(TemplatableValue &&other) noexcept : tag_(other.tag_) {
     if (this->tag_ == VALUE) {
-      new (&this->value_) T(std::move(other.value_));
+      new (&this->storage_.value_) T(std::move(other.storage_.value_));
       other.destroy_();
     } else if (this->tag_ == FN) {
-      this->f_ = other.f_;
+      this->storage_.f_ = other.storage_.f_;
     }
     other.tag_ = NONE;
   }
@@ -149,9 +154,9 @@ template<typename T, typename... X> class TemplatableValue {
       this->destroy_();
       this->tag_ = other.tag_;
       if (this->tag_ == VALUE) {
-        new (&this->value_) T(other.value_);
+        new (&this->storage_.value_) T(other.storage_.value_);
       } else if (this->tag_ == FN) {
-        this->f_ = other.f_;
+        this->storage_.f_ = other.storage_.f_;
       }
     }
     return *this;
@@ -162,10 +167,10 @@ template<typename T, typename... X> class TemplatableValue {
       this->destroy_();
       this->tag_ = other.tag_;
       if (this->tag_ == VALUE) {
-        new (&this->value_) T(std::move(other.value_));
+        new (&this->storage_.value_) T(std::move(other.storage_.value_));
         other.destroy_();
       } else if (this->tag_ == FN) {
-        this->f_ = other.f_;
+        this->storage_.f_ = other.storage_.f_;
       }
       other.tag_ = NONE;
     }
@@ -178,9 +183,9 @@ template<typename T, typename... X> class TemplatableValue {
 
   T value(X... x) const {
     if (this->tag_ == FN)
-      return this->f_(x...);
+      return this->storage_.f_(x...);
     if (this->tag_ == VALUE)
-      return this->value_;
+      return this->storage_.value_;
     return T{};
   }
 
@@ -200,15 +205,20 @@ template<typename T, typename... X> class TemplatableValue {
   void destroy_() {
     if constexpr (!std::is_trivially_destructible_v<T>) {
       if (this->tag_ == VALUE)
-        this->value_.~T();
+        this->storage_.value_.~T();
     }
   }
 
   enum Tag : uint8_t { NONE, VALUE, FN } tag_{NONE};
-  union {
+  // Union with explicit ctor/dtor to support non-trivially-constructible/destructible T
+  // (e.g., std::vector<uint8_t>). Lifetime of value_ is managed externally via
+  // placement new and destroy_().
+  union Storage {
+    constexpr Storage() : f_(nullptr) {}
+    constexpr ~Storage() {}
     T value_;
     T (*f_)(X...);
-  };
+  } storage_;
 };
 
 /// Specialization for std::string: supports VALUE, STATIC_STRING, FLASH_STRING,
diff --git a/esphome/cpp_generator.py b/esphome/cpp_generator.py
index c41171257b9..814e37e02cb 100644
--- a/esphome/cpp_generator.py
+++ b/esphome/cpp_generator.py
@@ -848,9 +848,11 @@ async def templatable(
         # Automatically wrap static strings in ESPHOME_F() for PROGMEM storage on ESP8266.
         # On other platforms ESPHOME_F() is a no-op returning const char*.
         return FlashStringLiteral(value)
-    # For non-string types, wrap constants in stateless lambdas so that
-    # TemplatableFn (used by TEMPLATABLE_VALUE macro) stores them as function pointers.
-    if output_type is not None and output_type is not std_string:
+    # Wrap non-string constants in stateless lambdas so that TemplatableFn
+    # (used by TEMPLATABLE_VALUE macro) stores them as function pointers.
+    # When output_type is None, the lambda omits the return type annotation
+    # and the C++ compiler deduces it (used by globals where T is unknown).
+    if output_type is not std_string:
         return LambdaExpression(
             f"return {safe_exp(value)};",
             args,
diff --git a/tests/unit_tests/test_cpp_generator.py b/tests/unit_tests/test_cpp_generator.py
index 81ae586e23b..c75851df0cb 100644
--- a/tests/unit_tests/test_cpp_generator.py
+++ b/tests/unit_tests/test_cpp_generator.py
@@ -652,11 +652,11 @@ async def test_templatable__empty_string_with_std_string() -> None:
 
 @pytest.mark.asyncio
 async def test_templatable__string_with_none_output_type() -> None:
-    """Static string with output_type=None returns raw string (no wrapping)."""
+    """Static string with output_type=None returns stateless lambda (no return type)."""
     result = await cg.templatable("hello", [], None)
 
-    assert isinstance(result, str)
-    assert result == "hello"
+    assert isinstance(result, cg.LambdaExpression)
+    assert result.capture == ""
 
 
 @pytest.mark.asyncio
@@ -678,10 +678,11 @@ async def test_templatable__string_with_non_string_output_type() -> None:
 
 @pytest.mark.asyncio
 async def test_templatable__with_to_exp_callable() -> None:
-    """When to_exp is provided, it is applied to non-template values."""
+    """When to_exp is provided with output_type=None, result is lambda-wrapped."""
     result = await cg.templatable(42, [], None, to_exp=lambda x: x * 2)
 
-    assert result == 84
+    assert isinstance(result, cg.LambdaExpression)
+    assert result.capture == ""
 
 
 @pytest.mark.asyncio
@@ -695,11 +696,12 @@ async def test_templatable__with_to_exp_callable_and_output_type() -> None:
 
 @pytest.mark.asyncio
 async def test_templatable__with_to_exp_dict() -> None:
-    """When to_exp is a dict, value is looked up."""
+    """When to_exp is a dict, value is looked up and lambda-wrapped."""
     mapping: dict[str, int] = {"on": 1, "off": 0}
     result = await cg.templatable("on", [], None, to_exp=mapping)
 
-    assert result == 1
+    assert isinstance(result, cg.LambdaExpression)
+    assert result.capture == ""
 
 
 @pytest.mark.asyncio