fix(lint): apply Python 3.14 ruff rules and update HA minimum version

Add UP037 to ruff ignore list to preserve quoted TYPE_CHECKING forward
references (PEP 649 lazy eval breaks get_type_hints() at runtime for
TYPE_CHECKING-guarded imports).

Move datetime imports into TYPE_CHECKING blocks in sensor/calculators
timing.py and trend.py (TC003, type-only usage confirmed).

Apply PEP 758 parenthesis-free except clauses across 7 files via
ruff format with target-version=py314.

Update hacs.json minimum HA version to 2026.4.0, the first HA release
requiring Python 3.14.

Impact: Linter config now correctly handles Python 3.14 semantics.
Users need HA >= 2026.4 (Python 3.14) to use this integration.

custom_components/tibber_prices/config_flow_handlers/user_flow.py

@@ -458,7 +458,7 @@ class TibberPricesConfigFlowHandler(ConfigFlow, domain=DOMAIN):
                 valid_to_dt = datetime.fromisoformat(valid_to)
                 if valid_to_dt < datetime.now(valid_to_dt.tzinfo):
                     return "expired"
-            except (ValueError, AttributeError):
+            except ValueError, AttributeError:
                 pass  # If parsing fails, continue with other checks
 
         # Check validFrom (contract start date)
@@ -468,7 +468,7 @@ class TibberPricesConfigFlowHandler(ConfigFlow, domain=DOMAIN):
                 valid_from_dt = datetime.fromisoformat(valid_from)
                 if valid_from_dt > datetime.now(valid_from_dt.tzinfo):
                     return "future"
-            except (ValueError, AttributeError):
+            except ValueError, AttributeError:
                 pass  # If parsing fails, assume active
 
         return "active"

custom_components/tibber_prices/coordinator/periods.py

@@ -205,7 +205,7 @@ class TibberPricesPeriodCalculator:
         # Internal calculations always use positive values with reverse_sort flag
         try:
             flex = abs(float(flex)) / 100  # Always positive internally
-        except (TypeError, ValueError):
+        except TypeError, ValueError:
             flex = (
                 abs(_const.DEFAULT_BEST_PRICE_FLEX) / 100
                 if not reverse_sort

custom_components/tibber_prices/entity.py

@@ -134,7 +134,7 @@ class TibberPricesEntity(CoordinatorEntity[TibberPricesDataUpdateCoordinator]):
                     home_name = f"{home_name}, {city}"
             else:
                 home_name = "Tibber Home"
-        except (KeyError, IndexError, TypeError):
+        except KeyError, IndexError, TypeError:
             return "Tibber Home", None
         else:
             return home_name, home_type

custom_components/tibber_prices/sensor/attributes/future.py

@@ -44,7 +44,7 @@ def add_next_avg_attributes(  # noqa: PLR0913
     # Extract hours from sensor key (e.g., "next_avg_3h" -> 3)
     try:
         hours = int(key.rsplit("_", maxsplit=1)[-1].replace("h", ""))
-    except (ValueError, AttributeError):
+    except ValueError, AttributeError:
         return
 
     # Use TimeService to get the N-hour window starting from next interval

custom_components/tibber_prices/sensor/attributes/timing.py

@@ -20,7 +20,7 @@ def _hours_to_minutes(state_value: Any) -> int | None:
 
     try:
         return round(float(state_value) * 60)
-    except (TypeError, ValueError):
+    except TypeError, ValueError:
         return None
 
 

custom_components/tibber_prices/sensor/calculators/timing.py

@@ -14,10 +14,13 @@ The calculator provides smart defaults:
     - No more periods → 0 for numeric values, None for timestamps
 """
 
-from datetime import datetime
+from typing import TYPE_CHECKING
 
 from .base import TibberPricesBaseCalculator  # Constants
 
+if TYPE_CHECKING:
+    from datetime import datetime
+
 PROGRESS_GRACE_PERIOD_SECONDS = 60  # Show 100% for 1 minute after period ends
 
 

custom_components/tibber_prices/sensor/calculators/trend.py

@@ -13,7 +13,6 @@ Caching strategy:
 - Current trend + next change: Cached centrally for 60s to avoid duplicate calculations
 """
 
-from datetime import datetime
 from typing import TYPE_CHECKING, Any, ClassVar
 
 from custom_components.tibber_prices.const import get_display_unit_factor
@@ -27,6 +26,8 @@ from custom_components.tibber_prices.utils.price import (
 from .base import TibberPricesBaseCalculator
 
 if TYPE_CHECKING:
+    from datetime import datetime
+
     from custom_components.tibber_prices.coordinator import (
         TibberPricesDataUpdateCoordinator,
     )

custom_components/tibber_prices/sensor/core.py

@@ -889,7 +889,7 @@ class TibberPricesSensor(TibberPricesEntity, RestoreSensor):
         if self.entity_description.entity_category == EntityCategory.DIAGNOSTIC:
             try:
                 value = self.native_value
-            except (KeyError, ValueError, TypeError):
+            except KeyError, ValueError, TypeError:
                 # If we can't get the value, hide the sensor
                 return False
             else:

custom_components/tibber_prices/services/get_apexcharts_yaml.py

@@ -211,7 +211,7 @@ def _check_custom_cards_installed(hass: Any) -> dict[str, bool]:
                         installed_cards["apexcharts-card"] = True
                     if "config-template-card" in url:
                         installed_cards["config-template-card"] = True
-        except (AttributeError, TypeError):
+        except AttributeError, TypeError:
             # Fallback: can't determine, assume not installed
             pass
 

hacs.json

@@ -1,5 +1,5 @@
 {
     "name": "Tibber Price Information & Ratings",
-    "homeassistant": "2025.10.0",
+    "homeassistant": "2026.4.0",
     "hacs": "2.0.5"
 }

pyproject.toml

@@ -39,6 +39,7 @@ ignore = [
     "D212",   # multi-line-summary-first-line (incompatible with formatter)
     "COM812", # incompatible with formatter
     "ISC001", # incompatible with formatter
+    "UP037", # quoted annotations; needed for TYPE_CHECKING forward references
 ]
 
 [tool.ruff.lint.per-file-ignores]