fix: Clear the initialized condition state when the card is not usable (#2646)
The `initialized` state (used in conditions/triggers) was written once and never cleared, so it meant "has this card ever been initialized" while everything reading it took it as "is this card usable now". Home Assistant takes a card off the page and puts it back whenever its dashboard tab is left and returned to, so the card initialized again while the state claimed it was initialized throughout: `trigger: initialized` fired once per card rather than once per startup, and automations were dropped in between. The card lifecycle is now an explicit state machine (`SessionManager`), the only writer of `initialized`, which separates a card that is starting up from one initializing part of itself again while it runs. A new `ever` parameter (conditions/triggers) selects the old latched behaviour. `remote_control` uses that parameter to keep its two camera priorities correct under repeated starts. With `camera_priority: entity` the card now re-reads the entity every time it starts, so a camera selected while the card was away is picked up on return. With `camera_priority: card` the card writes the entity on its first start only, unchanged, since repeating that write would overwrite a camera the user had selected. Closes: #2642 BREAKING CHANGE: `condition: initialized` is now `false` whenever the card is not usable, and `trigger: initialized` fires each time the card starts up rather than only the first time. Set `ever: true` on either to keep the previous behaviour.
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@@ -13,6 +13,14 @@ overrides:
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> [!WARNING]
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> Whilst all configuration parameters are theoretically overridable, in some instances a configuration variable may only be consulted on startup or changing its value may negatively impact behavior -- override results may vary!
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> [!WARNING]
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> Avoid an override whose `conditions` depend on a value that the override itself
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> changes. Applying it changes what its own conditions were matching, so it may
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> turn itself on and off repeatedly, or undo the very change that applied it. Examples: a [`camera`](conditions-triggers.md?id=camera) condition that sets
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> `cameras`, an
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> [`initialized`](conditions-triggers.md?id=initialized) condition that sets
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> anything the card must start up again to use.
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The top-level `overrides` configuration block expects a list, with each list
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item containing `conditions` and at least one of `merge`, `delete` or `set` specified.
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