Fixes some Android devices treating an open reader page as closed after roughly five minutes of screen-off or background execution, clearing the session and showing a session-ended error.
Temporary Android pagehide, screen locking, backgrounding, restoration, and Port disconnections no longer stop speech, clear the timer display, or delete an active reader session. Actual reader-tab removal, Auto Close, and error cleanup still remove the complete session.
On browsers without browser.storage.session, an already-open reader re-registers its current session snapshot after a restarted background reconnects, restoring the article, tab association, timer, and Auto Close state without saving preferences, history, or other persistent data.
Fixes missing paragraph blank lines by targeting the actual #article-body container: body-block gaps are 2rem on desktop and 1.75rem on mobile.
Fixes device-dependent first-line indentation: every rendered body paragraph now shows two ideographic spaces before its first sentence. Headings remain unindented and spoken text is unchanged.
Keeps timer semantics unchanged: expiry pauses speech without Auto Close, and with Auto Close it still closes the source tab first and the reader tab second.
Keeps strict no-persistence behavior: article, settings, progress, timer, and tab association data are used only for the active reader session and are completely cleared after the reader is actually closed; no reading history or preferences are saved.
Improves Android screen-lock, background, and temporary Port-disconnect recovery: restoration and session claiming are serialized, with bounded retries for transient background unavailability, reducing false session-ended messages.
Improves timer-expiration delivery: a transient send failure keeps the active session in memory and retries after the reader reconnects instead of cleaning up the session prematurely.
Improves recovery from temporary Android speech-engine interruptions and post-restoration stalls with bounded in-memory restart attempts from the current sentence, preventing stale events from advancing playback incorrectly or causing unlimited restarts.
Continues the strict no-persistence privacy policy: recovery counters, Port state, session-claim retries, and pending timer delivery remain only in runtime memory;

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