SubMiner/backlog/tasks/task-239.4 - Add-sentence-clipping-from-arbitrary-subtitle-ranges.md

id, title, status, assignee, created_date, labels, milestone, dependencies, references, parent_task_id, priority

id	title	status	assignee	created_date	labels	milestone	dependencies	references	parent_task_id	priority
TASK-239.4	Add sentence clipping from arbitrary subtitle ranges	To Do		2026-03-26 20:49	feature subtitle anki ux	m-2		src/renderer/modals/subtitle-sidebar.ts src/main/runtime/subtitle-position.ts src/anki-integration/card-creation.ts src/main/runtime/mpv-main-event-actions.ts	TASK-239	medium

Description

Current mining flows are optimized around the active subtitle line. Add a sentence-clipping workflow that lets users select an arbitrary contiguous subtitle range, preview the combined text/timing, and mine from that selection. This should improve multi-line dialogue capture without forcing manual copy/paste or separate post-processing.

Acceptance Criteria

• #1 Users can select a contiguous subtitle range from the existing subtitle UI instead of being limited to the active cue.
• #2 The workflow previews the combined text and resulting timing range before mining.
• #3 Mining from a clipped range uses the combined subtitle payload in card generation while preserving existing single-line behavior.
• #4 The feature handles overlapping/edge timing cases predictably and does not corrupt the normal active-cue flow.
• #5 Tests cover range selection, combined payload generation, and at least one card-creation path using a clipped selection.

Implementation Plan

1. Define a selection model that fits the existing subtitle sidebar/runtime data flow.
2. Add preview + confirmation UI before routing the clipped payload into mining.
3. Keep the existing single-line path intact and treat clipping as an additive workflow.
4. Verify with subtitle-sidebar, runtime, and Anki/card-creation tests.