bug: Android share capture inserts extra/unwanted whitespace

[tstapler]

Problem

Capturing content via the Android share sheet (CaptureActivity) sometimes lands in the journal block with extra spaces the user didn't intend.

Root cause hypothesis

CaptureActivity.buildShareText() (androidApp/src/main/kotlin/dev/stapler/stelekit/CaptureActivity.kt:186-201) only handles which source (clipData vs EXTRA_TEXT vs EXTRA_SUBJECT) wins and blank-source fallback — it does no whitespace normalization on the winning string itself. CaptureViewModel.save() only calls .trim() on the whole string (outer whitespace only; CaptureViewModel.kt:54).

Many share sources (browsers sharing a text selection, apps that share HTML-derived text via EXTRA_TEXT) commonly include runs of internal whitespace, non-breaking spaces ( ), or repeated blank lines carried over from the source DOM/layout — none of which get collapsed before the block is saved.

androidApp/src/test/kotlin/dev/stapler/stelekit/CaptureShareTextTest.kt covers source-priority and blank-fallback behavior but has no test case for a string containing internal whitespace runs, confirming this path is untested/unhandled today.

Why this matters

• Silent formatting corruption on every capture from apps whose share payload isn't already clean plain text — the exact failure mode of the highest-frequency, lowest-friction entry point (see companion issue: auto-link + tag-suggest on capture).

Suggested scope

• Normalize whitespace in buildShareText() (or a follow-up step in CaptureViewModel) before it reaches the block: collapse runs of spaces/tabs, normalize non-breaking spaces to regular spaces, collapse 3+ consecutive newlines to at most 2 — while preserving intentional single line breaks.
• Add test cases to CaptureShareTextTest covering non-breaking spaces, repeated internal spaces, and excessive blank lines, mirroring a real Chrome/browser share payload.

References

• androidApp/src/main/kotlin/dev/stapler/stelekit/CaptureActivity.kt
• androidApp/src/test/kotlin/dev/stapler/stelekit/CaptureShareTextTest.kt

[tstapler]

Related: #264 (auto-link + tag-suggest on the same capture path)

[tstapler]

Fixed — CaptureActivity.buildShareText() now normalizes whitespace artifacts (collapses runs of spaces/tabs and blank-line runs, trims/dedups the title) via #269, with review follow-ups closed out in #281. See the documented scope decision/known limitation in CaptureActivity.kt's companion object and project_plans/android-share-capture-whitespace/implementation/plan.md.