TX strip: make the CQ options sheet discoverable

[patrickrb]

Problem

Holding the CQ button opens an options sheet (CQ modifier, free text, Field Day), but the only hint it existed was a 10dp, 50%-alpha chevron tucked after the label plus the whole-button long-press gesture. A tester reported: "it's too hard to understand that holding CQ button shown popup. I wouldn't know if I dont report this issue."

Change

• Replace the faint glyph with a visible, separately-tappable chevron button at the trailing edge of the CQ button. A plain tap opens the options sheet — no need to discover the long-press.
• Add a tx_cq_options content description ("CQ message options …") for accessibility / TalkBack.
• Whole-button long-press still opens the same sheet (shortcut kept); short-tap still calls CQ.
• Extract the subtitle precedence (free text > Field Day > modifier > none) into a testable cqStripSubtitle() helper.

Tests

• New CqStripSubtitleTest covering the precedence + STOP-state cases.
• testDebugUnitTest green; built and installed on the Pixel 8, launches cleanly.

Part of a series addressing tester feedback on the Android UI (item 1 of 4).

[codecov]

Codecov Report

❌ Patch coverage is 28.57143% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 11.50%. Comparing base (6bc083c) to head (4dc3ef3).
⚠️ Report is 29 commits behind head on dev.

Files with missing lines	Patch %	Lines
...kotlin/radio/ks3ckc/ft8af/ui/components/TxStrip.kt	28.57%	15 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                dev     #349      +/-   ##
============================================
- Coverage     11.70%   11.50%   -0.21%     
- Complexity      113      120       +7     
============================================
  Files            85       89       +4     
  Lines         11691    12578     +887     
  Branches       2110     2249     +139     
============================================
+ Hits           1369     1447      +78     
- Misses        10191    11000     +809     
  Partials        131      131              

Files with missing lines	Coverage Δ
...kotlin/radio/ks3ckc/ft8af/ui/components/TxStrip.kt	4.84% <28.57%> (+1.13%)	⬆️

... and 3 files with indirect coverage changes

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[Copilot]

Pull request overview

Improves the discoverability and accessibility of the CQ options sheet in the TX strip by adding a dedicated chevron affordance and extracting subtitle precedence logic into a unit-testable helper.

Changes:

• Adds a separately tappable chevron button on the CQ action to open the CQ options sheet (while preserving whole-button long-press).
• Introduces cqStripSubtitle() helper and adds unit tests to validate subtitle precedence and STOP behavior.
• Adds an accessibility content description string for the CQ options affordance.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
ft8af/app/src/main/kotlin/radio/ks3ckc/ft8af/ui/components/TxStrip.kt	Adds cqStripSubtitle() helper and replaces the faint chevron with a dedicated tappable chevron affordance plus accessibility semantics.
ft8af/app/src/main/res/values/strings_compose.xml	Adds tx_cq_options string for TalkBack/content description on the new chevron button.
ft8af/app/src/test/kotlin/radio/ks3ckc/ft8af/ui/components/CqStripSubtitleTest.kt	Adds unit tests covering subtitle precedence and STOP-state behavior.

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