Promote dev → staging (CAT chip false red, Share logs in About, USB port picker)

[patrickrb]

Promotes #818, #819 and #820 to staging.

What's in this promotion

#818: CAT chip no longer turns red while CAT works (#781).

• Root cause 1, the watchdog armed itself on the app's own frequency push. A rig that takes commands but never answers a frequency read was declared dead about 8 s after connect. setOperationBand now uses BaseRig.setCommandedFreq(), which is not a liveness signal. Only real rig replies arm the watchdog, and USB Diagnostics no longer shows "CAT Response: pass" for a rig that never replied.
• Root cause 2, a trip was permanent. One missed window (an ATU tune, a menu, a Bluetooth hiccup) left the chip red until the operator tapped it. The new CatLivenessTracker keeps probing after a trip, and the next reply turns the chip back to CONNECTED.
• Copilot review fix: chip-state writes now happen under the tracker's lock, atomically with the transition that caused them. A reply can no longer heal the chip just before the trip's ERROR is written, which left it red and unrecoverable. A recovery can no longer overwrite a connector error either.
• Trip and recovery are now logged to debug.log (CAT liveness: …).

#819: Share logs / View logs in Settings → About.

• The 7-taps-on-version unlock is gone. About now always shows Share logs, which opens the share sheet with debug.log in one tap (or shows a toast when there's no log yet), and View logs, the existing viewer.
• The saved debug-mode flag and its config hydration are removed; an old debugModeEnabled config row is ignored.
• The GitHub bug-report body now points to About → Share logs.
• The new strings are translated in all 17 locales.

#820: Readable USB serial port picker, VID+PID device match, diagnostics hints (#817, partial).

• Picker rows: they now read Silicon Labs CP2105 · Port 1 of 2 · Enhanced instead of raw hex. When a CP2105 is attached, a hint explains that Yaesu rigs use the Enhanced port for CAT and Kenwood TS-890S/TS-990S use Standard.
• Device match: the picked device is now matched by VID+PID (then deviceId), not by vendor alone. This fixes an FT-891 (CP2105) plus a Digirig (CP2102) opening the wrong chip.
• CDC-class rigs now appear in the picker when they have a Communications interface.
• USB Diagnostics:
  • New "CAT Port" row, e.g. Port 2 of 2 · Standard · 4800 bd.
  • A hint appears when the port is open but CAT is silent.
  • In FT-710 cable mode, CAT Response is an informational row instead of a permanent red.
• Copilot review fixes:
  • Chip names map driver class literals, so they survive R8 renaming in release builds.
  • Diagnostics counts CDC fallback devices as serial devices.
  • The VID/PID and permission rows describe the connected port's device.
  • Hints are suppressed for Bluetooth/network links and once CAT has answered.
• Auto-selecting the CAT port and auto-probing baud rates were declined on purpose; the reasoning is in USB CAT: readable serial port picker, VID+PID device match, diagnostics hint (#817) #820.

Testing

• Each PR's unit tests pass: tracker races, share intent, diagnostics and picker labels.
• Not verified on hardware. Worth checking on staging:
  • a TX-500 over Bluetooth, or any rig that doesn't echo frequency reads (Fix CAT chip turning red while CAT still works (#781) #818);
  • a real CP2105 rig such as an FT-891 or FT-991A (USB CAT: readable serial port picker, VID+PID device match, diagnostics hint (#817) #820);
  • one tap on About → Share logs (Put Share logs / View logs in Settings > About (no 7-tap unlock) #819).

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 49.19355% with 63 lines in your changes missing coverage. Please review.
✅ Project coverage is 42.04%. Comparing base (1df9f08) to head (886a50e).
⚠️ Report is 19 commits behind head on staging.

Files with missing lines	Patch %	Lines
...o/ks3ckc/ft8af/ui/settings/UsbDiagnosticsScreen.kt	62.33%	28 Missing and 1 partial ⚠️
...in/radio/ks3ckc/ft8af/ui/settings/AboutSettings.kt	0.00%	21 Missing ⚠️
...dio/ks3ckc/ft8af/ui/settings/RadioAudioSettings.kt	11.11%	8 Missing ⚠️
...n/radio/ks3ckc/ft8af/ui/settings/DebugLogScreen.kt	70.58%	4 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             staging     #822      +/-   ##
=============================================
+ Coverage      41.94%   42.04%   +0.09%     
  Complexity       239      239              
=============================================
  Files            276      276              
  Lines          33103    33177      +74     
  Branches        3855     3871      +16     
=============================================
+ Hits           13886    13949      +63     
- Misses         18936    18945       +9     
- Partials         281      283       +2     

Flag	Coverage Δ
android	17.53% <49.19%> (+0.26%)	⬆️
desktop	63.95% <ø> (ø)
ios	97.71% <ø> (ø)
native	9.93% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
.../radio/ks3ckc/ft8af/ui/settings/BugReportDialog.kt	18.88% <ø> (ø)
...n/radio/ks3ckc/ft8af/ui/settings/BugReportLogic.kt	100.00% <ø> (ø)
...n/radio/ks3ckc/ft8af/ui/settings/DebugLogScreen.kt	13.33% <70.58%> (+13.33%)	⬆️
...dio/ks3ckc/ft8af/ui/settings/RadioAudioSettings.kt	0.26% <11.11%> (+0.13%)	⬆️
...in/radio/ks3ckc/ft8af/ui/settings/AboutSettings.kt	0.00% <0.00%> (ø)
...o/ks3ckc/ft8af/ui/settings/UsbDiagnosticsScreen.kt	55.75% <62.33%> (+4.13%)	⬆️

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