Wi-Fi over ADB: pairing, auto-connect, catch-up and reconnect

[Qwinty]

Adds Wi-Fi over ADB. The phone no longer needs a cable after the first setup.

What's in it

• "Phones and Wi-Fi" panel: pairing by QR code or six-digit code (Android 11+), "From cable" (adb tcpip 5555, with a warning that the link isn't encrypted), connecting by address, and picking or forgetting a phone.
• Discovery and auto-connect: phones are found over mDNS, and remembered phones connect by themselves when they show up on the network. The chosen phone is stored by its Wi-Fi id, so a new address after a reconnect doesn't lose the choice. adb's " (2)" suffix is ignored.
• Stream over Wi-Fi:
  • a key frame every second;
  • 6 Mbit/s at start, lowered on congestion and raised again after clean minutes;
  • when the picture falls more than 500 ms behind, frames are skipped to the next key frame, so delay doesn't pile up.
• Reconnect: up to 5 attempts while apps keep the last frame. Sessions that keep failing back off, and the reconnect path has stop checks and short timeouts.
• VPN on the phone: the phone doesn't announce itself over mDNS and shows the VPN address. After pairing, the app pre-fills the phone's Wi-Fi IP for "Connect by address". If a typed address fails, the app retries the same port on the phone's known Wi-Fi IPs and drops the offline connection left behind.
• Forget: the phone is disconnected and not picked again, including after an app restart. The UI explains that unpairing is done on the phone.
• New strings in all 13 languages, docs/SPEC.md §2.4, and draft notes in docs/releases/v0.2.0.md. The version is not bumped.

Checks

• cargo test --lib: 84 passed (after merging main), pnpm check: 0 errors. clippy shows no new warnings.
• Two rounds of independent review; everything flagged is fixed, except two minor edge cases below.
• On a OnePlus 11R (Android 15), with a VPN on the phone:
  • pairing by code: the phone was found over mDNS and paired;
  • after pairing, the Wi-Fi IP was pre-filled and connecting by port worked;
  • connecting by the VPN address 26.26.26.1:port fell back to 192.168.3.237:port;
  • reconnect: the "Reconnecting (N of 5)" status showed, then it went back to the cable;
  • 5 minutes of streaming over Wi-Fi: 30 fps, one catch-up from 515 ms back to 20 ms.
• Pairing by QR was not tested on the phone: only the phone's camera can scan the code. It uses the same adb pair/connect.

Known limitations

• The address of a phone switched over "From cable" can go to another device after the router reassigns it; nothing checks it is the same phone.
• When the app switches to another phone, the lens and size can carry over from the previous one.