fix(keysign): open Fast Sign on the keysign animation, not the QR

[aminsato]

Closes #5965

Summary

• No QR flash. KeysignFlowViewModel starts with an empty placeholder vault, so getThreshold(0) was 0 on the first frames and KeysignPeerDiscovery drew PeerDiscoveryScreen and its QR before setData loaded the real vault. A Fast Sign route (password set) now counts "vault not loaded yet" as waiting for the server.
• No old connecting layout. That wait now shows KeysignLoadingScreen: the full-screen riv_keysign in its "Connecting" state, the same screen keysign joiners already use. ConnectingToServer (the 24dp animation with "This should only take a second") is no longer used by keysign. Keygen still uses it.
• No "Preparing vault…" on the hand-off. KeysignRiveProgress showed that text while riv_keysign inflated asynchronously, which flashed between the connecting animation and the signing animation. It now shows the plain background while the file loads. The text fallback stays for builds where Rive never initialised.

The threshold == 2 check stays once the vault has loaded: a fast vault with 4+ signers still needs another device, so it still gets the QR. The secure-vault discovery screen and how the server session starts are unchanged.

Test plan

• ./gradlew assembleDebug
• Fast vault → Send → Fast Sign: straight to the full-screen keysign animation ("Connecting"), no QR, no old connecting screen, then signing with no "Preparing vault…"
• Same with a slow server: the animation holds until the server joins
• Secure vault → Send: the QR and device list still show

Summary by CodeRabbit

• Bug Fixes
  • Fast Sign now displays its loading screen while vault information is unavailable or while the signer threshold is being reached.
  • The key-signing progress screen shows a primary-background screen while its animation loads, and displays a “Preparing vault” indicator if the animation is unavailable.

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📒 Files selected for processing (2)

• app/src/main/java/com/vultisig/wallet/ui/screens/keysign/KeysignPeerDiscovery.kt
• commondata

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📝 Walkthrough

Walkthrough

The keysign flow now represents an unavailable vault as null. Peer discovery handles that state before rendering vault-dependent content. Rive loading distinguishes loading, ready, and unavailable states, with corresponding keysign progress displays.

Changes

Keysign loading and discovery

Layer / File(s)	Summary
Vault state and peer discovery app/src/main/java/com/vultisig/wallet/ui/models/keysign/KeysignFlowViewModel.kt, app/src/main/java/com/vultisig/wallet/ui/screens/keysign/KeysignPeerDiscovery.kt, commondata	The flow state defaults to a null vault. Peer discovery effects run before the vault check. A null vault displays the Fast Sign loading screen or a themed background; with a vault, Fast Sign displays the loading screen at threshold 2, and other cases render peer discovery.
Rive resource loading states app/src/main/java/com/vultisig/wallet/ui/components/rive/RiveAnimation.kt, app/src/main/java/com/vultisig/wallet/ui/screens/keysign/Keysign.kt	Rive resource loading exposes Loading, Ready, and Unavailable states. The progress UI displays a background while loading, “Preparing vault” when unavailable, and the loaded file when ready.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~15 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to c7221

The Fast Sign waiting-screen change has no identified merge-blocking issue. It is ready for normal checks.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Out of Scope Changes check	⚠️ Warning	The whole-PR changes include an unrelated commondata subproject reference update from ef5b9f0fa1c480666f651efbbf71298a922d3a9b to 4064d4738bb2c5060098541cf61ad743e506cf11. The linked issue cover…	Revert the commondata subproject reference change, or provide and implement a direct [#5965] requirement that needs this exact update.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 4 files. (1 skipped: 1 …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: Fast Sign now opens on the keysign animation instead of the QR screen.
Linked Issues check	✅ Passed	The implementation meets the coding requirements in [#5965]. KeysignPeerDiscovery routes Fast Sign to KeysignLoadingScreen when the vault is null and while a 2-of-2 Fast Sign session waits. This b…

Full details: Out of Scope Changes check

Explanation

The whole-PR changes include an unrelated commondata subproject reference update from ef5b9f0fa1c480666f651efbbf71298a922d3a9b to 4064d4738bb2c5060098541cf61ad743e506cf11. The linked issue covers Fast Sign wait-screen behavior and does not connect this dependency update to that objective.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 4 files. (1 skipped: 1 unsupported.)

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In `@app/src/main/java/com/vultisig/wallet/ui/screens/keysign/Keysign.kt`:
- Line 240: Update rememberRiveResourceFile and KeysignRiveProgress to preserve
the Rive resource load state instead of mapping both Loading and Error to null;
render a visible progress or error fallback when riv_keysign.riv fails to load,
rather than showing only the background.

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Reviewing files that changed from the base of the PR and between 9d841eb and 7a68781.

📒 Files selected for processing (2)

• app/src/main/java/com/vultisig/wallet/ui/screens/keysign/Keysign.kt
• app/src/main/java/com/vultisig/wallet/ui/screens/keysign/KeysignPeerDiscovery.kt

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[aminsato]

@Vaulty-bot pick-up and resolve the conflicts

[Vaulty-bot]

Picked up. Reading feedback and working on it.

[Vaulty-bot]

Resolved the merge conflicts with main in d6f0b88.

• Conflict: there was one, in KeysignPeerDiscovery.kt. It was imports only: this branch added androidx.compose.ui.Modifier for the Fast Sign vault-load placeholder, and feat(keysign): Share QR sheet with Copy Link on secure signing #5974 added androidx.compose.runtime.setValue for the Share QR sheet. I kept both. No logic changed, and the null-vault early return and the auto-start guard from 87e090c are unchanged.
• Comments fixed: none were outstanding. johnnyluo's question about when the vault is loaded was already addressed in 87e090c, and I replied in each thread to say the merge keeps that fix.
• Comments declined: none.
• Verification: ktfmtCheck passes. I couldn't run a local Kotlin compile because the build host's Android SDK directory is read-only, so CI will be the first compile check. GitHub now reports the PR as mergeable.

[johnnyluo]

LGTM