Files
mantra-kmp/docs
Kgothatso Ngako 883bf1c84c refactor(ui): one extended FAB for every screen's primary action, with a gap in it
Twenty screens end their bottom bar in an `ExtendedFloatingActionButton` --
twenty-one buttons, one screen having two -- and eighteen of those were built
from the content-lambda overload with an `Icon` directly followed by a `Text`.
That overload puts nothing between the two, so the icon touched the label on
every one of them: visible in any render, and unnoticed because every FAB in
the app looked the same. Thirteen of the eighteen also carried the same
twenty-line block for looking disabled, because M3 gives a FAB no `enabled`.

**`ExtendedFab`, once, in widgets/buttons.** A label, an icon slot, `enabled`
and `onClick`. It draws `space150` between icon and label, which is the 12dp
M3 names `ExtendedFabEndIconPadding`; it borrows the disabled colours every
other button in the app uses, marks the node disabled so a screen reader does
not announce a button it is happy to press, and drops the press -- so the
thirteen call sites lose their `if (!canX) return@…` guards along with the
block and the `buttonColors` each of them declared. An icon slot rather than
an image, because two screens put a progress indicator where the icon was
while the action they started is out, and they still do.

**Not M3's `text`/`icon` overload, which would have spaced them for free.**
Its source wraps the label in `clearAndSetSemantics {}`: the label leaves the
merged semantics tree, a screen reader is told only what the icon says, and a
test cannot find the button by what it says -- five screen tests do. The
three FABs that were on that overload move to the widget too, and two of them,
Home's "New chat" and "Start the key ceremony", had a decorative icon beside
the cleared label and so no accessible name at all until now.
`ReadOnlyEntrancesJvmTest` had gone to the unmerged tree to find "New chat"
for this reason; the habit is harmless and stays. Every icon's description is
as it was, since several tests reach their FAB by it.

`ExtendedFabJvmTest` pins the decision: found by its label in the merged tree,
the icon before the label with a gap between, and disabled both announced and
refusing the press. The two docs that recorded the old state -- the
conformance account's "left alone" and the npub plan's unmerged-tree note --
each say what superseded them.

Verified with :composeApp:m3Audit (all budgets met, 0 dp literals in spacing
positions), :composeApp:compileDebugKotlinAndroid and :composeApp:jvmTest
(1088 tests, 3 new).

Replayed onto Mantra by docs/curated-to-mantra.md: AcceptCuratedSuggestionScreen.kt: deleted, as this commit deletes it upstream; AddGroupPostScreen.kt: deleted, as this commit deletes it upstream; EditGroupCuratedSchemaScreen.kt: deleted, as this commit deletes it upstream; EditGroupNostrProfileScreen.kt: deleted, as this commit deletes it upstream; EditGroupRelaysScreen.kt: deleted, as this commit deletes it upstream; GroupCuratedEntriesScreen.kt: deleted, as this commit deletes it upstream; ProposeGroupEventScreen.kt: deleted, as this commit deletes it upstream.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Pulled-From: curated/curated@ca6c16beb0
2026-09-13 16:35:32 +02:00
..

mantra docs

Notes on the parts of this app whose behaviour is not recoverable by reading the code alone — where the reasoning lives in a protocol, a failure mode that is silent, or a decision that looked arbitrary and was not.

document covers
shared-key-ceremony.md ChillDKG over NIP-17: the rounds, the approval gates, the chat transcript, participant ordering
shared-key-derivation.md deriving further keys from the group's threshold key with FROST tweaks — why not BIP32, why no chain code, and the one rule that must not be broken
subgroups.md a group making another group — the four ceremonies, what the parent's signature actually covers, and why the child's key is fresh rather than derived
frost-batch-signing.md signing several events in one ceremony — why one nonce can never cover two messages, and the phased schema, wire and UI work that follows from it
marmot-membership.md how members join an MLS group, and the epoch race that makes a missing member look like a successful invite
member-chronicle.md handing a member added after the work was done the group's signed record — why the events are not on the wire at all, and why the room's id is enough to verify them
marmot-direct-messages.md a one-to-one message inside a group as a stock NIP-59 gift wrap — what its MIP-03 carve-out costs, why the sender cannot read their own, and the one query that would broadcast it
mls-skipped-keys.md why a group event that arrives a moment late is dropped for good, which flows trigger it, the quartz fix, and the partial mitigation in this app
long-running-sync.md the chat subscriptions that stay open instead of pulling once per screen — why the request queue could not simply hold one, and how the group filter follows the room list
dead-code.md code in the sync and relay stack that nothing calls, why each piece is still there, and which of it is a bug rather than a leftover
nsec-sign-in.md signing in with an existing nostr key — why an nsec can never have a wallet behind it, the ten call sites that make it small, and the sign-in machine that was already built and unreachable
npub-sign-in.md signing in with only a public key — what a key that cannot sign can still see here, why that is a preview rather than a browser, and the four decisions the word settles
multiple-profiles.md several profiles on one device — why a profile is a credential and a seed is a wallet attached to one, why a switch is a restart rather than a swap, the two entrances the app lacks, and the inbox a switch would silently lose
jvm-target.md what desktop support cost, phased — why the native chain was already done, why an empty source set in our phoenix fork was the real blocker, and why DAO tests need none of it
npub-profile-preview.md showing the person before a direct message is started from a pasted npub — why the preview is a screen keyed by public key, what "found" means when a row can be a placeholder, and the phase that makes the button honest about a key package that never comes
material-design-conformance.md what the M3 foundations actually require, measured against all 43 screens — the colour pairing that renders the app's own proposals invisible, and eight phases that put the decisions back in the theme
curated-to-mantra.md pulling the Curated fork's thirty-nine commits back under Mantra's names — which lines of work to take, the three decisions, and a measured way to replay a twice-rebranded history without touching seven hundred files by hand
curated-to-mantra-profiles.md the second pull: the fork's several-profiles line, ten commits and its first schema migration — which of it is a fix Mantra has today, who allocates a schema version number when two trees share one history, and the one conflict, which was Mantra's own

Start with the ceremony if you are new to this area; the Marmot notes all assume it. Read the skipped-keys note before debugging any "the other device never got it" report — it is silent, and it looks like every other kind of delivery failure. The sync note stands alone, and the dead-code inventory reads as a follow-up to it. The batch-signing note is a phased plan that has been built: read it after the derivation note, whose one rule is the same one it is built around. The member chronicle note is a phased plan that has not been built, and reads as the membership note's unanswered half: what a member who joins late can be given, and the one thing they cannot. The jvm-target note is unrelated to all of them: it is a build and packaging story. The subgroups note is a phased plan that has been built; it assumes both shared-key notes and reads as the ceremony's second half — what a group does once it has a key, and what it can say about a group that does not yet. The Material Design note is a phased plan that has not been built, and is the only one about what the app looks like rather than what it does; read the jvm-target note first if you want to know why its adaptive-layout phase exists. The curated-to-mantra note is a phased plan that has been built, save for its last phase, which is a decision: it is about the repository rather than the app, and reads alone, except that its first decision leans on the derivation note's one rule. Two of the lines it pulled -- the group's nostr identity and the curated lists -- were taken out again the same day, and its record says what went and what stayed. The nsec and npub sign-in notes arrived with it and record what they built. The profiles pull note is the same exercise a second time, planned with its dry run already done and built the same day; read it after the first, because it assumes the method and the three decisions and only says what changed — chiefly that the tree is no longer a superset, and what the check for an exact pull becomes when it is not. The nsec sign-in note is a phased plan that has been built; it inherits the key-storage decision from the jvm-target note and drives the navigation state machine NavigationViewModel.processLocalAccount implements, so read it with the code open, and read its table of where the build chose differently first. The npub sign-in note is a phased plan that has been built, and reads as that plan's out-of-scope note answered: it takes the Identity type and the sign-in machine as given and asks what an identity with no secret is for, before it asks how to build one; read its table of where the build chose differently first. The multiple-profiles note is a phased plan that has been built, and reads as the third of the sign-in notes: it asks what happens when the device holds two identities, and its first phase changes one rule the other two share — a seed's key becomes a credential like any other — so read it with StoredIdentity.merge, SovereignWalletViewModel.switchToIdentity and the startup screen open, and read its table of where the build chose differently first. The npub profile preview note is a phased plan that has been built, and is the smallest of the plans: it changes the entrance to the direct-message flow and nothing past it, so read it with StartDirectMessageToNpubOrNip05Dialog and ChatRoomMessagingViewModel.initiateNewChat open, its four decisions before its four phases, and its table of where the build chose differently first.