web/src/lib/slashExec.ts and web/src/components/SlashPopover.tsx had zero
importers since the React composer was replaced by the PTY-embedded TUI
(f49afd3122) — exactly what web/AGENTS.md forbids, now orphaned. Their
parseSlash still carried the `(.*)` newline bug and lacked the `prefill`
variant. Desktop and the TUI each hand-rolled the same slash split and the
same command.dispatch narrowing; the multi-line fix (#41323, #55510) had to
be applied to each copy separately.
Sites:
web/src/lib/slashExec.ts::executeSlash/parseSlash/parseCommandDispatch -> deleted
web/src/components/SlashPopover.tsx::SlashPopover -> deleted
apps/desktop/src/lib/chat-runtime.ts::parseSlashCommand -> apps/shared/src/slash.ts::parseSlashCommand
apps/desktop/src/lib/chat-runtime.ts::parseCommandDispatch -> apps/shared/src/slash.ts::parseCommandDispatch
apps/desktop/src/lib/chat-runtime.ts::SLASH_COMMAND_RE -> apps/shared/src/slash.ts::SLASH_COMMAND_RE
apps/desktop/src/app/types.ts::*CommandDispatchResponse (5 interfaces) -> apps/shared/src/slash.ts
ui-tui/src/domain/slash.ts::parseSlashCommand/looksLikeSlashCommand -> apps/shared/src/slash.ts
ui-tui/src/lib/rpc.ts::asCommandDispatch -> apps/shared/src/slash.ts::parseCommandDispatch
ui-tui/src/gatewayTypes.ts::CommandDispatchResponse -> apps/shared/src/slash.ts
9 desktop importers + 3 TUI importers repointed.
Behavior change: desktop `parseSlashCommand` now lower-cases the command
name like the TUI, backend `resolve_command` and `slash.exec` already do
(`/Help` resolved before via the case-insensitive backend; local desktop
action lookups were case-sensitive). TUI's parsed result no longer carries
the redundant `cmd` echo (no consumer read it).
Tests: apps/shared/src/slash.test.ts (parseSlashCommand multi-line /
newline-boundary / degenerate cases; parseCommandDispatch every variant +
malformed rejection). Sabotage: restoring `(.*)` in SLASH_PARTS_RE fails
2 tests; restored -> 7 pass. Desktop chat-runtime.test.ts and TUI
asCommandDispatch.test.ts cases moved here; slashParity.test.ts repointed.
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