M0: compilable skeleton — Kigi 0.1.0 fork surgery

Hard fork of xai-org/grok-build (Apache-2.0) re-targeted as Kigi, an
unofficial Kimi Code CLI community build.

Rename & identity
- 72 xai-*/xai-grok-* crates -> kigi-* (explicit: xai-grok-pager-bin ->
  kigi-bin [binary `kigi`], xai-grok-pager -> kigi-tui; rest mechanical);
  ptyctl, ptyctl-cli, third_party/ unchanged; proto package
  xai.grok.tools.v1 -> kigi.tools.v1
- Config home ~/.kigi (KIGI_SHARE_DIR override), env prefix GROK_* ->
  KIGI_*, `kigi --version` carries the unofficial-community-build notice
- clap identity, help text, startup banner, prompt templates rebranded
  (templates re-encrypted)

Deletions (PRD removal list #5/#6/#7/#9/#10)
- voice input (xai-grok-voice) and all TUI wiring
- telemetry: Mixpanel client, external OTel stream, Sentry, OTLP layers,
  trace/GCS/S3 upload queues (kigi-file-utils halved), workspace upload
  module & dc_log, heap-profile uploader, auth-diagnostics uploader,
  session-analytics halves of feedback; local zero-egress observability
  preserved in new kigi-log crate (unified log, --debug firehose,
  subsystem file logs, opt-in instrumentation)
- announcements (crate, remote-settings fields, TUI surfaces)
- plugin marketplace (crate, sources/browse/CTA/extensions-modal tab);
  direct plugin install/uninstall/update via kigi-agent git_install kept
- relay/gateway/assets endpoints and features (agent relay, headless
  relay transport, gateway bridge, LeaderEnvUrls); leader IPC socket now
  ~/.kigi/leader.sock + KIGI_LEADER_SOCKET, no ws-url derivation
- functional types rehomed instead of deleted: PermissionMode ->
  kigi-config-types, McpInitStrategy -> kigi-mcp, PrCreationSource ->
  session signals, TerminalDiagnostics -> kigi-pager-render, agent_id ->
  shell util

Endpoints
- kigi-env rewritten: single production KigiEndpoints {coding_api_base_url
  https://api.kimi.com/coding/v1 (KIGI_CODE_BASE_URL), oauth_host
  https://auth.kimi.com (KIGI_OAUTH_HOST), update_base_url (GitHub
  Releases API), upgrade_page_url}; GrokBuildEnvironment enum deleted

Toolchain & workspace hygiene
- Rust 1.97.0 pinned; edition 2024; full cargo update; git2 hoisted to
  workspace at 0.21 (Option->Result API migration), quick-xml 0.41
- Root Cargo.toml hand-maintained (PRD §8.1): version 0.1.0 inherited by
  all members, members sorted, unused deps pruned
- cargo-deny advisories gate (deny.toml with documented transitive
  exceptions); CI workflow (check/clippy/fmt/deny/test, macOS+Linux)
- cross-crate test seams re-gated behind `test-support` cargo feature;
  insta snapshot baselines renamed to the kigi_tui prefix
- clippy --workspace --all-targets: zero warnings; fmt clean

Fixes surfaced by the port
- updater probe/installer divergence (bin/kigi vs bin/grok symlink set)
- idle model-metadata refresh dead under KIGI_CODE_BASE_URL override
  (new is_effective_coding_endpoint_url, loopback+override aware)
- macOS symlinked-TMPDIR fixture canonicalization (foreign_sessions,
  fast-worktree); RSS measurement tests serialized via serial_test

Docs & legal (Apache §4)
- NOTICE added (upstream attribution + change statement); THIRD-PARTY
  notices sustained; kigi-tools ported-code notices extended; README,
  CONTRIBUTING, SECURITY, AGENTS.md rewritten

Out of scope for M0 (tracked): Kimi auth/inference (M1), search/fetch,
command parity, config import (M2), Computer Hub excision & final
brand-token sweep (M2), distribution & self-update rewrite (M3).

crates/codegen/kigi-tui/src/tips/send_now.rs

@@ -0,0 +1,66 @@
+//! Tip after queuing a follow-up while a turn is running: advertise that
+//! bare Enter on an empty prompt force-sends the top queued item ("send now").
+
+use ratatui::style::{Modifier, Style};
+use ratatui::text::{Line, Span};
+
+use super::EphemeralTip;
+use crate::theme::Theme;
+
+/// Ephemeral-tip dedup key for the queued-follow-up send-now hint.
+pub(crate) const SEND_NOW_TIP_KEY: &str = "send_now_tip";
+
+/// Key into the per-session in-memory seen-count map for this tip.
+pub(crate) const SEND_NOW_TIP_SEEN_KEY: &str = "send_now_tip_shown_count";
+
+/// Stop showing after this many shows within a single session.
+const SEND_NOW_TIP_SEEN_CAP: u32 = 3;
+
+/// Build "Queued · Enter to send now", seen-gated to
+/// [`SEND_NOW_TIP_SEEN_CAP`] shows per session (in-memory).
+///
+/// After a mid-turn queue the composer is empty, so a second Enter force-sends
+/// the top queued follow-up without learning a special chord.
+pub fn send_now_tip() -> EphemeralTip {
+    let theme = Theme::current();
+    let dim = Style::default().fg(theme.gray);
+    let key_style = Style::default()
+        .fg(theme.text_secondary)
+        .add_modifier(Modifier::BOLD);
+    EphemeralTip::new(
+        SEND_NOW_TIP_KEY,
+        Line::from(vec![
+            Span::styled("Queued · ", dim),
+            Span::styled("Enter", key_style),
+            Span::styled(" to send now", dim),
+        ]),
+    )
+    .with_session_seen_cap(SEND_NOW_TIP_SEEN_KEY, SEND_NOW_TIP_SEEN_CAP)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn send_now_tip_builder_applies_seen_gating() {
+        assert_eq!(
+            send_now_tip().session_seen.map(|(key, _cap)| key),
+            Some(SEND_NOW_TIP_SEEN_KEY)
+        );
+        assert_eq!(
+            send_now_tip().session_seen.map(|(_, cap)| cap),
+            Some(SEND_NOW_TIP_SEEN_CAP)
+        );
+    }
+
+    #[test]
+    fn send_now_tip_advertises_enter() {
+        let tip = send_now_tip();
+        let text: String = tip.line.spans.iter().map(|s| s.content.as_ref()).collect();
+        assert!(
+            text.contains("Enter") && text.contains("send now") && text.contains("Queued"),
+            "expected queued/send-now copy with Enter, got {text:?}"
+        );
+    }
+}