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/app/dispatch/mod.rs

@@ -0,0 +1,64 @@
+//! Synchronous state dispatch: [`Action`](crate::app::actions::Action) → state mutations + [`Effect`](crate::app::actions::Effect)s.
+//!
+//! This is the core business logic of the application.  It takes an action,
+//! mutates application state, and returns a list of async effects to execute.
+//!
+//! **Invariants:**
+//! - This module never touches the terminal, network, or filesystem.
+//! - All mutations are synchronous and deterministic.
+//! - Async work is described as [`Effect`](crate::app::actions::Effect) values, not executed.
+//! - This makes dispatch fully testable without tokio or a terminal.
+//!
+//! Imports in this tree use at most one `super::` hop (absolute `crate::` paths
+//! otherwise); tests/ shares a fixture prelude via `use super::*;`.
+
+mod auth;
+mod billing;
+mod ctx;
+mod dashboard;
+mod import_claude;
+mod interject;
+mod jump;
+mod modes;
+mod notes;
+mod permissions;
+mod prompt;
+mod queue;
+mod rewind;
+mod router;
+mod session;
+mod settings;
+mod status;
+mod task_result;
+mod transcript;
+mod turn;
+
+pub(crate) use billing::{
+    FREE_USAGE_USER_MESSAGE, UPSELL_URL_PAYG, UPSELL_URL_UPGRADE,
+    acp_error_is_free_usage_exhausted, is_credit_limit_error, is_free_usage_exhausted_error,
+};
+pub(crate) use modes::{downgrade_displayed_auto_if_gated, effective_auto};
+pub(crate) use notes::{recap_unavailable_toast, scrollback_has_user_messages};
+pub(crate) use permissions::resolve_permission_queue_transition;
+pub(crate) use prompt::dispatch_initial_prompt;
+pub(in crate::app) use prompt::show_small_screen_tip;
+pub(super) use queue::{
+    apply_turn_start_shim, arm_send_now_and_paint, maybe_drain_queue, shim_renders_own_user_block,
+};
+pub(in crate::app) use rewind::{find_user_prompt_entry_for_shell_index, shell_prompt_index_at};
+pub(crate) use router::dispatch;
+pub(crate) use settings::ui::refresh_open_settings_modals;
+pub(crate) use status::commit_minimal_update_notice;
+pub(crate) use turn::reconcile_overdue_turn_ends;
+
+// Test-only consumers (cfg(test) mods elsewhere in the crate); a plain
+// re-export trips -D unused-imports in the lib build.
+#[cfg(test)]
+pub(crate) use ctx::{SwitchCause, switch_to_agent};
+#[cfg(test)]
+pub(crate) use settings::ui::{ROLLBACK_NO_ARM_TOAST, build_pager_snapshot};
+#[cfg(test)]
+pub(crate) use turn::TURN_END_RECONCILE_GRACE;
+
+#[cfg(test)]
+mod tests;