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-system-power/src/windows.rs

@@ -0,0 +1,103 @@
+//! Windows system sleep/wake via `PowerRegisterSuspendResumeNotification`
+//! with a `DEVICE_NOTIFY_CALLBACK` recipient — no hidden window or message
+//! loop required (Windows 8+).
+//!
+//! NOTE: this module only compiles when targeting Windows.
+
+use std::os::raw::c_void;
+
+use windows_sys::Win32::Foundation::HANDLE;
+use windows_sys::Win32::System::Power::{
+    DEVICE_NOTIFY_SUBSCRIBE_PARAMETERS, HPOWERNOTIFY, PowerRegisterSuspendResumeNotification,
+    PowerUnregisterSuspendResumeNotification,
+};
+use windows_sys::Win32::UI::WindowsAndMessaging::DEVICE_NOTIFY_CALLBACK;
+
+use super::{PowerCallback, PowerEvent};
+
+// Power-broadcast event types (WM_POWERBROADCAST `wParam`).
+const PBT_APMSUSPEND: u32 = 0x0004;
+const PBT_APMRESUMESUSPEND: u32 = 0x0007;
+const PBT_APMRESUMEAUTOMATIC: u32 = 0x0012;
+
+const ERROR_SUCCESS: u32 = 0;
+
+/// Heap-pinned so its address stays stable for the registration lifetime; the
+/// raw pointer is handed to the OS as the callback context.
+struct Context {
+    callback: PowerCallback,
+}
+
+pub(crate) struct Listener {
+    // Registration handle from `PowerRegisterSuspendResumeNotification`
+    // (a `*mut c_void`; cast to `HPOWERNOTIFY` for unregister).
+    handle: *mut c_void,
+    // Kept alive (and freed in `Drop`) because the OS holds a raw pointer to it.
+    ctx: *mut Context,
+}
+
+// The OS invokes the callback on an arbitrary thread; the handle is only used
+// to unregister. `PowerCallback` is `Send + Sync`.
+unsafe impl Send for Listener {}
+unsafe impl Sync for Listener {}
+
+impl Listener {
+    pub(crate) fn start(callback: PowerCallback) -> Option<Self> {
+        let ctx = Box::into_raw(Box::new(Context { callback }));
+
+        let mut params = DEVICE_NOTIFY_SUBSCRIBE_PARAMETERS {
+            Callback: Some(power_callback),
+            Context: ctx as *mut c_void,
+        };
+
+        let mut handle: *mut c_void = std::ptr::null_mut();
+        let status = unsafe {
+            PowerRegisterSuspendResumeNotification(
+                DEVICE_NOTIFY_CALLBACK,
+                &mut params as *mut DEVICE_NOTIFY_SUBSCRIBE_PARAMETERS as HANDLE,
+                &mut handle,
+            )
+        };
+
+        if status != ERROR_SUCCESS || handle.is_null() {
+            unsafe { drop(Box::from_raw(ctx)) };
+            return None;
+        }
+
+        Some(Self { handle, ctx })
+    }
+}
+
+impl Drop for Listener {
+    fn drop(&mut self) {
+        unsafe {
+            PowerUnregisterSuspendResumeNotification(self.handle as HPOWERNOTIFY);
+            drop(Box::from_raw(self.ctx));
+        }
+    }
+}
+
+unsafe extern "system" fn power_callback(
+    context: *const c_void,
+    event_type: u32,
+    _setting: *const c_void,
+) -> u32 {
+    // Safe: `context` is the live `Context` we registered with.
+    let ctx = unsafe { &*(context as *const Context) };
+    match event_type {
+        PBT_APMSUSPEND => (ctx.callback)(PowerEvent::WillSleep),
+        // A single resume can deliver both PBT_APMRESUMEAUTOMATIC and
+        // PBT_APMRESUMESUSPEND, so `DidWake` may fire twice per wake. That is
+        // fine and intentional: lowering the sleep gate is idempotent, so a
+        // duplicate wake is harmless — do not try to "dedupe" this later.
+        PBT_APMRESUMEAUTOMATIC | PBT_APMRESUMESUSPEND => (ctx.callback)(PowerEvent::DidWake),
+        _ => {}
+    }
+    ERROR_SUCCESS
+}
+
+pub(crate) fn current_power_state() -> crate::PowerState {
+    // No synchronous dark-wake query wired up on Windows; report Unknown so
+    // callers fall back to the suspend/resume notification path.
+    crate::PowerState::Unknown
+}