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/test_util.rs

@@ -0,0 +1,79 @@
+//! Shared test utilities for the pager crate.
+//!
+//! Compiled only in `#[cfg(test)]` builds. Import via `crate::test_util`.
+/// Minimal `AgentView` for unit tests outside the dispatch/handler modules
+/// (which keep their own richer factories).
+pub fn make_agent_view(session_id: Option<&str>, cwd: &str) -> crate::app::agent_view::AgentView {
+    use crate::app::agent::{AgentId, AgentSession, AgentState};
+    let (tx, _rx) = tokio::sync::mpsc::unbounded_channel();
+    let session = AgentSession {
+        id: AgentId(0),
+        acp_tx: tx,
+        session_id: session_id.map(agent_client_protocol::SessionId::new),
+        models: crate::acp::model_state::ModelState::default(),
+        state: AgentState::Idle,
+        tracker: crate::acp::tracker::AcpUpdateTracker::new(),
+        cwd: std::path::PathBuf::from(cwd),
+        is_worktree: false,
+        forked_from: None,
+        pending_prompts: std::collections::VecDeque::new(),
+        next_queue_id: 0,
+        yolo_mode: false,
+        auto_mode: false,
+        prompt_history: Vec::new(),
+        prompt_history_loading: false,
+        loading_replay: false,
+        restore_degree: None,
+        rate_limited: false,
+        model_incompatible: false,
+        credit_limit_blocked: false,
+        free_usage_blocked: false,
+        available_commands: Vec::new(),
+        available_commands_generation: 0,
+        available_tools: None,
+        model_switch_pending: false,
+        user_model_preference: None,
+        deferred_model_switch: None,
+        bg_tasks: std::collections::BTreeMap::new(),
+        bg_tool_call_to_task: std::collections::HashMap::new(),
+        scheduled_tasks: std::collections::HashMap::new(),
+        in_flight_prompt: None,
+        current_prompt_id: None,
+        created_via_new: false,
+    };
+    crate::app::agent_view::AgentView::new(
+        session,
+        crate::scrollback::state::ScrollbackState::new(),
+    )
+}
+/// RAII guard for temporarily overriding an environment variable.
+///
+/// Captures the original value on construction and restores it on drop.
+/// Used by theme and persist tests to redirect `HOME`/`USERPROFILE` to
+/// temp directories without affecting the real user config.
+pub struct EnvVarGuard {
+    key: &'static str,
+    original: Option<std::ffi::OsString>,
+}
+impl EnvVarGuard {
+    /// Override `key` to `value` (paths, URLs, flags — anything OsStr-able),
+    /// returning a guard that restores the original on drop.
+    pub fn set(key: &'static str, value: impl AsRef<std::ffi::OsStr>) -> Self {
+        let original = std::env::var_os(key);
+        unsafe {
+            std::env::set_var(key, value);
+        }
+        Self { key, original }
+    }
+}
+impl Drop for EnvVarGuard {
+    fn drop(&mut self) {
+        unsafe {
+            if let Some(value) = &self.original {
+                std::env::set_var(self.key, value);
+            } else {
+                std::env::remove_var(self.key);
+            }
+        }
+    }
+}