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).

third_party/dagre_rust/src/lib.rs

@@ -0,0 +1,131 @@
+pub mod layout;
+
+use crate::layout::add_border_segments::BorderTypeName;
+use graphlib_rust::Edge;
+use ordered_hashmap::OrderedHashMap;
+
+#[allow(dead_code)]
+#[derive(Debug, Clone, Default)]
+pub struct GraphNode {
+    pub x: f32,
+    pub y: f32,
+    pub width: f32,
+    pub height: f32,
+    pub class: Option<String>,
+    pub label: Option<GraphEdge>,
+    pub padding: Option<f32>,
+    pub padding_x: Option<f32>,
+    pub padding_y: Option<f32>,
+    pub rx: Option<f32>,
+    pub ry: Option<f32>,
+    pub shape: Option<String>,
+    pub dummy: Option<String>,
+    pub rank: Option<i32>,
+    pub min_rank: Option<i32>,
+    pub max_rank: Option<i32>,
+    pub order: Option<usize>,
+    pub border_top: Option<String>,
+    pub border_bottom: Option<String>,
+    pub border_left: Option<OrderedHashMap<i32, String>>,
+    pub border_right: Option<OrderedHashMap<i32, String>>,
+    pub border_left_: Option<String>,
+    pub border_right_: Option<String>,
+    pub low: Option<usize>,
+    pub lim: Option<usize>,
+    pub parent: Option<String>,
+    pub e: Option<Edge>,
+    pub edge_label: Option<GraphEdge>,
+    pub edge_obj: Option<Edge>,
+    pub labelpos: Option<String>,
+    pub border_type: Option<BorderTypeName>,
+    pub self_edges: Vec<(Edge, GraphEdge)>,
+}
+
+#[derive(Debug, Clone, Default)]
+pub struct GraphEdgePoint {
+    pub x: f32,
+    pub y: f32,
+}
+
+#[allow(dead_code)]
+#[derive(Debug, Clone)]
+pub struct GraphEdge {
+    pub forward_name: Option<String>,
+    pub reversed: Option<bool>,
+    pub minlen: Option<f32>,
+    pub weight: Option<f32>,
+    pub width: Option<f32>,
+    pub height: Option<f32>,
+    pub label_rank: Option<i32>,
+    pub labeloffset: Option<f32>,
+    pub labelpos: Option<String>,
+    pub nesting_edge: Option<bool>,
+    pub cutvalue: Option<f32>,
+    pub points: Option<Vec<GraphEdgePoint>>,
+    pub x: f32,
+    pub y: f32,
+}
+
+#[allow(dead_code)]
+#[derive(Debug, Clone)]
+pub struct GraphConfig {
+    pub width: f32,
+    pub height: f32,
+
+    pub nodesep: Option<f32>,      // default 50
+    pub edgesep: Option<f32>,      // default 20
+    pub ranksep: Option<f32>,      // default 50
+    pub marginx: Option<f32>,      // default 0
+    pub marginy: Option<f32>,      // default 0
+    pub rankdir: Option<String>,   // lr, lr, tb, bt // default tb
+    pub acyclicer: Option<String>, // greedy, dfs, unknown-should-still-work
+    pub ranker: Option<String>, // "longest-path", "tight-tree", "network-simplex", "unknown-should-still-work"
+    pub align: Option<String>,
+    pub nesting_root: Option<String>, // id of dummy nesting root
+    pub root: Option<String>,
+    pub node_rank_factor: Option<f32>, // default 0
+    pub dummy_chains: Option<Vec<String>>,
+}
+
+impl Default for GraphConfig {
+    fn default() -> Self {
+        Self {
+            width: 0.0,
+            height: 0.0,
+            nodesep: Some(50.0),
+            edgesep: Some(20.0),
+            ranksep: Some(50.0),
+            marginx: None,
+            marginy: None,
+            rankdir: Some("tb".to_string()),
+            acyclicer: None,
+            ranker: None,
+            align: None,
+            nesting_root: None,
+            root: None,
+            node_rank_factor: None,
+            dummy_chains: None,
+        }
+    }
+}
+
+impl Default for GraphEdge {
+    fn default() -> Self {
+        Self {
+            forward_name: None,
+            reversed: None,
+            minlen: Some(1.0),
+            weight: Some(1.0),
+            width: Some(0.0),
+            height: Some(0.0),
+            label_rank: None,
+            labeloffset: Some(0.0),
+            labelpos: Some("r".to_string()),
+            nesting_edge: None,
+            cutvalue: None,
+            points: None,
+            x: 0.0,
+            y: 0.0,
+        }
+    }
+}