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/views/status_bar.rs

@@ -0,0 +1,93 @@
+//! StatusBar widget - displays context info at the top.
+
+use ratatui::buffer::Buffer;
+use ratatui::layout::Rect;
+use ratatui::style::Style;
+use ratatui::text::Span;
+use ratatui::widgets::Widget;
+
+use crate::theme::Theme;
+
+/// Status bar showing context information.
+///
+/// Displays: token count, current turn, view mode, etc.
+/// Respects layout: first 3 cols and last 2 cols are empty.
+pub struct StatusBar<'a> {
+    /// Left-aligned content (e.g., "Context: 5.2k tokens")
+    pub left: &'a str,
+    /// Center content (e.g., "Turn 2/3")
+    pub center: Option<&'a str>,
+    /// Right-aligned content (e.g., view mode indicator)
+    pub right: Option<&'a str>,
+}
+
+impl<'a> StatusBar<'a> {
+    /// Create a new status bar with left content.
+    pub fn new(left: &'a str) -> Self {
+        Self {
+            left,
+            center: None,
+            right: None,
+        }
+    }
+
+    /// Add center content.
+    pub fn center(mut self, text: &'a str) -> Self {
+        self.center = Some(text);
+        self
+    }
+
+    /// Add right content.
+    pub fn right(mut self, text: &'a str) -> Self {
+        self.right = Some(text);
+        self
+    }
+}
+
+impl Widget for StatusBar<'_> {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        if area.height == 0 {
+            return;
+        }
+
+        let theme = Theme::current();
+
+        // Layout: outer block already has 2-char horizontal padding
+        // No additional margins needed
+        let left_margin = 0u16;
+        let right_margin = 0u16;
+        let content_x = area.x + left_margin;
+        let content_width = area.width.saturating_sub(left_margin + right_margin);
+
+        if content_width < 10 {
+            return;
+        }
+
+        let style = Style::default().fg(theme.gray).bg(theme.bg_base);
+
+        // Fill background (the whole row)
+        buf.set_style(area, Style::default().bg(theme.bg_base));
+
+        // Left content
+        let left_span = Span::styled(self.left, style);
+        buf.set_span(content_x, area.y, &left_span, content_width);
+
+        // Center content (if fits)
+        if let Some(center) = self.center {
+            let center_width = center.len() as u16;
+            let center_x = content_x + (content_width.saturating_sub(center_width)) / 2;
+            if center_x > content_x + self.left.len() as u16 + 2 {
+                let center_span = Span::styled(center, style);
+                buf.set_span(center_x, area.y, &center_span, center_width);
+            }
+        }
+
+        // Right content
+        if let Some(right) = self.right {
+            let right_width = right.len() as u16;
+            let right_x = content_x + content_width.saturating_sub(right_width);
+            let right_span = Span::styled(right, style);
+            buf.set_span(right_x, area.y, &right_span, right_width);
+        }
+    }
+}