F3: Kimi inference pipeline + full grok cloud-surface excision

Sampler / inference (PRD F3):
- kimi_compat.rs: single adaptation point for the Kimi chat/completions
  dialect (thinking-field mapping, model_id stripping, empty-content
  tool-call message fix, stream_options.include_usage), with kimi-cli
  source citations
- Rate-limit handling reworked for Kimi/Moonshot semantics; UA kigi/{version}
- /models replaces the xAI models-v2 endpoint everywhere; idle model
  refresh carries X-Msh-* device headers only (X-XAI-Token-Auth and
  x-grok-client-mode/CLIENT_MODE_HEADER machinery deleted)

Cloud-surface excision (PRD §5, zero-egress):
- remote/ conversations lane, cli-chat-proxy-types crate, prod/ dir,
  share command, credit bar: deleted (single local session lane;
  paginate() replaces merge_and_paginate)
- Subscription/tier gate stack deleted end-to-end: AppView
  gate/tier/team/ZDR fields, app/subscription.rs watch loop,
  dispatch/billing.rs paywall + SuperGrok upsell, free-usage-exhausted
  chain, tier-restricted commands, GateInfo, RemoteSettings gate fields,
  SettingsUpdateNotification gate fields
- /privacy + coding-data-sharing setting deleted (backed by a dead xAI
  RPC; Kigi is zero-egress — nothing to share or retain remotely)

Auth UX correctness (user-reported):
- Device-flow fixtures now mirror the live Kimi payload shape
  (https://www.kimi.com/code/authorize_device?user_code=..., verified
  against auth.kimi.com); the fabricated auth.kimi.com/device?code=...
  URLs are gone
- open_browser_detached is a no-op under cfg(test): unit tests drove
  wiremock fixture URLs into the real browser (root cause of the
  "garbage mock link" ABCD-1234 tabs)
- Welcome/pager-minimal rebrand: Grok Build -> Kigi, grok.com ->
  kimi.com, "Sign in to Grok" -> "Sign in to Kimi"

crates/codegen/kigi-shared/src/session/mod.rs

@@ -1,12 +1,44 @@
 use std::path::PathBuf;
 
+use serde::{Deserialize, Serialize};
+
 pub mod info;
 
 pub use info::Info;
 
-// Re-export shared feedback wire types used by downstream crates
-// (e.g. kigi-pager-render).
-pub use prod_mc_cli_chat_proxy_types::feedback_types::FeedbackTerminalInfo;
+/// Snapshot of the user's terminal environment at feedback time.
+///
+/// Shared here (rather than in kigi-shell) because kigi-pager-render builds it
+/// from its terminal probes and the shell attaches it to feedback records.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct FeedbackTerminalInfo {
+    /// Terminal emulator brand (e.g. "Ghostty", "iTerm2", "Unknown").
+    pub brand: String,
+    /// Multiplexer wrapping the session (e.g. "tmux", "Zellij", "None detected").
+    pub multiplexer: String,
+    /// Whether the session is over SSH.
+    pub is_ssh: bool,
+    /// Whether Byobu is wrapping the session.
+    pub is_byobu: bool,
+    /// Raw `TERM` environment variable value.
+    pub term_var: String,
+    /// tmux server version if inside tmux, otherwise "n/a".
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub tmux_version: Option<String>,
+    /// Hyperlink (OSC 8) support level (e.g. "native", "hostile_parser").
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub hyperlink_osc8_support: Option<String>,
+    /// Active clipboard legs, e.g. "native+osc52" or "native+tmux+osc52".
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub clipboard_route: Option<String>,
+    /// Native clipboard tool: "pbcopy", "wl-copy", "xclip", "xsel", "arboard".
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub clipboard_native_tool: Option<String>,
+    /// Display server: "wayland", "x11", "quartz", "win32", "unknown".
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub display_server: Option<String>,
+}
 
 pub fn session_dir(info: &Info) -> PathBuf {
     kigi_tools::util::kigi_home::sessions_cwd_dir(&info.cwd).join(info.id.to_string())