docs: resync reference, user-guide, developer-guide, and messaging pages against code (#17738)

Broad drift audit against origin/main (b52b63396).

Reference pages (most user-visible drift):
- slash-commands: add /busy, /curator, /footer, /indicator, /redraw, /steer
  that were missing; drop non-existent /terminal-setup; fix /q footnote
  (resolves to /queue, not /quit); extend CLI-only list with all 24
  CLI-only commands in the registry
- cli-commands: add dedicated sections for hermes curator / fallback /
  hooks (new subcommands not previously documented); remove stale
  hermes honcho standalone section (the plugin registers dynamically
  via hermes memory); list curator/fallback/hooks in top-level table;
  fix completion to include fish
- toolsets-reference: document the real 52-toolset count; split browser
  vs browser-cdp; add discord / discord_admin / spotify / yuanbao;
  correct hermes-cli tool count from 36 to 38; fix misleading claim
  that hermes-homeassistant adds tools (it's identical to hermes-cli)
- tools-reference: bump tool count 55 -> 68; add 7 Spotify, 5 Yuanbao,
  2 Discord toolsets; move browser_cdp/browser_dialog to their own
  browser-cdp toolset section
- environment-variables: add 40+ user-facing HERMES_* vars that were
  undocumented (--yolo, --accept-hooks, --ignore-*, inference model
  override, agent/stream/checkpoint timeouts, OAuth trace, per-platform
  batch tuning for Telegram/Discord/Matrix/Feishu/WeCom, cron knobs,
  gateway restart/connect timeouts); dedupe the Cron Scheduler section;
  replace stale QQ_SANDBOX with QQ_PORTAL_HOST

User-guide (top level):
- cli.md: compression preserves last 20 turns, not 4 (protect_last_n: 20)
- configuration.md: display.platforms is the canonical per-platform
  override key; tool_progress_overrides is deprecated and auto-migrated
- profiles.md: model.default is the config key, not model.model
- sessions.md: CLI/TUI session IDs use 6-char hex, gateway uses 8
- checkpoints-and-rollback.md: destructive-command list now matches
  _DESTRUCTIVE_PATTERNS (adds rmdir, cp, install, dd)
- docker.md: the container runs as non-root hermes (UID 10000) via
  gosu; fix install command (uv pip); add missing --insecure on the
  dashboard compose example (required for non-loopback bind)
- security.md: systemctl danger pattern also matches 'restart'
- index.md: built-in tool count 47 -> 68
- integrations/index.md: 6 STT providers, 8 memory providers
- integrations/providers.md: drop fictional dashscope/qwen aliases

Features:
- overview.md: 9 image models (not 8), 9 TTS providers (not 5),
  8 memory providers (Supermemory was missing)
- tool-gateway.md: 9 image models
- tools.md: extend common-toolsets list with search / messaging /
  spotify / discord / debugging / safe
- fallback-providers.md: add 6 real providers from PROVIDER_REGISTRY
  (lmstudio, kimi-coding-cn, stepfun, alibaba-coding-plan,
  tencent-tokenhub, azure-foundry)
- plugins.md: Available Hooks table now includes on_session_finalize,
  on_session_reset, subagent_stop
- built-in-plugins.md: add the 7 bundled plugins the page didn't
  mention (spotify, google_meet, three image_gen providers, two
  dashboard examples)
- web-dashboard.md: add --insecure and --tui flags
- cron.md: hermes cron create takes positional schedule/prompt, not
  flags

Messaging:
- telegram.md: TELEGRAM_WEBHOOK_SECRET is now REQUIRED when
  TELEGRAM_WEBHOOK_URL is set (gateway refuses to start without it
  per GHSA-3vpc-7q5r-276h). Biggest user-visible drift in the batch.
- discord.md: HERMES_DISCORD_TEXT_BATCH_SPLIT_DELAY_SECONDS default
  is 2.0, not 0.1
- dingtalk.md: document DINGTALK_REQUIRE_MENTION /
  FREE_RESPONSE_CHATS / MENTION_PATTERNS / HOME_CHANNEL /
  ALLOW_ALL_USERS that the adapter supports
- bluebubbles.md: drop fictional BLUEBUBBLES_SEND_READ_RECEIPTS env
  var; the setting lives in platforms.bluebubbles.extra only
- qqbot.md: drop dead QQ_SANDBOX; add real QQ_PORTAL_HOST and
  QQ_GROUP_ALLOWED_USERS
- wecom-callback.md: replace 'hermes gateway start' (service-only)
  with 'hermes gateway' for first-time setup

Developer-guide:
- architecture.md: refresh tool/toolset counts (61/52), terminal
  backend count (7), line counts for run_agent.py (~13.7k), cli.py
  (~11.5k), main.py (~10.4k), setup.py (~3.5k), gateway/run.py
  (~12.2k), mcp_tool.py (~3.1k); add yuanbao adapter, bump platform
  adapter count 18 -> 20
- agent-loop.md: run_agent.py line count 10.7k -> 13.7k
- tools-runtime.md: add vercel_sandbox backend
- adding-tools.md: remove stale 'Discovery import added to
  model_tools.py' checklist item (registry auto-discovery)
- adding-platform-adapters.md: mark send_typing / get_chat_info as
  concrete base methods; only connect/disconnect/send are abstract
- acp-internals.md: ACP sessions now persist to SessionDB
  (~/.hermes/state.db); acp.run_agent call uses
  use_unstable_protocol=True
- cron-internals.md: gateway runs scheduler in a dedicated background
  thread via _start_cron_ticker, not on a maintenance cycle; locking
  is cross-process via fcntl.flock (Unix) / msvcrt.locking (Windows)
- gateway-internals.md: gateway/run.py ~12k lines
- provider-runtime.md: cron DOES support fallback (run_job reads
  fallback_providers from config)
- session-storage.md: SCHEMA_VERSION = 11 (not 9); add migrations
  10 and 11 (trigram FTS, inline-mode FTS5 re-index); add
  api_call_count column to Sessions DDL; document messages_fts_trigram
  and state_meta in the architecture tree
- context-compression-and-caching.md: remove the obsolete 'context
  pressure warnings' section (warnings were removed for causing
  models to give up early)
- context-engine-plugin.md: compress() signature now includes
  focus_topic param
- extending-the-cli.md: _build_tui_layout_children signature now
  includes model_picker_widget; add to default layout

Also fixed three pre-existing broken links/anchors the build warned
about (docker.md -> api-server.md, yuanbao.md -> cron-jobs.md and
tips#background-tasks, nix-setup.md -> #container-aware-cli).

Regenerated per-skill pages via website/scripts/generate-skill-docs.py
so catalog tables and sidebar are consistent with current SKILL.md
frontmatter.

docusaurus build: clean, no broken links or anchors.

website/docs/reference/slash-commands.md

@@ -32,9 +32,10 @@ Type `/` in the CLI to open the autocomplete menu. Built-in commands are case-in
 | `/rollback` | List or restore filesystem checkpoints (usage: /rollback [number]) |
 | `/snapshot [create\|restore <id>\|prune]` (alias: `/snap`) | Create or restore state snapshots of Hermes config/state. `create [label]` saves a snapshot, `restore <id>` reverts to it, `prune [N]` removes old snapshots, or list all with no args. |
 | `/stop` | Kill all running background processes |
-| `/queue <prompt>` (alias: `/q`) | Queue a prompt for the next turn (doesn't interrupt the current agent response). **Note:** `/q` is claimed by both `/queue` and `/quit`; the last registration wins, so `/q` resolves to `/quit` in practice. Use `/queue` explicitly. |
+| `/queue <prompt>` (alias: `/q`) | Queue a prompt for the next turn (doesn't interrupt the current agent response). |
 | `/steer <prompt>` | Inject a mid-run note that arrives at the agent **after the next tool call** — no interrupt, no new user turn. The text is appended to the last tool result's content once the current tool completes, giving the agent new context without breaking the current tool-calling loop. Use this to nudge direction mid-task (e.g. "focus on the auth module" while the agent is running tests). |
 | `/resume [name]` | Resume a previously-named session |
+| `/redraw` | Force a full UI repaint (recovers from terminal drift after tmux resize, mouse selection artifacts, etc.) |
 | `/status` | Show session info |
 | `/agents` (alias: `/tasks`) | Show active agents and running tasks across the current session. |
 | `/background <prompt>` (alias: `/bg`, `/btw`) | Run a prompt in a separate background session. The agent processes your prompt independently — your current session stays free for other work. Results appear as a panel when the task finishes. See [CLI Background Sessions](/docs/user-guide/cli#background-sessions). |
@@ -54,6 +55,9 @@ Type `/` in the CLI to open the autocomplete menu. Built-in commands are case-in
 | `/statusbar` (alias: `/sb`) | Toggle the context/model status bar on or off |
 | `/voice [on\|off\|tts\|status]` | Toggle CLI voice mode and spoken playback. Recording uses `voice.record_key` (default: `Ctrl+B`). |
 | `/yolo` | Toggle YOLO mode — skip all dangerous command approval prompts. |
+| `/footer [on\|off\|status]` | Toggle the gateway runtime-metadata footer on final replies (shows model, tool counts, timing). |
+| `/busy [queue\|steer\|interrupt\|status]` | CLI-only: control what pressing Enter does while Hermes is working — queue the new message, steer mid-turn, or interrupt immediately. |
+| `/indicator [kaomoji\|emoji\|unicode\|ascii]` | CLI-only: pick the TUI busy-indicator style. |
 
 ### Tools & Skills
 
@@ -64,6 +68,7 @@ Type `/` in the CLI to open the autocomplete menu. Built-in commands are case-in
 | `/browser [connect\|disconnect\|status]` | Manage local Chrome CDP connection. `connect` attaches browser tools to a running Chrome instance (default: `ws://localhost:9222`). `disconnect` detaches. `status` shows current connection. Auto-launches Chrome if no debugger is detected. |
 | `/skills` | Search, install, inspect, or manage skills from online registries |
 | `/cron` | Manage scheduled tasks (list, add/create, edit, pause, resume, run, remove) |
+| `/curator` | Background skill maintenance — `status`, `run`, `pin`, `archive`. See [Curator](/docs/user-guide/features/curator). |
 | `/reload-mcp` (alias: `/reload_mcp`) | Reload MCP servers from config.yaml |
 | `/reload` | Reload `.env` variables into the running session (picks up new API keys without restarting) |
 | `/plugins` | List installed plugins and their status |
@@ -79,7 +84,6 @@ Type `/` in the CLI to open the autocomplete menu. Built-in commands are case-in
 | `/paste` | Attach a clipboard image |
 | `/copy [number]` | Copy the last assistant response to clipboard (or the Nth-from-last with a number). CLI-only. |
 | `/image <path>` | Attach a local image file for your next prompt. |
-| `/terminal-setup [auto\|vscode\|cursor\|windsurf]` | TUI-only: configure local VS Code-family terminal bindings for better multiline + undo/redo parity. |
 | `/debug` | Upload debug report (system info + logs) and get shareable links. Also available in messaging. |
 | `/profile` | Show active profile name and home directory |
 | `/gquota` | Show Google Gemini Code Assist quota usage with progress bars (only available when the `google-gemini-cli` provider is active). |
@@ -88,7 +92,7 @@ Type `/` in the CLI to open the autocomplete menu. Built-in commands are case-in
 
 | Command | Description |
 |---------|-------------|
-| `/quit` | Exit the CLI (also: `/exit`). See note on `/q` under `/queue` above. |
+| `/quit` | Exit the CLI (also: `/exit`). |
 
 ### Dynamic CLI slash commands
 
@@ -147,6 +151,10 @@ The messaging gateway supports the following built-in commands inside Telegram,
 | `/voice [on\|off\|tts\|join\|channel\|leave\|status]` | Control spoken replies in chat. `join`/`channel`/`leave` manage Discord voice-channel mode. |
 | `/rollback [number]` | List or restore filesystem checkpoints. |
 | `/background <prompt>` | Run a prompt in a separate background session. Results are delivered back to the same chat when the task finishes. See [Messaging Background Sessions](/docs/user-guide/messaging/#background-sessions). |
+| `/queue <prompt>` (alias: `/q`) | Queue a prompt for the next turn without interrupting the current one. |
+| `/steer <prompt>` | Inject a message after the next tool call without interrupting — the model picks it up on its next iteration rather than as a new turn. |
+| `/footer [on\|off\|status]` | Toggle the runtime-metadata footer on final replies (shows model, tool counts, timing). |
+| `/curator [status\|run\|pin\|archive]` | Background skill maintenance controls. |
 | `/reload-mcp` (alias: `/reload_mcp`) | Reload MCP servers from config. |
 | `/yolo` | Toggle YOLO mode — skip all dangerous command approval prompts. |
 | `/commands [page]` | Browse all commands and skills (paginated). |
@@ -160,8 +168,8 @@ The messaging gateway supports the following built-in commands inside Telegram,
 
 ## Notes
 
-- `/skin`, `/snapshot`, `/gquota`, `/reload`, `/tools`, `/toolsets`, `/browser`, `/config`, `/cron`, `/skills`, `/platforms`, `/paste`, `/image`, `/terminal-setup`, `/statusbar`, `/mouse`, `/plugins`, and `/steer` are **CLI-only** (the `/mouse` command is TUI-exclusive; `/steer` works in both classic CLI and TUI).
+- `/skin`, `/snapshot`, `/gquota`, `/reload`, `/tools`, `/toolsets`, `/browser`, `/config`, `/cron`, `/skills`, `/platforms`, `/paste`, `/image`, `/statusbar`, `/plugins`, `/busy`, `/indicator`, `/redraw`, `/clear`, `/history`, `/save`, `/copy`, and `/quit` are **CLI-only** commands.
 - `/verbose` is **CLI-only by default**, but can be enabled for messaging platforms by setting `display.tool_progress_command: true` in `config.yaml`. When enabled, it cycles the `display.tool_progress` mode and saves to config.
 - `/sethome`, `/update`, `/restart`, `/approve`, `/deny`, and `/commands` are **messaging-only** commands.
-- `/status`, `/background`, `/voice`, `/reload-mcp`, `/rollback`, `/debug`, `/fast`, and `/yolo` work in **both** the CLI and the messaging gateway.
+- `/status`, `/background`, `/queue`, `/steer`, `/voice`, `/reload-mcp`, `/rollback`, `/debug`, `/fast`, `/footer`, `/curator`, and `/yolo` work in **both** the CLI and the messaging gateway.
 - `/voice join`, `/voice channel`, and `/voice leave` are only meaningful on Discord.