docs: fix 30+ inaccuracies across documentation (#9023)

Cross-referenced all docs pages against the actual codebase and fixed:

Reference docs (cli-commands.md, slash-commands.md, profile-commands.md):
- Fix: hermes web -> hermes dashboard (correct subparser name)
- Fix: Wrong provider list (removed deepseek, ai-gateway, opencode-zen,
  opencode-go, alibaba; added gemini)
- Fix: Missing tts in hermes setup section choices
- Add: Missing --image flag for hermes chat
- Add: Missing --component flag for hermes logs
- Add: Missing CLI commands: debug, backup, import
- Fix: /status incorrectly marked as messaging-only (available everywhere)
- Fix: /statusbar moved from Session to Configuration category
- Add: Missing slash commands: /fast, /snapshot, /image, /debug
- Add: Missing /restart from messaging commands table
- Fix: /compress description to match COMMAND_REGISTRY
- Add: --no-alias flag to profile create docs

Configuration docs (configuration.md, environment-variables.md):
- Fix: Vision timeout default 30s -> 120s
- Fix: TTS providers missing minimax and mistral
- Fix: STT providers missing mistral
- Fix: TTS openai base_url shown with wrong default
- Fix: Compression config showing stale summary_model/provider/base_url
  keys (migrated out in config v17) -> target_ratio/protect_last_n

Getting-started docs:
- Fix: Redundant faster-whisper install (already in voice extra)
- Fix: Messaging extra description missing Slack

Developer guide:
- Fix: architecture.md tool count 48 -> 47, toolset count 40 -> 19
- Fix: run_agent.py line count 9,200 -> 10,700
- Fix: cli.py line count 8,500 -> 10,000
- Fix: main.py line count 5,500 -> 6,000
- Fix: gateway/run.py line count 7,500 -> 9,000
- Fix: Browser tools count 11 -> 10
- Fix: Platform adapter count 15 -> 18 (add wecom_callback, api_server)
- Fix: agent-loop.md wrong budget sharing (not shared, independent)
- Fix: agent-loop.md non-existent _get_budget_warning() reference
- Fix: context-compression-and-caching.md non-existent function name
- Fix: toolsets-reference.md safe toolset includes mixture_of_agents (it doesn't)
- Fix: toolsets-reference.md hermes-cli tool count 38 -> 36

Guides:
- Fix: automate-with-cron.md claims daily at 9am is valid (it's not)
- Fix: delegation-patterns.md Max 3 presented as hard cap (configurable)
- Fix: sessions.md group thread key format (shared by default, not per-user)
- Fix: cron-internals.md job ID format and JSON structure

website/docs/reference/slash-commands.md

@@ -34,7 +34,8 @@ Type `/` in the CLI to open the autocomplete menu. Built-in commands are case-in
 | `/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. |
 | `/resume [name]` | Resume a previously-named session |
-| `/statusbar` (alias: `/sb`) | Toggle the context/model status bar on or off |
+| `/status` | Show session info |
+| `/snapshot` (alias: `/snap`) | Create or restore state snapshots of Hermes config/state (usage: /snapshot [create\|restore \<id\>\|prune]) |
 | `/background <prompt>` (alias: `/bg`) | 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). |
 | `/btw <question>` | Ephemeral side question using session context (no tools, not persisted). Useful for quick clarifications without affecting the conversation history. |
 | `/plan [request]` | Load the bundled `plan` skill to write a markdown plan instead of executing the work. Plans are saved under `.hermes/plans/` relative to the active workspace/backend working directory. |
@@ -49,9 +50,11 @@ Type `/` in the CLI to open the autocomplete menu. Built-in commands are case-in
 | `/provider` | Show available providers and current provider |
 | `/personality` | Set a predefined personality |
 | `/verbose` | Cycle tool progress display: off → new → all → verbose. Can be [enabled for messaging](#notes) via config. |
+| `/fast` | Toggle fast mode — OpenAI Priority Processing / Anthropic Fast Mode (usage: /fast [normal\|fast\|status]) |
 | `/reasoning` | Manage reasoning effort and display (usage: /reasoning [level\|show\|hide]) |
 | `/fast [normal\|fast\|status]` | Toggle fast mode — OpenAI Priority Processing / Anthropic Fast Mode. Options: `normal`, `fast`, `status`, `on`, `off`. |
 | `/skin` | Show or change the display skin/theme |
+| `/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. |
 
@@ -147,6 +150,8 @@ The messaging gateway supports the following built-in commands inside Telegram,
 | `/deny` | Reject a pending dangerous command. |
 | `/update` | Update Hermes Agent to the latest version. |
 | `/restart` | Gracefully restart the gateway after draining active runs. When the gateway comes back online, it sends a confirmation to the requester's chat/thread. |
+| `/fast [normal\|fast\|status]` | Toggle fast mode — OpenAI Priority Processing / Anthropic Fast Mode. |
+| `/debug` | Upload debug report (system info + logs) and get shareable links. |
 | `/debug` | Upload debug report (system info + logs) and get shareable links. |
 | `/help` | Show messaging help. |
 | `/<skill-name>` | Invoke any installed skill by name. |