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/user-guide/configuration.md

@@ -617,7 +617,7 @@ auxiliary:
     model: ""                  # e.g. "openai/gpt-4o", "google/gemini-2.5-flash"
     base_url: ""               # Custom OpenAI-compatible endpoint (overrides provider)
     api_key: ""                # API key for base_url (falls back to OPENAI_API_KEY)
-    timeout: 30                # seconds — LLM API call; increase for slow local vision models
+    timeout: 120               # seconds — LLM API call timeout; vision payloads need generous timeout
     download_timeout: 30       # seconds — image HTTP download; increase for slow connections
 
   # Web page summarization + browser page text extraction
@@ -674,7 +674,7 @@ auxiliary:
 ```
 
 :::tip
-Each auxiliary task has a configurable `timeout` (in seconds). Defaults: vision 30s, web_extract 360s, approval 30s, compression 120s. Increase these if you use slow local models for auxiliary tasks. Vision also has a separate `download_timeout` (default 30s) for the HTTP image download — increase this for slow connections or self-hosted image servers.
+Each auxiliary task has a configurable `timeout` (in seconds). Defaults: vision 120s, web_extract 360s, approval 30s, compression 120s. Increase these if you use slow local models for auxiliary tasks. Vision also has a separate `download_timeout` (default 30s) for the HTTP image download — increase this for slow connections or self-hosted image servers.
 :::
 
 :::info
@@ -851,7 +851,7 @@ agent:
 
 ```yaml
 tts:
-  provider: "edge"              # "edge" | "elevenlabs" | "openai" | "neutts" | "minimax"
+  provider: "edge"              # "edge" | "elevenlabs" | "openai" | "minimax" | "mistral" | "neutts"
   speed: 1.0                    # Global speed multiplier (fallback for all providers)
   edge:
     voice: "en-US-AriaNeural"   # 322 voices, 74 languages
@@ -866,6 +866,7 @@ tts:
     base_url: "https://api.openai.com/v1"  # Override for OpenAI-compatible TTS endpoints
   minimax:
     speed: 1.0                  # Speech speed multiplier
+    # base_url: ""              # Optional: override for OpenAI-compatible TTS endpoints
   neutts:
     ref_audio: ''
     ref_text: ''
@@ -947,7 +948,7 @@ Hashes are deterministic — the same user always maps to the same hash, so the
 
 ```yaml
 stt:
-  provider: "local"            # "local" | "groq" | "openai"
+  provider: "local"            # "local" | "groq" | "openai" | "mistral"
   local:
     model: "base"              # tiny, base, small, medium, large-v3
   openai:

website/docs/user-guide/sessions.md

@@ -327,7 +327,7 @@ On messaging platforms, sessions are keyed by a deterministic session key built
 | Discord DM | `agent:main:discord:dm:<chat_id>` | One session per DM chat |
 | WhatsApp DM | `agent:main:whatsapp:dm:<chat_id>` | One session per DM chat |
 | Group chat | `agent:main:<platform>:group:<chat_id>:<user_id>` | Per-user inside the group when the platform exposes a user ID |
-| Group thread/topic | `agent:main:<platform>:group:<chat_id>:<thread_id>:<user_id>` | Per-user inside that thread/topic |
+| Group thread/topic | `agent:main:<platform>:group:<chat_id>:<thread_id>` | Shared session for all thread participants (default). Per-user with `thread_sessions_per_user: true`. |
 | Channel | `agent:main:<platform>:channel:<chat_id>:<user_id>` | Per-user inside the channel when the platform exposes a user ID |
 
 When Hermes cannot get a participant identifier for a shared chat, it falls back to one shared session for that room.