fix(website): correct false claims and stale numbers in live docs

- Landing: replace nonexistent `mempalace remember` CLI demo with real
  `mempalace mine ./notes`
- Landing: soften unverifiable absolutes ("forever available",
  "100% recall by design", "<50 ms", "90%+ compression",
  "two-thousand-year-old", "tens of thousands of entries")
- MCP tool count: 19 → 29 across mcp-integration, claude-code, openclaw,
  and modules; expand tool overview with Drawers, Tunnels, and System
  categories to match mcp_server.py
- Wake-up token range: ~170–900 → ~600–900 in cli/api-reference/python-api
  to match cli.py help text and concept docs
- Gemini CLI: move `--scope user` before target name and add `--`
  separator so `-m mempalace.mcp_server` isn't parsed as Gemini flags

website/guide/gemini-cli.md

@@ -40,12 +40,14 @@ You can optionally create or edit:
 Register MemPalace as an MCP server:
 
 ```bash
-gemini mcp add mempalace /absolute/path/to/mempalace/.venv/bin/python3 \
-  -m mempalace.mcp_server --scope user
+gemini mcp add --scope user mempalace \
+  -- /absolute/path/to/mempalace/.venv/bin/python -m mempalace.mcp_server
 ```
 
 ::: warning
-Use the **absolute path** to the Python binary to ensure it works from any directory.
+Use the **absolute path** to the Python binary so the server starts from any
+working directory. The `--` separator prevents Gemini from parsing
+`-m mempalace.mcp_server` as its own flags.
 :::
 
 ## Enable Auto-Saving