docs: comprehensive update for recent merged PRs (#9019)

Audit and update documentation across 12 files to match changes from
~50 recently merged PRs. Key updates:

Slash commands (slash-commands.md):
- Add 5 missing commands: /snapshot, /fast, /image, /debug, /restart
- Fix /status incorrectly labeled as messaging-only (available in both)
- Add --global flag to /model docs
- Add [focus topic] arg to /compress docs

CLI commands (cli-commands.md):
- Add hermes debug share section with options and examples
- Add hermes backup section with --quick and --label flags
- Add hermes import section

Feature docs:
- TTS: document global tts.speed and per-provider speed for Edge/OpenAI
- Web dashboard: add docs for 5 missing pages (Sessions, Logs,
  Analytics, Cron, Skills) and 15+ API endpoints
- WhatsApp: add streaming, 4K chunking, and markdown formatting docs
- Skills: add GitHub rate-limit/GITHUB_TOKEN troubleshooting tip
- Budget: document CLI notification on iteration budget exhaustion

Config migration (compression.summary_* → auxiliary.compression.*):
- Update configuration.md, environment-variables.md,
  fallback-providers.md, cli.md, and context-compression-and-caching.md
- Replace legacy compression.summary_model/provider/base_url references
  with auxiliary.compression.model/provider/base_url
- Add legacy migration info boxes explaining auto-migration

Minor fixes:
- wecom-callback.md: clarify 'text only' limitation (input only)
- Escape {session_id}/{job_id} in web-dashboard.md headings for MDX

website/docs/reference/cli-commands.md

@@ -44,6 +44,9 @@ hermes [global-options] <command> [subcommand/options]
 | `hermes webhook` | Manage dynamic webhook subscriptions for event-driven activation. |
 | `hermes doctor` | Diagnose config and dependency issues. |
 | `hermes dump` | Copy-pasteable setup summary for support/debugging. |
+| `hermes debug` | Debug tools — upload logs and system info for support. |
+| `hermes backup` | Back up Hermes home directory to a zip file. |
+| `hermes import` | Restore a Hermes backup from a zip file. |
 | `hermes logs` | View, tail, and filter agent/gateway/error log files. |
 | `hermes config` | Show, edit, migrate, and query configuration files. |
 | `hermes pairing` | Approve or revoke messaging pairing codes. |
@@ -355,6 +358,70 @@ config_overrides:
 `hermes dump` is specifically designed for sharing. For interactive diagnostics, use `hermes doctor`. For a visual overview, use `hermes status`.
 :::
 
+## `hermes debug`
+
+```bash
+hermes debug share [options]
+```
+
+Upload a debug report (system info + recent logs) to a paste service and get a shareable URL. Useful for quick support requests — includes everything a helper needs to diagnose your issue.
+
+| Option | Description |
+|--------|-------------|
+| `--lines <N>` | Number of log lines to include per log file (default: 200). |
+| `--expire <days>` | Paste expiry in days (default: 7). |
+| `--local` | Print the report locally instead of uploading. |
+
+The report includes system info (OS, Python version, Hermes version), recent agent and gateway logs (512 KB limit per file), and redacted API key status. Keys are always redacted — no secrets are uploaded.
+
+Paste services tried in order: paste.rs, dpaste.com.
+
+### Examples
+
+```bash
+hermes debug share              # Upload debug report, print URL
+hermes debug share --lines 500  # Include more log lines
+hermes debug share --expire 30  # Keep paste for 30 days
+hermes debug share --local      # Print report to terminal (no upload)
+```
+
+## `hermes backup`
+
+```bash
+hermes backup [options]
+```
+
+Create a zip archive of your Hermes configuration, skills, sessions, and data. The backup excludes the hermes-agent codebase itself.
+
+| Option | Description |
+|--------|-------------|
+| `-o`, `--output <path>` | Output path for the zip file (default: `~/hermes-backup-<timestamp>.zip`). |
+| `-q`, `--quick` | Quick snapshot: only critical state files (config.yaml, state.db, .env, auth, cron jobs). Much faster than a full backup. |
+| `-l`, `--label <name>` | Label for the snapshot (only used with `--quick`). |
+
+The backup uses SQLite's `backup()` API for safe copying, so it works correctly even when Hermes is running (WAL-mode safe).
+
+### Examples
+
+```bash
+hermes backup                           # Full backup to ~/hermes-backup-*.zip
+hermes backup -o /tmp/hermes.zip        # Full backup to specific path
+hermes backup --quick                   # Quick state-only snapshot
+hermes backup --quick --label "pre-upgrade"  # Quick snapshot with label
+```
+
+## `hermes import`
+
+```bash
+hermes import <zipfile> [options]
+```
+
+Restore a previously created Hermes backup into your Hermes home directory.
+
+| Option | Description |
+|--------|-------------|
+| `-f`, `--force` | Overwrite existing files without confirmation. |
+
 ## `hermes logs`
 
 ```bash