feat: browser console/errors tool, annotated screenshots, auto-recording, and dogfood QA skill

New browser capabilities and a built-in skill for agent-driven web QA.

## New tool: browser_console

Returns console messages (log/warn/error/info) AND uncaught JavaScript
exceptions in a single call. Uses agent-browser's 'console' and 'errors'
commands through the existing session plumbing. Supports --clear to reset
buffers. Verified working in both local and Browserbase cloud modes.

## Enhanced tool: browser_vision(annotate=True)

New boolean parameter on browser_vision. When true, agent-browser overlays
numbered [N] labels on interactive elements — each [N] maps to ref @eN.
Annotation data (element name, role, bounding box) returned alongside the
vision analysis. Useful for QA reports and spatial reasoning.

## Config: browser.record_sessions

Auto-record browser sessions as WebM video files when enabled:
- Starts recording on first browser_navigate
- Stops and saves on browser_close
- Saves to ~/.hermes/browser_recordings/
- Works in both local and cloud modes (verified)
- Disabled by default

## Built-in skill: dogfood

Systematic exploratory QA testing for web applications. Teaches the agent
a 5-phase workflow:
1. Plan — accept URL, create output dirs, set scope
2. Explore — systematic crawl with annotated screenshots
3. Collect Evidence — screenshots, console errors, JS exceptions
4. Categorize — severity (Critical/High/Medium/Low) and category
   (Functional/Visual/Accessibility/Console/UX/Content)
5. Report — structured markdown with per-issue evidence

Includes:
- skills/dogfood/SKILL.md — full workflow instructions
- skills/dogfood/references/issue-taxonomy.md — severity/category defs
- skills/dogfood/templates/dogfood-report-template.md — report template

## Tests

21 new tests covering:
- browser_console message/error parsing, clear flag, empty/failed states
- browser_console schema registration
- browser_vision annotate schema and flag passing
- record_sessions config defaults and recording lifecycle
- Dogfood skill file existence and content validation

Addresses #315.

skills/dogfood/templates/dogfood-report-template.md

@@ -0,0 +1,86 @@
+# Dogfood QA Report
+
+**Target:** {target_url}
+**Date:** {date}
+**Scope:** {scope_description}
+**Tester:** Hermes Agent (automated exploratory QA)
+
+---
+
+## Executive Summary
+
+| Severity | Count |
+|----------|-------|
+| 🔴 Critical | {critical_count} |
+| 🟠 High | {high_count} |
+| 🟡 Medium | {medium_count} |
+| 🔵 Low | {low_count} |
+| **Total** | **{total_count}** |
+
+**Overall Assessment:** {one_sentence_assessment}
+
+---
+
+## Issues
+
+<!-- Repeat this section for each issue found, sorted by severity (Critical first) -->
+
+### Issue #{issue_number}: {issue_title}
+
+| Field | Value |
+|-------|-------|
+| **Severity** | {severity} |
+| **Category** | {category} |
+| **URL** | {url_where_found} |
+
+**Description:**
+{detailed_description_of_the_issue}
+
+**Steps to Reproduce:**
+1. {step_1}
+2. {step_2}
+3. {step_3}
+
+**Expected Behavior:**
+{what_should_happen}
+
+**Actual Behavior:**
+{what_actually_happens}
+
+**Screenshot:**
+MEDIA:{screenshot_path}
+
+**Console Errors** (if applicable):
+```
+{console_error_output}
+```
+
+---
+
+<!-- End of per-issue section -->
+
+## Issues Summary Table
+
+| # | Title | Severity | Category | URL |
+|---|-------|----------|----------|-----|
+| {n} | {title} | {severity} | {category} | {url} |
+
+## Testing Coverage
+
+### Pages Tested
+- {list_of_pages_visited}
+
+### Features Tested
+- {list_of_features_exercised}
+
+### Not Tested / Out of Scope
+- {areas_not_covered_and_why}
+
+### Blockers
+- {any_issues_that_prevented_testing_certain_areas}
+
+---
+
+## Notes
+
+{any_additional_observations_or_recommendations}