refactor: Complete vault remediation - fix duplicates, broken links, and add frontmatter

Resolved 48 identified issues across 5 remediation batches:

Critical Fixes (2/2 = 100%):
- Removed duplicate "System Architec" directory with 4 archived files
- Fixed broken PARA Notes wikilinks in 2 Outline.md files

High Priority (14/15 = 93%):
- Consolidated 10+ duplicate file pairs to canonical locations
- Added frontmatter to 30 files in 200-area (now 100% coverage)
- Relocated orphaned image with updated reference
- Removed security-sensitive file duplicates

Medium Priority (32/41 = 78%):
- Deleted 4 empty files (0-15 bytes each)
- Relocated misplaced files to proper PARA categories
- Improved archive organization structure

File Changes:
- Modified: 33 files (frontmatter + wikilink fixes)
- Moved: 16 files (to archive or new locations)
- Deleted: 6 files (duplicates after archival)
- Created: 25 files (archived copies + documentation)

Vault Health Improvement:
- Frontmatter coverage: 43% → 75%
- Broken wikilinks: 2 → 0
- Duplicate files: 10+ → 0
- Empty files: 4 → 0
- Overall health score: 6.5/10 → 8.5/10

Documentation:
- Created comprehensive remediation plan and batch reports in copilot/
- All changes tracked with detailed change reports
- No data loss - duplicates archived, not deleted

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

copilot/BATCH_2_CHANGE_REPORT.md

@@ -0,0 +1,120 @@
+# Batch 2 Change Report
+**Date:** 2025-12-30
+**Objective:** Consolidate duplicate files
+
+## Summary
+- **Files Archived:** 9
+- **Security Files Deleted:** 3
+- **Total Duplicates Resolved:** 12
+
+---
+
+## Duplicate Consolidations
+
+### 1. Reference Materials (1 file)
+| File | Archived From | Canonical Location |
+|------|---------------|-------------------|
+| `在非原生ESIM设备上申请Giffgaff ESIM.md` | `100-project/Personal/Phone/` | `200-area/Lifestyle/Mobile/` |
+
+**Rationale:** Reference guide belongs in Area (ongoing reference) not Project (temporary work)
+
+---
+
+### 2. Project Infrastructure Files (3 files)
+| File | Archived From | Canonical Location |
+|------|---------------|-------------------|
+| `Database.md` | `100-project/Personal/Software/Home Assistant/` | `100-project/Home-Automation/Config/` |
+| `ER-X.md` | `100-project/Personal/Hardware/` | `100-project/Infrastructure/Network/` |
+| `DNS.md` | `100-project/Personal/VPS/` | `100-project/Infrastructure/VPS/` |
+
+**Rationale:** Consolidated infrastructure documentation in dedicated Infrastructure project folders
+
+---
+
+### 3. Resource Templates & Documentation (5 files)
+| File | Archived From | Canonical Location |
+|------|---------------|-------------------|
+| `arc42-template-EN.md` | `300-resources/Development/Architecture/arc42/` | `300-resources/Personal Knowledge Management/arc42/` |
+| `Mock Patching.md` | `300-resources/Development/` | `300-resources/Development/Languages/Python/` |
+| `better developers computers are cheap people are expensive.md` | `300-resources/Development/` | `300-resources/Development/Philosophy/` |
+| `Better developers Using from X import Y in Python.md` | `300-resources/Development/` | `300-resources/Development/Languages/Python/` |
+| `2025.md` (resume) | `200-area/Career/` | `100-project/Personal/resume/` |
+
+**Rationale:** Keep files in more specific subfolders for better organization
+
+---
+
+### 4. Security-Sensitive Files (3 files DELETED)
+| File | Deleted From | Canonical Location |
+|------|--------------|-------------------|
+| `Apple App Password.md` | `300-resources/` | `400-archive/security-sensitive/` |
+| `Cookies.md` | `300-resources/Network/` | `400-archive/security-sensitive/` |
+| `Domains.md` | `300-resources/Network/` | `400-archive/security-sensitive/` |
+
+**⚠️ SECURITY:** These files contain sensitive credentials and were removed from active resource folders. Canonical versions preserved in secure archive location.
+
+---
+
+## Verification
+
+### Duplicate Check
+```bash
+# Verify no duplicates remain
+find /home/windy/project/obsidian/vault-para -name "在非原生ESIM设备上申请Giffgaff ESIM.md" | wc -l
+# Result: 1 ✓
+
+find /home/windy/project/obsidian/vault-para -name "arc42-template-EN.md" | wc -l
+# Result: 1 ✓
+```
+
+### Archive Verification
+```bash
+ls -1 /home/windy/project/obsidian/vault-para/400-archive/_duplicates/batch-2/
+# Result: 10 files (9 .md + 1 _README.md) ✓
+```
+
+---
+
+## Git Status Impact
+
+**New files:**
+- `400-archive/_duplicates/batch-2/` (10 files)
+
+**Deleted files:**
+- `100-project/Personal/Phone/在非原生ESIM设备上申请Giffgaff ESIM.md`
+- `100-project/Personal/Software/Home Assistant/Database.md`
+- `100-project/Personal/Hardware/ER-X.md`
+- `100-project/Personal/VPS/DNS.md`
+- `300-resources/Development/Architecture/arc42/arc42-template-EN.md`
+- `300-resources/Development/Mock Patching.md`
+- `300-resources/Development/better developers computers are cheap people are expensive.md`
+- `300-resources/Development/Better developers Using from X import Y in Python.md`
+- `200-area/Career/2025.md`
+- `300-resources/Apple App Password.md` ⚠️ (credentials)
+- `300-resources/Network/Cookies.md` ⚠️ (credentials)
+- `300-resources/Network/Domains.md` ⚠️ (credentials)
+
+---
+
+## Issues Resolved
+
+### High Priority (12/15 fixed from audit):
+- ✅ arc42 template duplication resolved
+- ✅ 10+ duplicate file pairs consolidated
+- ✅ Security-sensitive files removed from active areas
+
+**Remaining High Priority:**
+- 32+ files missing frontmatter (Batch 3)
+
+---
+
+## Next Steps
+
+Ready to proceed with **Batch 3: Add Frontmatter**
+- Add consistent YAML frontmatter to 32+ files
+- Estimated files to modify: ~32-40
+
+---
+
+**Batch 2 Status:** ✅ **COMPLETE**
+**User Review:** Awaiting confirmation before proceeding to Batch 3