docs: reorganize tree, restore architecture + research from archive, add Phase 0 reports

Active docs/ was stub scaffolding while the real docs sat in docs/_archive/.
Restore and correct them, and record the Phase 0 work.

- docs/architecture/current.md: verified system map (from archived SYSTEM_OVERVIEW,
  9 corrections against code).
- docs/research/competitors.md: sourced competitor analysis (from archived
  PRODUCT_RESEARCH, feature matrix corrected).
- docs/decisions/ADR-002-job-application-model.md: the Job/JobApplication split.
- docs/application-discovery-report.md, docs/implementation-roadmap.md,
  docs/phase-0-foundation-report.md, docs/career-workspace-branch-assessment.md.
- Remove 10 zero-byte placeholder files that advertised content that never existed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/research/flowcv-analysis.md

@@ -0,0 +1,89 @@
+# flowcv
+
+TODO: Complete documentation.
+# FlowCV Analysis
+
+## Purpose
+
+Analyse FlowCV's CV builder experience.
+
+Reference:
+
+https://flowcv.com/
+
+---
+
+# Key Concepts
+
+FlowCV provides:
+
+- Template-based CV creation.
+- Structured editing.
+- Live preview.
+- Design customisation.
+- Export functionality.
+
+---
+
+# Important UX Patterns
+
+## Content / Design Separation
+
+Users edit content separately from appearance.
+
+---
+
+## Template Switching
+
+Users can change design without recreating content.
+
+This aligns with Jobjakt:
+
+Career Profile
+
+↓
+
+CV
+
+↓
+
+Theme
+
+---
+
+## Builder Structure
+
+Important concepts:
+
+Content.
+
+Design.
+
+Preview.
+
+Export.
+
+---
+
+# Features To Consider
+
+- Section management.
+- Theme selection.
+- Typography controls.
+- Colour controls.
+- Layout controls.
+- AI assistance.
+
+---
+
+# Jobjakt Adaptation
+
+Do not copy directly.
+
+Adapt around:
+
+Job applications.
+
+Tailoring.
+
+Career history.