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/product/vision.md

@@ -0,0 +1,149 @@
+# Jobjakt Product Vision
+
+## Overview
+
+Jobjakt is a career management workspace designed to help people successfully navigate the modern job search.
+
+The application combines job tracking, career management, AI assistance, and document generation into one connected experience.
+
+The primary goal is to help users move from:
+
+Finding opportunities
+
+↓
+
+Applying effectively
+
+↓
+
+Managing applications
+
+↓
+
+Improving their chances
+
+↓
+
+Securing employment
+
+---
+
+# Long-Term Vision
+
+Jobjakt should become the user's personal career operating system.
+
+Instead of storing job applications in spreadsheets, CVs in random folders, and career information across multiple platforms, users maintain one central workspace.
+
+The application understands:
+
+- Their career history.
+- Their skills.
+- Their experience.
+- Their goals.
+- Their applications.
+
+It then helps transform this information into useful career outputs.
+
+---
+
+# Product Positioning
+
+Jobjakt is not:
+
+- A simple job board.
+- A basic Kanban board.
+- Only a CV generator.
+- Only an AI writing assistant.
+
+Jobjakt is:
+
+A career workspace that helps users manage the entire job application lifecycle.
+
+---
+
+# Core Product Pillars
+
+## 1. Job Tracking
+
+The foundation of the product.
+
+Users should be able to:
+
+- Store opportunities.
+- Track applications.
+- Manage stages.
+- Record communication.
+- Schedule follow-ups.
+- Understand their job search progress.
+
+---
+
+## 2. Career Workspace
+
+A supporting system built around one professional identity.
+
+Users maintain:
+
+- Career profile.
+- Skills.
+- Experience.
+- Education.
+- Projects.
+- Achievements.
+
+This becomes the source for career outputs.
+
+---
+
+## 3. AI Assistance
+
+AI should reduce effort.
+
+Examples:
+
+- Improve CV wording.
+- Analyse job descriptions.
+- Suggest improvements.
+- Generate cover letters.
+- Prepare interviews.
+
+AI should assist, not replace user control.
+
+---
+
+## 4. Document Generation
+
+Users should easily create:
+
+- CVs.
+- Tailored CVs.
+- Cover letters.
+- Public profiles.
+
+---
+
+# Product Evolution
+
+## Current
+
+Personal job tracking application.
+
+## Near Future
+
+Advanced career workspace.
+
+## Long Term
+
+SaaS career platform.
+
+---
+
+# Success Definition
+
+Jobjakt succeeds when users:
+
+- Apply to more suitable jobs.
+- Spend less time managing applications.
+- Produce higher-quality applications.
+- Feel organised during job searching.
+- Improve career outcomes.