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/ux/onboarding.md

@@ -0,0 +1,181 @@
+# User Onboarding Experience
+
+## Purpose
+
+Define how new users should experience Jobjakt from registration to first successful job application workflow.
+
+The onboarding goal is not to show every feature.
+
+The goal is to quickly help users achieve value.
+
+---
+
+# Core Principle
+
+The user should understand:
+
+"Jobjakt helps me organise my job search and create better applications."
+
+within the first few minutes.
+
+---
+
+# Current Ideal Flow
+
+## Step 1 - Registration
+
+Supported:
+
+- Email/password registration.
+- Google registration.
+- Microsoft registration.
+
+After registration:
+
+Create user account.
+
+Verify email where required.
+
+Redirect to onboarding.
+
+---
+
+# Step 2 - Profile Creation
+
+Collect basic information:
+
+Required:
+
+- Name.
+- Email.
+
+Optional:
+
+- Profile picture.
+- Location.
+- Professional title.
+
+Avoid asking unnecessary questions.
+
+---
+
+# Step 3 - Import Career Information
+
+Prompt user:
+
+"Do you already have a CV?"
+
+Options:
+
+## Upload CV
+
+Supported:
+
+- PDF.
+- DOCX.
+- Common CV formats.
+
+System:
+
+- Extracts information.
+- Creates structured career profile.
+- Allows user review.
+
+---
+
+## Create Manually
+
+User builds:
+
+- Experience.
+- Skills.
+- Education.
+
+---
+
+# Step 4 - Connect Email
+
+Optional.
+
+Purpose:
+
+Enable:
+
+- Email tracking.
+- Application communication.
+
+Supported providers:
+
+- Gmail.
+- Microsoft.
+- IMAP.
+
+Do not block the user.
+
+---
+
+# Step 5 - Add First Job
+
+Guide user through:
+
+Import job URL.
+
+↓
+
+Extract details.
+
+↓
+
+Review information.
+
+↓
+
+Create application.
+
+---
+
+# Step 6 - Create Application Documents
+
+Optional workflow:
+
+CV
+
+↓
+
+Cover Letter
+
+↓
+
+Portfolio
+
+↓
+
+Additional files
+
+Users can skip any step.
+
+---
+
+# Onboarding Rules
+
+Never:
+
+- Force users through long forms.
+- Require optional information.
+- Hide the skip option.
+
+Always:
+
+- Show progress.
+- Explain benefits.
+- Provide clear next actions.
+
+---
+
+# First Success Moment
+
+The user should reach:
+
+"I have my first job application tracked."
+
+as quickly as possible.