docs: Epic-001 v1.2 — Implementation plan + Development rules

- Added Vision: 'LandveX Intelligence Lab is the internal factory where
  raw reality is refined into verified Control Intelligence'
- Added Architecture Goal: Every artifact traceable backward to source
  and forward to decision
- Added Development Rule: No Story starts with UI. Order: Domain model →
  API → Storage → Tests → UI
- Added Story 1 implementation plan with 5 PRs:
  PR-001: Domain Model (Mission, MissionAsset, Upload, types)
  PR-002: Storage (S3/R2 bucket, PostgreSQL metadata, checksums, EXIF, GPS)
  PR-003: API (POST /missions, POST /missions/{id}/assets, GET /missions)
  PR-004: Events (MissionCreated, AssetUploaded, RawDatasetReady)
  PR-005: UI (simple drag-and-drop upload with progress)
- Added Definition of Done for Story 1:
  Phone → Video → Upload → Bucket → Metadata → Mission visible in Dataset Explorer
- Added ID Convention: mission_YYYYMMDD_NNNNNN, asset_NNNNNN, obs_NNNNNN,
  decision_NNNNNN. Never UUID in UI.
- Added Artifact Viewer: show raw asset metadata, hash, GPS, EXIF,
  storage location, version for debugging

Rationale: Clean architecture, testable without UI, traceable artifacts.

docs/design/EPIC-001-First-Verified-Decision.md

@@ -371,6 +371,160 @@ These are important but don't help reach the first verified workflow.
 
 ---
 
-## STATUS
+## Vision
 
-**READY FOR DEVELOPMENT**
+**LandveX Intelligence Lab is the internal factory where raw reality is refined into verified Control Intelligence.**
+
+**Architecture Goal:** Every artifact must be traceable backward to its source and forward to its decision.
+
+## Development Rule
+
+**No Story may start with UI. Every Story starts with:**
+1. Domain model
+2. API
+3. Storage
+4. Tests
+5. UI
+
+This keeps architecture clean and allows testing each part without frontend.
+
+## Story 1: Mission Import — Implementation Plan
+
+### PR-001: Domain Model
+
+```typescript
+// Mission
+interface Mission {
+  id: string;           // mission_20260814_000123
+  status: MissionStatus;
+  location: Location;
+  device: Device;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+// MissionAsset
+interface MissionAsset {
+  id: string;           // asset_000456
+  missionId: string;
+  type: AssetType;      // image | video
+  storagePath: string;
+  checksum: string;
+  sizeBytes: number;
+  mimeType: string;
+  metadata: AssetMetadata;
+  createdAt: Date;
+}
+
+// AssetMetadata
+interface AssetMetadata {
+  exif: ExifData;
+  gps: GpsCoordinates;
+  device: DeviceInfo;
+}
+
+// Upload
+interface Upload {
+  id: string;
+  missionId: string;
+  status: UploadStatus;
+  progress: number;
+  startedAt: Date;
+  completedAt?: Date;
+}
+
+// Enums
+type MissionStatus = 'created' | 'uploading' | 'processing' | 'completed' | 'failed';
+type AssetType = 'image' | 'video';
+type UploadStatus = 'pending' | 'in_progress' | 'completed' | 'failed';
+```
+
+### PR-002: Storage
+
+- Upload to bucket (S3/R2)
+- Metadata in PostgreSQL
+- Checksums (SHA-256)
+- File size
+- MIME type
+- EXIF extraction
+- GPS parsing
+- **No AI yet**
+
+### PR-003: API
+
+```
+POST   /missions
+POST   /missions/{id}/assets
+GET    /missions/{id}
+GET    /missions
+```
+
+### PR-004: Events
+
+```
+MissionCreated
+↓
+AssetUploaded
+↓
+RawDatasetReady
+```
+
+**No pipeline yet. Just events.**
+
+### PR-005: UI
+
+Extremely simple:
+
+```
+Mission Import
+
+[Drag files] or [Choose files]
+
+[Upload]
+
+Progress: ████████░░ 80%
+
+Done! Mission mission_20260814_000123 created.
+```
+
+### Definition of Done (Story 1)
+
+```
+Phone → Video → Upload → Bucket → Metadata → Mission visible in Dataset Explorer
+```
+
+This is the first proof.
+
+## ID Convention
+
+**Never UUID in UI. UUID internally.**
+
+| Entity | ID Format | Example |
+|--------|-----------|---------|
+| Mission | `mission_YYYYMMDD_NNNNNN` | `mission_20260814_000123` |
+| Asset | `asset_NNNNNN` | `asset_000456` |
+| Observation | `obs_NNNNNN` | `obs_000981` |
+| Decision | `decision_NNNNNN` | `decision_000044` |
+
+## Artifact Viewer
+
+When clicking a file, show:
+
+```
+Raw Asset
+├── Filename: IMG_20260814_143052.jpg
+├── Size: 4.2 MB
+├── MIME: image/jpeg
+├── Hash: sha256:a3f7...
+├── GPS: 59.2371, 18.1456
+├── EXIF: Device=iPhone14,2, ISO=100, Exposure=1/120s
+├── Created: 2026-08-14 14:30:52 UTC
+├── Storage: s3://landvex-raw/2026/08/14/mission_20260814_000123/
+└── Version: 1
+```
+
+Saves enormous time during debugging.
+
+## Status
+
+**READY FOR DEVELOPMENT — PR-001: Domain Model**