Add core modules, web frontend, CLI, keystore, and fieldkit

Core:
- paths.py: centralized ~/.soosef/ path constants
- config.py: JSON config loader with dataclass defaults
- exceptions.py: SoosefError hierarchy
- cli.py: unified Click CLI wrapping stegasoo + verisoo + native commands

Keystore:
- manager.py: unified key management (Ed25519 identity + channel keys)
- models.py: IdentityInfo, KeystoreStatus dataclasses
- export.py: encrypted key bundle export/import for USB transfer

Fieldkit:
- killswitch.py: ordered emergency data destruction (keys first)
- deadman.py: dead man's switch with check-in timer
- tamper.py: SHA-256 file integrity baseline + checking
- usb_monitor.py: pyudev USB whitelist enforcement
- geofence.py: haversine-based GPS boundary checking

Web frontend (Flask app factory + blueprints):
- app.py: create_app() factory with context processor
- blueprints: stego, attest, fieldkit, keys, admin
- templates: base.html (dark theme, unified nav), dashboard, all section pages
- static: CSS, favicon

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontends/web/templates/attest/attest.html

@@ -0,0 +1,11 @@
+{% extends "base.html" %}
+{% block title %}Attest — SooSeF{% endblock %}
+{% block content %}
+<h2><i class="bi bi-patch-check me-2"></i>Attest Image</h2>
+<p class="text-muted">Create a cryptographic provenance attestation — prove when, where, and by whom an image was captured.</p>
+<div class="alert alert-info">
+    <i class="bi bi-info-circle me-2"></i>
+    Verisoo attestation UI. Upload an image, optionally add metadata (location, caption),
+    and sign with your Ed25519 identity. The attestation is stored in the local append-only log.
+</div>
+{% endblock %}

frontends/web/templates/attest/log.html

@@ -0,0 +1,10 @@
+{% extends "base.html" %}
+{% block title %}Attestation Log — SooSeF{% endblock %}
+{% block content %}
+<h2><i class="bi bi-journal-text me-2"></i>Attestation Log</h2>
+<p class="text-muted">Recent attestations from the local append-only log.</p>
+<div class="alert alert-info">
+    <i class="bi bi-info-circle me-2"></i>
+    Lists attestation records with filters by attestor, date range, and verification status.
+</div>
+{% endblock %}

frontends/web/templates/attest/record.html

@@ -0,0 +1,11 @@
+{% extends "base.html" %}
+{% block title %}Attestation Record — SooSeF{% endblock %}
+{% block content %}
+<h2><i class="bi bi-file-earmark-check me-2"></i>Attestation Record</h2>
+<p class="text-muted">Record ID: <code>{{ record_id }}</code></p>
+<div class="alert alert-info">
+    <i class="bi bi-info-circle me-2"></i>
+    Attestation detail view — shows image hashes, signature, attestor fingerprint,
+    timestamp, and metadata.
+</div>
+{% endblock %}

frontends/web/templates/attest/verify.html

@@ -0,0 +1,12 @@
+{% extends "base.html" %}
+{% block title %}Verify — SooSeF{% endblock %}
+{% block content %}
+<h2><i class="bi bi-search me-2"></i>Verify Image</h2>
+<p class="text-muted">Check an image against attestation records using multi-algorithm hash matching.</p>
+<div class="alert alert-info">
+    <i class="bi bi-info-circle me-2"></i>
+    Verisoo verification UI. Upload an image to check against the attestation log.
+    Uses SHA-256 (exact) and perceptual hashes (pHash, dHash, aHash) for robustness
+    against compression and resizing.
+</div>
+{% endblock %}