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v0.3.5: Private blob encryption, blob prefetch, intent-based filtering, crypto refactoring

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Private blob encryption:
- Encrypted posts (Friends/Circle/Direct) now encrypt attachment blobs with same CEK
- Public blobs unchanged, CID computed on ciphertext for private
- decrypt_blob_for_post/get_blob_for_post for transparent decryption on retrieval

Blob prefetch:
- Pull cycle and sync_with eagerly fetch missing blobs after post sync
- prefetch_blobs_from_peer scans for missing attachments, fetches via fallback chain
- Runs outside conn_mgr lock at Node level

Crypto refactoring:
- Extracted: encrypt/decrypt_bytes_with_cek, wrap/unwrap_cek_for_recipients
- unwrap_cek_for_recipient, unwrap_group_cek, random_cek
- encrypt_post_with_cek, encrypt_post_for_group_with_cek variants
- All existing functions refactored to delegate, 19 crypto tests pass

Intent-based filtering:
- intent_kind field on PostDto ("public"/"friends"/"circle"/"direct"/"unknown")
- Feed/MyPosts filter on intentKind !== 'direct' instead of visibility
- Messages filter with backward-compatible fallback for pre-intent posts
- get_post_intent storage method

IPC updates:
- resolve_blob_data helper using get_blob_for_post with network fallback
- sanitize_download_filename prevents path traversal
- get_blob_path accepts optional post_id_hex

Website:
- Mobile hamburger nav on all pages
- Mesh/Non-mesh N1 labels in network diagnostics

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Scott Reimers 2026-03-20 12:44:07 -04:00
parent 0abc244ee9
commit a41b11c0b8
14 changed files with 562 additions and 325 deletions
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website/tech.html
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@ -10,6 +10,7 @@
<body>
<nav>
<a href="index.html" class="logo">ItsGoin</a>
<button class="menu-toggle" onclick="this.parentElement.querySelector('.links').classList.toggle('open')" aria-label="Menu">&#9776;</button>
<div class="links">
<a href="index.html">About</a>
<a href="tech.html" class="active">How It Works</a>