docs: fix CHANGELOG ordering + README architecture counts

- CHANGELOG: reorder v0.50.19/v0.50.20/v0.50.21 to correct newest-first
  (v0.50.19 was mistakenly at the top above v0.50.21 and v0.50.20)
- README: fix architecture block test count 51 files/802 functions → 61 files/961
- README: update line counts to actual wc -l values:
  routes.py ~2250, streaming.py ~660, ui.js ~1740,
  messages.js ~655, sessions.js ~800

Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>

CHANGELOG.md

@@ -5,11 +5,6 @@
 
 ---
 
-## [v0.50.19] Fix UnicodeEncodeError when downloading files with non-ASCII filenames (PR #378)
-
-- **Workspace file downloads no longer crash for Unicode filenames** (`api/routes.py`): Clicking a PDF or other file with Chinese, Japanese, Arabic, or other non-ASCII characters in its name caused a `UnicodeEncodeError` because Python's HTTP server requires header values to be latin-1 encodable. A new `_content_disposition_value(disposition, filename)` helper centralises `Content-Disposition` generation: it strips CR/LF (injection guard), builds an ASCII fallback for the legacy `filename=` parameter (non-ASCII chars replaced with `_`), and preserves the full UTF-8 name in `filename*=UTF-8''...` per RFC 5987. Both `attachment` and `inline` responses use it.
-  - 2 new integration tests in `tests/test_sprint29.py` covering Chinese filenames for both download and inline responses, verifying the header is latin-1 encodable and `filename*=UTF-8''` is present; 924 tests total (up from 922)
-
 ## [v0.50.21] Live reasoning, tool progress, and in-flight session recovery (PR #367)
 
 - **Durable inflight reload recovery** (`static/ui.js`, `static/messages.js`): `saveInflightState` / `loadInflightState` / `clearInflightState` backed by `localStorage` (`hermes-webui-inflight-state` key, per-session, 10-minute TTL). Snapshots are saved on every token, tool event, and tool completion, and cleared when the run ends/errors/cancels. On a full page reload with an active stream, `loadSession()` hydrates from the snapshot before calling `attachLiveStream(..., {reconnecting:true})` — partial messages, live tool cards, and reasoning text all survive the reload.
@@ -40,6 +35,11 @@
   - 25 new tests in `tests/test_issues_373_374_375.py`; 949 tests total (up from 924)
 
 
+## [v0.50.19] Fix UnicodeEncodeError when downloading files with non-ASCII filenames (PR #378)
+
+- **Workspace file downloads no longer crash for Unicode filenames** (`api/routes.py`): Clicking a PDF or other file with Chinese, Japanese, Arabic, or other non-ASCII characters in its name caused a `UnicodeEncodeError` because Python's HTTP server requires header values to be latin-1 encodable. A new `_content_disposition_value(disposition, filename)` helper centralises `Content-Disposition` generation: it strips CR/LF (injection guard), builds an ASCII fallback for the legacy `filename=` parameter (non-ASCII chars replaced with `_`), and preserves the full UTF-8 name in `filename*=UTF-8''...` per RFC 5987. Both `attachment` and `inline` responses use it.
+  - 2 new integration tests in `tests/test_sprint29.py` covering Chinese filenames for both download and inline responses, verifying the header is latin-1 encodable and `filename*=UTF-8''` is present; 924 tests total (up from 922)
+
 ## [v0.50.18] Recover from invalid default workspace paths (PR #366)
 
 - **WebUI no longer breaks when the configured default workspace is unavailable** (`api/config.py`): The workspace resolution path was refactored into three composable functions — `_workspace_candidates()`, `_ensure_workspace_dir()`, and `resolve_default_workspace()`. When the configured workspace (from env var, settings file, or passed path) cannot be created or accessed, the server falls back through an ordered priority list: `HERMES_WEBUI_DEFAULT_WORKSPACE` env var → `~/workspace` (if exists) → `~/work` (if exists) → `~/workspace` (create it) → `STATE_DIR/workspace`.

README.md

@@ -470,25 +470,25 @@ api/
   models.py             Session model + CRUD + CLI bridge (~377 lines)
   onboarding.py         First-run onboarding wizard, OAuth provider support (~507 lines)
   profiles.py           Profile state management, hermes_cli wrapper (~411 lines)
-  routes.py             All GET + POST route handlers (~2200 lines)
+  routes.py             All GET + POST route handlers (~2250 lines)
   state_sync.py         /insights sync — message_count to state.db (~113 lines)
-  streaming.py          SSE engine, run_agent, cancel support (~560 lines)
+  streaming.py          SSE engine, run_agent, cancel support (~660 lines)
   updates.py            Self-update check and release notes (~257 lines)
   upload.py             Multipart parser, file upload handler (~82 lines)
   workspace.py          File ops, workspace helpers, git detection (~288 lines)
 static/
   index.html            HTML template (~600 lines)
   style.css             All CSS incl. mobile responsive, themes (~1050 lines)
-  ui.js                 DOM helpers, renderMd, tool cards, context indicator (~1900 lines)
+  ui.js                 DOM helpers, renderMd, tool cards, context indicator (~1740 lines)
   workspace.js          File preview, file ops, git badge (~286 lines)
-  sessions.js           Session CRUD, collapsible groups, search, reload recovery (~840 lines)
+  sessions.js           Session CRUD, collapsible groups, search, reload recovery (~800 lines)
-  messages.js           send(), SSE handlers, rAF throttle, live streaming (~700 lines)
+  messages.js           send(), SSE handlers, live streaming, session recovery (~655 lines)
   panels.js             Cron, skills, memory, profiles, settings (~1438 lines)
   commands.js           Slash command autocomplete (~267 lines)
   boot.js               Mobile nav, voice input, boot IIFE (~524 lines)
 tests/
   conftest.py           Isolated test server (port 8788)
-  51 test files          802 test functions
+  61 test files          961 test functions
 Dockerfile              python:3.12-slim container image
 docker-compose.yml      Compose with named volume and optional auth
 .github/workflows/      CI: multi-arch Docker build + GitHub Release on tag