Add v0.2.0 announcement SVG/PNG and community post drafts

Signed-off-by: André Ahlert <andre@aex.partners>

Author: andreahlert

assets/announcement.png

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+# v0.2.0 Announcement Posts
+
+## Discord (htmx server)
+
+just shipped v0.2.0 of htmx-devtools with full htmx 4.0 alpha support. the extension auto-detects which version you're running and adapts everything transparently. no config needed.
+
+what's new:
+- dual version support (2.x + 4.0 working simultaneously)
+- request tracking via ctx objects for htmx 4 (since XHR is gone)
+- synthetic error detection for HTTP 4xx/5xx (htmx 4 doesn't fire error events for these)
+- LCS-based DOM diff in the swap visualizer
+- request history per element in the elements tab
+- version badge showing which htmx you're running (blue for 2.x, purple for 4.0)
+
+live demos you can try right now without installing anything:
+- htmx 2.x: https://atoolz.github.io/htmx-devtools/v2/
+- htmx 4.0: https://atoolz.github.io/htmx-devtools/v4/
+
+repo: https://github.com/atoolz/htmx-devtools
+
+feedback welcome, especially from anyone already testing htmx 4 alpha
+
+---
+
+## Reddit (r/htmx)
+
+**Title:** HTMX DevTools v0.2.0 - now with htmx 4.0 alpha support
+
+Just released v0.2.0 of the HTMX DevTools browser extension. The big addition is full htmx 4.0 alpha support alongside the existing 2.x support. The extension auto-detects which version is running and adapts transparently.
+
+**What changed in v0.2.0:**
+
+htmx 4.0 is a ground-up rewrite that replaces XHR with fetch(), changes all event names to colon-namespaced format, and merges all error events into a single `htmx:error`. The devtools now handles all of this:
+
+- Canonical event mapping layer that normalizes both 2.x and 4.0 event names
+- Request tracking via ctx WeakMap for htmx 4 (replaces XHR tracking)
+- Synthetic HTTP error detection for 4xx/5xx responses (htmx 4 swaps these by default without firing error events)
+- Support for new htmx 4 attributes (hx-action, hx-method, hx-config, hx-status)
+- Version badge in the panel (blue for 2.x, purple for 4.0)
+
+**Other improvements:**
+
+- LCS-based DOM diff algorithm in the Swap Visualizer (replaces the naive set-based diff)
+- Request history per element in the Element Inspector (click to jump to Requests tab)
+- Element tree auto-refreshes in real time with debounced event subscription
+- Per-tab search filters (no longer shared between tabs)
+- Better serialization handling for htmx 4 detail objects (Response, Headers, ctx)
+
+**Try it without installing:**
+
+- htmx 2.x demo: https://atoolz.github.io/htmx-devtools/v2/
+- htmx 4.0 demo: https://atoolz.github.io/htmx-devtools/v4/
+
+Both demos use client-side mock servers so everything works in the browser.
+
+**Install from source:**
+
+```
+git clone https://github.com/atoolz/htmx-devtools.git
+cd htmx-devtools && npm install && npm run build:chrome
+```
+
+Then load `dist/` as unpacked extension in chrome://extensions.
+
+GitHub: https://github.com/atoolz/htmx-devtools
+
+Looking for feedback from anyone testing htmx 4 alpha. What's missing? What would make this more useful?
+
+---
+
+## Twitter/X
+
+htmx-devtools v0.2.0: now works with htmx 4.0 alpha
+
+auto-detects 2.x vs 4.0, adapts transparently. no config needed.
+
+new: ctx-based request tracking (XHR is gone in 4.0), synthetic HTTP error detection, LCS DOM diffs, per-element request history, version badge
+
+try it: https://atoolz.github.io/htmx-devtools/v4/
+repo: https://github.com/atoolz/htmx-devtools