docs: refresh Lens recordings and correct README claims

Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>

docs/index.html

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         <figure class="product-shot">
             <div class="shot-bar"><span class="live">CBM LENS · OPEN BETA v0.0.1</span><span class="shot-path">codebase-memory-mcp / architecture</span><span>LOCAL WORKSPACE</span></div>
-            <a href="images/lens-overview.gif" aria-label="View the full CBM Lens architecture walkthrough"><picture><source media="(prefers-reduced-motion: reduce)" srcset="images/lens-architecture.png" width="1440" height="900"><img src="images/lens-overview.gif" width="960" height="600" alt="CBM Lens architecture walkthrough: explore the source folders, open src/pipeline, select artifact.c and read its source" fetchpriority="high"></picture></a>
+            <a href="images/lens-overview.gif" aria-label="View the full CBM Lens architecture walkthrough"><picture><source media="(prefers-reduced-motion: reduce)" srcset="images/lens-architecture.png" width="1440" height="900"><img src="images/lens-overview.gif" width="1600" height="1000" alt="CBM Lens architecture walkthrough: open src/foundation, select arena.c and read its source beside the map" fetchpriority="high"></picture></a>
             <figcaption>See the MCP server’s graph through CBM Lens, its optional visual companion. Open beta v0.0.1, captured in October 2026. <a href="https://github.com/DeusData/codebase-memory-mcp/blob/main/docs/images/README.md">Capture details ↗</a></figcaption>
         </figure>
         <div class="facts" aria-label="Project at a glance">
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         </div>
         <div class="gallery">
-            <figure><a href="images/lens-galaxy.gif" aria-label="View the full CBM Lens Galaxy walkthrough"><picture><source media="(prefers-reduced-motion: reduce)" srcset="images/lens-galaxy.jpg" width="1280" height="720"><img src="images/lens-galaxy.gif" width="960" height="600" alt="CBM Lens Galaxy walkthrough: search a function, expand its outgoing calls and follow a path through the graph" loading="lazy"></picture></a><figcaption><strong>Follow the connections</strong>Search, expand connections and follow paths.</figcaption></figure>
+            <figure><a href="images/lens-galaxy.gif" aria-label="View the full CBM Lens Galaxy walkthrough"><picture><source media="(prefers-reduced-motion: reduce)" srcset="images/lens-galaxy.jpg" width="1280" height="720"><img src="images/lens-galaxy.gif" width="1600" height="1000" alt="CBM Lens Galaxy walkthrough: expand cbm_arena_alloc and follow its call path through arena_grow to cbm_alloc" loading="lazy"></picture></a><figcaption><strong>Follow the connections</strong>Expand relationships and trace a call path.</figcaption></figure>
             <figure><a href="images/lens-system-structure.png" aria-label="View the full Lens system structure screenshot"><img src="images/lens-system-structure.png" width="1440" height="900" alt="CBM Lens system structure showing source groups and their dependencies" loading="lazy"></a><figcaption><strong>Inspect system structure</strong>See source groups and dependencies.</figcaption></figure>
-            <figure><a href="images/lens-chat.gif" aria-label="View the full Lens local chat walkthrough"><picture><source media="(prefers-reduced-motion: reduce)" srcset="images/lens-chat.png" width="1440" height="1200"><img src="images/lens-chat.gif" width="960" height="600" alt="CBM Lens local chat walkthrough: ask about a selected symbol and its callers using indexed source facts" loading="lazy"></picture></a><figcaption><strong>Ask about selected code</strong>Optional browser AI, with on-device inference.</figcaption></figure>
+            <figure><a href="images/lens-chat.gif" aria-label="View the full Lens local chat walkthrough"><picture><source media="(prefers-reduced-motion: reduce)" srcset="images/lens-chat.png" width="1440" height="1200"><img src="images/lens-chat.gif" width="1600" height="1000" alt="CBM Lens local chat walkthrough: callers and callees of arena_grow answered directly from the indexed graph" loading="lazy"></picture></a><figcaption><strong>Ask about selected code</strong>Caller and callee answers from the indexed graph.</figcaption></figure>
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         <p class="fine">Lens is served on loopback. Browser AI downloads its optional model after you enable it. Its explanations should be checked against the displayed source.</p>
         <a class="source-link" href="https://github.com/DeusData/codebase-memory-mcp#cbm-lens-beta-code-visualization-and-source-navigation">Read the Lens guide and watch the walkthroughs →</a>