docs: dashboard v0.7.0 release notes

Co-authored-by: Alfonso [Magic Context] <288211368+alfonso-magic-context@users.noreply.github.com>

Author: ualtinok

.alfonso/release-notes/dashboard-v0.7.0.md

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+## Magic Context Dashboard v0.7.0
+
+### Cache Diagnostics, rebuilt
+
+The Cache page now tracks each session in its own bounded window instead of a
+shared global event pool, so the Recent Sessions cards show **per-session**
+hit-ratio, event count, and bust count that no longer drift with how busy other
+sessions are.
+
+- **Per-session windows.** Pick how many recent events to keep per session
+  (200 / 400 / 600 / 800 / 1000); cards and the timeline both reflect exactly
+  that window.
+- **Live, reliable refresh.** A 1-second loop re-lists sessions and fetches only
+  *new* events per session, so the Recent Sessions strip stays current without
+  the manual pause/unpause it sometimes needed before.
+- **One-line strip.** Recent Sessions render as a single row of equal-width
+  cards; how many show adapts to the window width.
+
+### Cache timeline
+
+- **Context-scaled bars.** Bar height is the prompt size relative to the model's
+  context window, with an inner cached segment — so you can see the prompt grow
+  and drop across a session at a glance.
+- **Accurate severity.** Cache health is judged by comparing each step's cached
+  read against what the previous step predicted, instead of a raw ratio that
+  false-warned on large file reads. Providers that don't report cache data show
+  as "unknown" rather than a misleading bust.
+- **Magic-Context-attributed drops.** Drop markers correlate to the actual
+  scheduler decision recorded by the plugin (execute / materialize / emergency),
+  shown in a tooltip. The blue drop line is now clickable and jumps to the step.
+- **Importance heat-map.** The compartment strip in the session view colors each
+  segment by its importance band (critical / high / medium / low) instead of a
+  meaningless rainbow.
+
+### Memories & projects
+
+- **Edit a memory's category** directly from the dashboard (#158).
+- **Non-git projects** now appear in the project picker and filter their memories
+  correctly (#160).
+- **Real project names.** Sessions that ran in a git repo with no remote/commit
+  no longer display as "/"; they show their actual directory.
+- **Windows model dropdown** is populated for version-manager installs
+  (mise / nvm / fnm / volta / asdf) and via a PATH fallback (#149).