docs(v0.6): mark boot-read + catalog done, finalise the catalog list

Record the firmware boot-read (serde_json builds for xtensa) and the
just-init catalog as delivered, and replace the proposed French catalog
with the finalised 17-snippet English set (three groups). Note the
→/≠ base-font caveat and the no-clobber seeding guard.

docs/v0.6-markdown.md

@@ -53,10 +53,12 @@ behaviour.
       tab-stop session. Lists **all** snippets — the fuzzy filter handles clutter,
       so there's no hidden "inline-only vs palette-only" split. Rows read
       `Name [prefix]`, so browsing also teaches the inline trigger.
-- [ ] **Boot wiring.** The host reads `/sd/repo/.typoena.snippets.json` at boot
+- [x] **Boot wiring.** The host reads `/sd/repo/.typoena.snippets.json` at boot
       and calls `Editor::set_snippets` (mirroring `set_prefs`); a missing or
       malformed file is non-fatal (no snippets, editor runs). Parse lives in the
-      host-testable `editor` crate via `serde_json` — the one new dependency.
+      host-testable `editor` crate via `serde_json` — the one new dependency,
+      confirmed to build for xtensa (`cargo check`, firmware 0.6.0). On-device
+      smoke-test still pending.
 
 ## The palette, generalised (`Cmd-P` · `>` · `$`) — done in core
 
@@ -81,25 +83,30 @@ them: `Go to file · > settings · $ snippets`.
 Labels avoid `…`/`↹` — the palette/panel fonts are ISO-8859-15, which has neither
 glyph — so `new file...` uses ASCII dots and the pause hint leads with `»`.
 
-## First-time setup — snippet catalog (`just init`)
+## First-time setup — snippet catalog (`just init`) — done
 
-[`just init`](../firmware/README.md#provisioning-an-sd-card) gains a step that
-seeds the two git-tracked config files into `repo/` (so they commit + sync on the
-device's first `:sync`): a starter [`.typoena.toml`](typoena-toml.md) (the four
-keys at their defaults, or confirmed at a prompt) and a
-[`.typoena.snippets.json`](typoena-snippets.md) chosen from a **curated catalog**
-checked into the repo. The catalog is grouped and opt-in — you pick the groups
-you want rather than getting all of one writer's personal templates. Not every
-Zed snippet is worth proposing: the Slidev/blog-pipeline ones (`@[youtube]`,
-`<v-clicks>`, frontmatter, mermaid) and render-dependent or hyper-specific ones
-are left out of the menu, since a distraction-free prose appliance can't render
-them and you'd never miss them. **Proposed groups (pending sign-off):**
+[`just init`](../firmware/README.md#provisioning-an-sd-card) seeds the two
+git-tracked config files into `repo/` (so they commit + sync on the device's
+first `:sync`), **writing only a file that is absent** so a re-`init` never
+clobbers a synced library: a starter [`.typoena.toml`](typoena-toml.md) (the five
+keys at their defaults) and a [`.typoena.snippets.json`](typoena-snippets.md)
+assembled from a **curated catalog** (`firmware/snippets-catalog/`, `jq`-merged).
+The catalog is grouped and opt-in — you pick the groups (each `[Y/n]`, all-yes on
+a non-interactive run) rather than getting one writer's whole personal set. Not
+every Zed snippet is worth proposing: the Slidev/blog-pipeline ones (`@[youtube]`,
+`<v-clicks>`, frontmatter, mermaid) and hyper-specific personal ones are left out,
+since a distraction-free prose appliance can't render them and you'd never miss
+them. Prefixes are **English** (except `edanso`, the mnemonic for `œ`), bodies
+translated from the source Zed snippets. **Three groups, 17 snippets:**
 
-  - [ ] **Symbols** (inline, keyboard can't type them): `fleche`→`→`,
-        `different`→`≠`, `fois`→`×`, `median`→`·`, `degre`→`°`, `euro`→`€`,
-        `edanso`→`œ` (dead keys in v0.2.5 cover accents, *not* these).
-  - [ ] **Structure**: `todo`→`- [ ] `, `link`→`[$1]($2)$0`, `img`→`![$1]($2)$0`
-        (net-new — obvious for Markdown), `table`, `code` (fenced block).
-  - [ ] **Prose / PKM templates** (`${n:label}` stripped to `$n`): `fiche`
-        (book notes), `reference`/`refangl` (reference block), `biais`,
-        `capture`, `standard`, `5w1h`.
+  - [x] **Symbols** (inline, the keyboard can't type them): `arrow`→`→`,
+        `neq`→`≠`, `times`→`×`, `middot`→`·`, `deg`→`°`, `euro`→`€`, `edanso`→`œ`
+        (dead keys in v0.2.5 cover accents, *not* these). **Caveat:** `→` (U+2192)
+        and `≠` (U+2260) are outside ISO-8859-15, so they store correctly and sync
+        but render as a missing-glyph box on the device panel until the font is
+        extended; the other five are Latin-9 and draw fine. Kept deliberately.
+  - [x] **Structure**: `todo`→`- [ ] `, `link`→`[$1]($2)$0`, `img`→`![$1]($2)$0`,
+        `table` (2-col), `code` (fenced block). `img`/`code` are net-new.
+  - [x] **Prose / PKM templates** (`${n:label}` stripped to `$n`): `booknotes`,
+        `reference` (the English reference block — `refangl` folded in), `bias`,
+        `capture`, `standard`. (`5w1h` dropped.)