chore(zsh): keep ollama models warm and complete claude import (#383)

## What

Two unrelated-to-each-other but equally small zsh config tweaks, grouped
as one chore.

## Why

**`OLLAMA_KEEP_ALIVE=30m`** — Ollama unloads a model from memory 5
minutes after its last request by default. For interactive use that
means a model re-read from disk on almost every return to the terminal.
30m keeps it resident across a normal working rhythm.

**`claude import` completion** — the `_claude` completion file did not
list the `import` subcommand, so it did not complete. Added to both the
top-level command list and the `claude config` list, matching how the
other subcommands are registered in both positions.

## How

Two two-line additions. `zsh -n` passes on the rendered `~/.zshenv`.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: laurigates

dot_zfunc/_claude

@@ -15,6 +15,7 @@ _claude() {
         'auto-mode:Inspect or reset auto mode classifier'
         'doctor:Check the health of your Claude Code'
         'gateway:Run the enterprise auth/telemetry'
+        'import:Import config from another AI coding'
         'install:Install Claude Code native build. Use'
         'mcp:Configure and manage MCP servers'
         'plugin|plugins:Manage Claude Code plugins'
@@ -107,6 +108,7 @@ _claude_config() {
         'auto-mode:Inspect or reset auto mode classifier'
         'doctor:Check the health of your Claude Code'
         'gateway:Run the enterprise auth/telemetry'
+        'import:Import config from another AI coding'
         'install:Install Claude Code native build. Use'
         'mcp:Configure and manage MCP servers'
         'plugin|plugins:Manage Claude Code plugins'

dot_zshenv.tmpl

@@ -15,6 +15,8 @@ export PATH
 
 source ~/.api_tokens
 
+export OLLAMA_KEEP_ALIVE=30m
+
 {{- if and (eq .chezmoi.os "linux") (.chezmoi.kernel.osrelease | contains "truenas") }}
 # TrueNAS: /tmp is mounted noexec, breaking chezmoi's run_* scripts.
 # Redirect TMPDIR to an exec-allowed dataset.