Fix fish shell integration after binary rename to foostore (v0.4.0)v0.4.0

- Rename completions/geheim.fish → completions/foostore.fish
- Update all geheim references to foostore in ge.fish, install-fish.sh, FISH_INTEGRATION.md
- Add fish shell integration section to README
- Fix stale comment in internal/version/version.go

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 41 insertions, 1 deletions

diff --git a/README.md b/README.md
index 77ed9d8..6852f12 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,46 @@ This is for my own use. So the documentation here may be lacking. But feel free
 * The Git repository can be synchronized with N remote Git repositories (e.g. to two separate VMs for geo-redundancy).
 * Text entries are edited using Helix  (or any other `$EDITOR`)
 * Clipboard support for MacOS and GNOME (Linux).
-* Interactive `geheim` shell support.
+* Interactive `foostore` shell support.
 * Can import and export documuments in batches.
 * Can shred exported data again.
+
+## Fish Shell Integration
+
+Tab completion and a `ge` shortcut wrapper are provided for the [fish shell](https://fishshell.com/).
+
+### Install
+
+```bash
+./install-fish.sh
+exec fish
+```
+
+This copies `completions/foostore.fish` to `~/.config/fish/completions/` and `completions/ge.fish` to `~/.config/fish/functions/`.
+
+### Usage
+
+```bash
+# Tab-complete foostore subcommands
+foostore <TAB>
+
+# ge wrapper: no arguments → interactive shell
+ge
+
+# ge wrapper: bare term → treated as search
+ge mypassword        # same as: foostore search mypassword
+
+# ge wrapper: explicit commands pass through
+ge cat mypassword
+ge import file.txt backup/
+```
+
+Entry-name completion is gated on the `PIN` environment variable to avoid interactive PIN prompts during tab completion:
+
+```fish
+set -x PIN yourpin   # enable entry completion for this session
+ge <TAB>
+set -e PIN           # clear when done
+```
+
+See `FISH_INTEGRATION.md` for more details.