docs: actualize REPL docs for startup target, themes, picker, shortcuts

README.md

@@ -14,9 +14,11 @@ Interactive Instagram OSINT CLI on the [HikerAPI](https://hikerapi.com/p/6k1q138
 
 Two surfaces over the same command grammar:
 
-- **REPL** — `insto` drops you into a prompt-toolkit session with tab-completion,
-  a bottom toolbar (active target, backend, quota), and live `/watch`
-  notifications. Visually similar to the Claude Code welcome screen.
+- **REPL** — `insto` (or `insto @user` to pre-select a target) drops you into a
+  prompt-toolkit session with tab-completion, a bottom toolbar (active target,
+  backend, quota), six switchable colour themes (`/theme` opens a live-preview
+  picker), and live `/watch` notifications. Visually similar to the Claude Code
+  welcome screen.
 - **One-shot** — `insto @user -c <command> [args]` runs a single slash-command
   and exits. Pipe-friendly: `--json -` writes to stdout, `--csv -` does the
   same for flat commands, `/batch -` reads targets from stdin.

docs/basic-usage.md

@@ -5,10 +5,11 @@ Two surfaces, same command grammar. Anything you can do in the REPL you can do a
 ## REPL
 
 ```sh
-insto
+insto                      # REPL
+insto @instagram           # REPL with @instagram pre-selected as the target
 ```
 
-You land in a prompt with a welcome panel (INSTO logotype + tips + recent activity + live HikerAPI balance) and a bottom toolbar showing the current target, backend, and remaining requests.
+You land in a prompt with a welcome panel (INSTO logotype + tips + shortcuts + recent activity + live HikerAPI balance) and a bottom toolbar showing the current target, backend, and remaining requests. Launching with `insto @user` pre-selects the target (shown in the banner + the `insto @user>` prompt); the pk resolves on first use.
 
 ```text
 insto @→ /
@@ -30,7 +31,9 @@ Any single-target command also accepts an inline username — does NOT mutate th
 /info nasa                 # one-off lookup, target stays at @instagram
 ```
 
-`Ctrl+T` flashes the active target. `Ctrl+L` redraws the welcome banner. Up-arrow walks history; `Ctrl+R` is incremental search.
+`Ctrl+T` flashes the active target. `Ctrl+L` redraws the welcome banner. `Ctrl+C` cancels the current line. Up-arrow walks history; `Ctrl+R` is incremental search. These shortcuts are also listed in the welcome banner.
+
+`/help` lists every command grouped by category. `/theme` (with no name) opens an interactive picker — `↑`/`↓` live-preview each theme on the banner, Enter applies; `/theme <name>` switches directly. Themes: `aiograpi` (default), `amber`, `claude`, `cyberpunk`, `hacker`, `instagram`.
 
 `/exit`, `/quit`, or `Ctrl+D` to leave.
 

docs/index.md

@@ -13,10 +13,12 @@ insto -c info instagram              # one-shot lookup, no REPL
 
 Two surfaces over the same command grammar:
 
-- **REPL** — `insto` drops you into a prompt-toolkit session with a slash popup
-  for every command (Claude-Code style), a bottom toolbar showing active target
-  + backend + live HikerAPI balance, Ctrl+T / Ctrl+L keybindings, and live
-  `/watch` notifications via `patch_stdout`.
+- **REPL** — `insto` (or `insto @user` to pre-select a target) drops you into a
+  prompt-toolkit session with a slash popup for every command (Claude-Code
+  style), a bottom toolbar showing active target + backend + live HikerAPI
+  balance, Ctrl+T / Ctrl+L / Ctrl+C keybindings, six switchable colour themes
+  (`/theme` opens a live-preview picker), and live `/watch` notifications via
+  `patch_stdout`.
 - **One-shot** — `insto @user -c <command> [args]` runs a single slash-command
   and exits. Pipe-friendly: `--json -` writes JSON to stdout, `--csv -` does
   the same for flat-row commands, `/batch -` reads targets from stdin.